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OpenAI upgrades ChatGPT with interactive learning tools as lawsuits and Pentagon backlash mount

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The past ten days have been among the most consequential in OpenAI’s history, with developments stacking up across product, politics, personnel, and the courts. Here is what happened — and what it means.

OpenAI on Tuesday launched a set of interactive visual tools inside ChatGPT that let users manipulate mathematical and scientific formulas in real time — a genuinely impressive education feature that landed in the middle of the most turbulent stretch of the company’s corporate life.

The new experience covers more than 70 core math and science concepts, from the Pythagorean theorem to Ohm’s law to compound interest. When a user asks ChatGPT to explain one of these topics, the chatbot now generates a dynamic module with adjustable sliders alongside its written response. Drag a variable, and the equations, graphs, and diagrams update instantly. The feature is available today to all logged-in users worldwide, across every plan, including free.

OpenAI tells VentureBeat that 140 million people already use ChatGPT each week for math and science learning. That is a staggering number. It also means the feature arrives with unusually high stakes: since late February, OpenAI has been sued by the family of a 12-year-old mass shooting victim who alleges the company knew the attacker was planning violence through ChatGPT; lost its head of robotics over a Pentagon deal that triggered a near-300% spike in app uninstalls; watched more than 30 of its own employees file a legal brief supporting rival Anthropic against the U.S. government; and scrapped plans with Oracle to expand a flagship data center in Texas. Its chief competitor’s app, Claude, now sits atop the App Store.

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The interactive learning tools are, on their merits, a strong product. They also arrive at a company fighting on every front simultaneously — and burning through an estimated $15 billion in cash this year to do it.

Learning Blocks Press shot Ohms

ChatGPT’s new interactive learning module for Ohm’s Law, with adjustable sliders for current and resistance and a real-time circuit visualization. (Credit: OpenAI)

How the new ChatGPT learning tools actually work

The feature is built on a simple pedagogical premise: students understand formulas better when they can see what happens as the inputs change.

Ask ChatGPT “help me understand the Pythagorean theorem,” and the system now responds with a written explanation alongside an interactive panel. On the left, the formula $a^2 + b^2 = c^2$ appears in clean notation with sliders for sides $a$ and $b$. On the right, a geometric visualization — a right triangle with squares drawn on each side — reshapes dynamically as you adjust the values. The computed hypotenuse updates in real time. The same treatment applies across topics: voltage and resistance for Ohm’s law, pressure and temperature for the ideal gas equation, radius and height for cone volume.

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OpenAI’s initial roster of more than 70 topics targets high school and introductory college material: binomial squares, Charles’ law, circle equations, Coulomb’s law, cylinder volume, degrees of freedom, exponential decay, Hooke’s law, kinetic energy, the lens equation, linear equations, slope-intercept form, surface area of a sphere, trigonometric angle sum identities, and others.

The company cited research suggesting that “visual, interaction-based learning can lead to stronger conceptual understanding than traditional instruction for many students,” and pointed to a recent Gallup survey in which more than half of U.S. adults said they struggle with math. In early testing, OpenAI said, students reported the modules helped them grasp how variables relate to one another, and parents described using them to work through problems alongside their children.

Anjini Grover, a high school mathematics teacher quoted in OpenAI’s announcement, said the feature stands out for “how strongly this feature emphasizes conceptual understanding.” Raquel Gibson, a high school algebra teacher, called it “a step towards empowering students to independently explore abstract concepts.”

The tools build on ChatGPT’s existing education features — a “study mode” for step-by-step problem solving and a quizzes feature for exam prep — and OpenAI said it plans to expand interactive learning to additional subjects. The company also said it intends to publish research through its NextGenAI initiative and OpenAI Learning Lab to study how AI shapes learning outcomes over time.

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Learning Blocks Press shot Pythagorean

An interactive Pythagorean theorem module in ChatGPT, where users can drag sliders to adjust the lengths of a right triangle’s sides and watch the geometry update in real time. (Credit: OpenAI)

A lawsuit alleging OpenAI knew a mass shooter was planning an attack

On the day before OpenAI shipped its education tools, the company faced the most serious legal challenge it has ever faced.

On Monday, the mother of 12-year-old Maya Gebala filed a civil lawsuit against OpenAI in B.C. Supreme Court, alleging the company had “specific knowledge of the shooter’s long-range planning of a mass casualty event” through ChatGPT interactions and “took no steps to act upon this knowledge.” Gebala was shot three times during a mass shooting in Tumbler Ridge, British Columbia on February 10 that killed eight people and the 18-year-old attacker. She suffered what the lawsuit describes as a catastrophic traumatic brain injury with permanent cognitive and physical disabilities.

The claim paints a damning picture of how the shooter used ChatGPT. It alleges the platform functioned as a “counsellor, pseudo-therapist, trusted confidante, friend, and ally” and was “intentionally designed to foster psychological dependency between the user and ChatGPT.” The shooter was under 18 when they began using the service, the suit states, and despite OpenAI’s requirement that minors obtain parental consent, the company “took no steps to implement age verification or consent procedures.”

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OpenAI has separately acknowledged that it suspended the shooter’s account months before the attack but did not alert Canadian law enforcement — a decision that provoked sharp political fallout. B.C. Premier David Eby said after a virtual meeting with Altman that the CEO agreed to apologize to the people of Tumbler Ridge and work with the provincial government on AI regulation recommendations.

None of the claims have been proven in court. OpenAI has not publicly commented on the lawsuit. But the case poses a question that transcends any single legal proceeding: when an AI company’s own internal systems identify a user as dangerous enough to ban, what obligation does it have to tell someone?

The Pentagon deal that split OpenAI from the inside

The Tumbler Ridge lawsuit is unfolding against the backdrop of an internal crisis that has already cost OpenAI key talent and millions of users.

On February 28, CEO Sam Altman announced a deal giving the Pentagon access to OpenAI’s AI models inside secure government computing systems. The agreement came days after Anthropic CEO Dario Amodei publicly refused similar terms, saying his company could not proceed without assurances against autonomous weapons and mass domestic surveillance. The Pentagon responded by designating Anthropic a “supply-chain risk” — a classification normally reserved for foreign adversaries — and Defense Secretary Pete Hegseth barred any military contractor from conducting commercial activity with the company.

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The reaction inside OpenAI was immediate. Caitlin Kalinowski, who joined from Meta in 2024 to build out the company’s robotics hardware division, resigned on principle. “AI has an important role in national security,” she wrote publicly. “But surveillance of Americans without judicial oversight and lethal autonomy without human authorization are lines that deserved more deliberation than they got.” Research scientist Aidan McLaughlin wrote on social media that he “personally don’t think this deal was worth it.” Another employee told CNN that many OpenAI staffers “really respect” Anthropic for walking away.

The reaction outside the company was even more dramatic. ChatGPT uninstalls spiked more than 295% on the day the deal was announced. Anthropic’s Claude surged to No. 1 among free apps on the U.S. Apple App Store and remained there as of this past weekend. Protesters gathered outside OpenAI’s San Francisco headquarters calling for a “QuitGPT” movement.

And in the most extraordinary development, more than 30 OpenAI and Google DeepMind employees — including DeepMind chief scientist Jeff Dean — filed an amicus brief Monday supporting Anthropic’s lawsuit against the Defense Department. The brief argued that the Pentagon’s actions, “if allowed to proceed,” would “undoubtedly have consequences for the United States’ industrial and scientific competitiveness in the field of artificial intelligence and beyond.” The employees signed in their personal capacity, but the spectacle of OpenAI’s own researchers rallying to a competitor’s legal defense against the same government their company just partnered with has no real precedent in the industry.

Altman, to his credit, has not pretended the situation is fine. In an internal memo later shared publicly, he admitted the deal “was definitely rushed” and “just looked opportunistic and sloppy.” He revised the contract to include explicit prohibitions against mass domestic surveillance and the use of OpenAI technology on commercially acquired data. He also publicly said that enforcing the supply-chain risk designation against Anthropic “would be very bad for our industry and our country.”

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Meanwhile, Anthropic warned in court filings that the Pentagon’s blacklisting could cost it up to $5 billion in lost business — roughly equivalent to its total revenue since commercializing its AI technology in 2023. The company is seeking a temporary court order to continue working with military contractors while the case proceeds.

Why OpenAI’s $15 billion cash burn makes every user count

Strip away the lawsuits and the politics, and OpenAI still has a math problem of its own.

The company is expected to burn through approximately $15 billion in cash this year, up from $9 billion in 2025. It has roughly 910 million weekly users. About 95% of them pay nothing. Subscriptions alone cannot bridge that gap, which is why OpenAI is simultaneously building out an internal advertising infrastructure and leaning on partners like Criteo — and reportedly The Trade Desk — to bring advertisers into ChatGPT.

The company is hiring aggressively for this effort: a monetization infrastructure engineer, an engineering manager, a product designer for the ads experience, a senior manager for ad revenue accounting, and a trust and safety specialist dedicated to the ads product, all based at headquarters in San Francisco. The compensation bands run as high as $385,000 — the kind of investment a company makes when it plans to own its ad stack, not rent it.

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But advertising inside ChatGPT introduces a trust problem that compounds the ones OpenAI is already managing. Users who abandoned the app over the Pentagon deal demonstrated that loyalty to ChatGPT is thinner than its market share suggests. Adding commercial messages to a product already under fire for its military ties and its handling of a mass shooter’s data will require OpenAI to navigate user sentiment with a precision it has not recently demonstrated.

The infrastructure picture is equally unsettled. Oracle and OpenAI recently scrapped plans to expand a flagship AI data center in Abilene, Texas, after negotiations stalled over financing and OpenAI’s evolving needs. Meta and Nvidia moved quickly to explore the site — a reminder that in the current AI arms race, any gap in execution gets filled by a competitor within days.

Why interactive learning is OpenAI’s strongest remaining argument

Beyond the product itself, the education feature carries strategic significance for OpenAI.

Education has always been ChatGPT’s cleanest use case — the application where the technology most obviously augments human capability rather than surveilling it, weaponizing it, or monetizing the attention of people who came looking for help. It is the use case that resonates across demographics: students prepping for the SAT, parents revisiting algebra at the kitchen table, adults circling back to concepts they never quite understood. And it is the use case where ChatGPT still holds a clear lead. Google’s Gemini, Anthropic’s Claude, and xAI’s Grok are all investing in education, but none has shipped anything comparable to real-time interactive formula visualization embedded in a conversational interface.

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OpenAI acknowledged that the “research landscape on how AI affects learning is still taking shape,” but pointed to its own early findings on study mode as showing “promising early signals.” The company said it will continue working with educators and researchers through its NextGenAI initiative and OpenAI Learning Lab, and plans to publish findings and expand into additional subjects.

Somewhere tonight, a ninth-grader will open ChatGPT, drag a slider, and watch a hypotenuse lengthen across her screen. The Pythagorean theorem will make sense for the first time. She will not know about the Pentagon deal, or the Tumbler Ridge lawsuit, or the 295% spike in uninstalls, or the $15 billion cash burn underwriting the server that just rendered her triangle. She will only know that it worked. For OpenAI, that may have to be enough — for now.

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AI animation studio Toonstar will turn books into digital shows for HarperCollins

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HarperCollins is tapping into AI to bring some of its book franchises to life. Specifically, the publisher is teaming up with Toonstar, an AI animation studio, to turn them into digital shows. The first project will be an adaptation of Lisa Greenwald’s “Friendship List” series, which will also be joined by a graphic novel.

You’d be forgiven for being unaware of Toonstar, a studio that received some buzzy early on for simplifying typically complex animation pipelines with AI, but has mostly remained under the radar. Its biggest claim to fame is producing StEvEn and Parker YouTube series, which has amassed 3.38 million subscribers and sometimes has episodes reaching around a million views. It’s not something I’ve heard animation fans speaking about, though. And honestly, it was tough to sit through a few minutes of its sub-South Park animation.

“By leaning into the [AI] technology, we can make full episodes 80 percent faster and 90 percent cheaper than industry norms,” Toonstar co-founder John Attanasio, told The New York Times last year. In that same interview, the company revealed that it uses AI across its production, including having it dub dialog for international audiences, as well as working on storylines.

Toonstar initially pitched itself as an animation studio leaning into Web3 and NFTs, but those technologies seem virtually absent from the company’s presence today. Space Junk, one of its early series, was “put on hold for a variety of reasons,” a representative told Engadget. “It’s possible we’ll resurrect the concept in the future,” they added. Its original domain now points to a crypto gambling site.

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“We’re honored to bring Friendship List to life as an animated series,” Attanasio said in a press release. “Our artist-centered approach ensures these beloved characters and stories stay true to the author’s vision, while our Ink & Pixel production technology enables fast, high-quality production at scale which unlocks the ability to meet audiences where and when they enjoy content today.”

Toonstar has certainly proved it can make “content” for YouTube. Can it actually produce an enjoyable animat edshow? That’s another question entirely.

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Iran Strikes Leave Amazon Availability Zones ‘Hard Down’ In Bahrain and Dubai

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Iranian strikes have reportedly knocked out key AWS availability zones in Bahrain and Dubai, leaving parts of both regions effectively offline for an extended period and forcing Amazon to urge teams and customers to shift workloads elsewhere. “These two regions continue to be impaired, and services should not expect to be operating with normal levels of redundancy and resiliency,” an internal Amazon communication memo reads. “We are actively working to free and reserve as much capacity as possible in the region for customers, and services should be scaled to the minimal footprint required to support customer migration.” Big Technology reports: With the war now nearing its sixth week, Iran has made Amazon infrastructure in the Gulf an economic target and is now eyeing its peers. Amazon’s Bahrain facilities have been hit multiple times, including a Wednesday strike that caused a fire. And its facilities in the UAE also sustained multiple hits. The IRGC is threatening multiple other U.S. tech giants, including Microsoft, Google, and Apple.

Amazons infrastructure in Bahrain and Dubai each have three ‘availability zones’ or clusters of compute. Both Bahrain and Dubai have a zones that are “hard down” and and “impaired but functioning,” per the internal communication. “We do not have a timeline for when DXB and BAH will return to normal operations,” the internal post said.

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Microsoft's LinkedIn is scanning installed browser extensions without user permission

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Researchers have determined that Microsoft’s LinkedIn is scanning browser plug-ins and other information without permission, building user profiles using data that the company did not get permission to take.

Safari web browser logo centered over overlapping Apple devices displaying web pages, highlighting Safari as the main browsing app on iPhone and Mac screens
Safari

A European advocacy group claims LinkedIn is probing browser extensions through its website code. Fairlinked e.V. published its “BrowserGate” report alleging LinkedIn detects installed browser extensions by probing for known identifiers through JavaScript. The group says the technique reveals personally identifiable information.
Safari users are less likely to be affected by this specific mechanism, based on how extension detection typically works across browsers. Apple’s browser model limits fingerprinting surfaces, which reduces how much information sites can infer from installed extensions.
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Revel Performa4 Speaker Series Debut at AXPONA 2026 Priced From $2,000-$7,000

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Revel is heading into AXPONA 2026 (April 10-12) with a clear focus: the debut of its new Performa4 speaker series, expected to fall between $2,000 and $7,000 per pair. Under the HARMAN Luxury Audio Group umbrella, which also includes Arcam, JBL Synthesis, Lexicon, and Mark Levinson, Revel isn’t going after statement pricing here. Performa4 is aimed at the part of the market where most serious systems are actually built, and where the competition is crowded, well established, and not particularly forgiving.

Revel Performa4 Speaker Series

Revel’s Performa4 Series is a new loudspeaker line built on the company’s established approach to acoustic design and measurement. It reflects three decades of engineering focused on controlled performance and consistent results in real-world listening environments.

Revel’s Performa4 Series consists of two floorstanding models (F346 and F345), two bookshelf speakers (M146 and M145), a center channel (C245), and a powered subwoofer (B140). With multiple configurations available, the Performa4 lineup can be used in both two-channel music systems and multichannel home theater setups.

At Revel, science is at the heart of everything we do. The Performa4 series represents the culmination of thousands of hours of research, development, and real-world testing. With our new 7th-generation Acoustic Lens waveguide and advanced DCC and MCC transducers, we’ve raised the bar for what’s possible in this class,” said Jim Garrett, Senior Director of Product Strategy and Planning at HARMAN Luxury Audio.

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Acoustic Lens Waveguide, DCC and MCC Transducers Explained

The Performa4 series uses Revel’s Deep Ceramic Composite (DCC) and Micro Ceramic Composite (MCC) drivers, developed to improve stiffness while keeping mass low and reducing unwanted coloration.

Woofer and midrange drivers are built on cast aluminum frames designed with Finite Element Analysis to optimize airflow, control resonance, and maintain structural stability. Each driver also uses an inverted surround and integrated trim ring, which simplifies the front baffle and keeps the layout clean.

Revel’s 7th-generation Acoustic Lens waveguide is paired with a 1-inch DCC dome tweeter to improve integration with the midrange driver. The waveguide is designed to control dispersion more consistently across the listening area, while also supporting higher efficiency and lower distortion, including at off-axis positions.

Revel Performa4 Industrial Design

The Performa4 series adopts a clean, modern design that builds on Revel’s established cabinet approach without adding unnecessary complexity.

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All models use magnetically attached grilles for a flush, hardware-free front panel, along with black accent detailing that keeps the visual profile consistent across the range. Cabinets are internally cross-braced to improve rigidity and reduce unwanted vibration.

Curved side panels are finished in real wood veneers, available in Natural Walnut and Black Walnut, offering a straightforward aesthetic that fits into both traditional and contemporary spaces.

Revel Performa4 Models


F346 

f346

The F346 is a 3-way floorstanding loudspeaker and the top model in the Performa4 series.

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It uses three 6.5-inch (165mm) MCC woofers, a 6.5-inch (165mm) DCC midrange driver, and a 1-inch (25mm) DCC dome tweeter paired with Revel’s 7th-generation Acoustic Lens waveguide.

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Dual rear-firing ports provide low-frequency extension, while dual 5-way binding posts support bi-amping or bi-wiring. The cabinet is fitted with solid aluminum feet and includes optional floor spikes for added stability.

The F346 is rated for a frequency response of 30Hz to 40kHz (±6dB), with 88dB sensitivity and a nominal impedance of 6 ohms. Recommended amplifier power ranges from 20 to 250 watts.

F345

f345

The F345 is a 3-way floorstanding loudspeaker that shares the same core design as the F346, using smaller drivers in a more compact cabinet.

It features three 5.25-inch (130mm) MCC woofers, a 5.25-inch (130mm) DCC midrange driver, and a 1-inch (25mm) DCC dome tweeter paired with Revel’s 7th-generation Acoustic Lens waveguide.

Dual rear-firing ports support low-frequency output, while dual 5-way binding posts allow for bi-amping or bi-wiring. The cabinet includes solid aluminum feet with optional spikes for placement flexibility.

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The F345 is rated for a frequency response of 36Hz to 40kHz (±6dB), with 87dB sensitivity and a nominal impedance of 6 ohms. Recommended amplifier power ranges from 30 to 225 watts.

M146

m146

The M146 is a 2-way bookshelf or standmount speaker positioned in the middle of the Performa4 lineup.

It uses a 6.5-inch (165mm) MCC woofer paired with a 1-inch (25mm) DCC dome tweeter and Revel’s 7th-generation Acoustic Lens waveguide.

The crossover network incorporates air-core inductors, and dual 5-way binding posts support bi-amping or bi-wiring. Optional MFS4 floor stands are available for proper placement and listening height.

The M146 is rated for a frequency response of 43Hz to 40kHz (±6dB), with 86dB sensitivity and a nominal impedance of 6 ohms. Recommended amplifier power ranges from 15 to 200 watts.

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M145 

m145

The M145 is a compact 2-way bookshelf speaker and the smaller option in the Performa4 lineup.

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It features a 5.25-inch (130mm) MCC woofer paired with a 1-inch (25mm) DCC dome tweeter and Revel’s 7th-generation Acoustic Lens waveguide.

Like the M146, it includes 5-way binding posts for flexible connectivity and is compatible with the optional MFS4 floor stands for proper positioning.

The M145 is rated for a frequency response of 54Hz to 40kHz (±6dB), with 85dB sensitivity and a nominal impedance of 6 ohms. Recommended amplifier power ranges from 15 to 150 watts.

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C245

c245

The C245 is a dedicated center channel speaker designed for use in multichannel systems with other Performa4 models.

It features dual 5.25-inch (130mm) MCC woofers flanking a 1-inch (25mm) DCC dome tweeter, paired with Revel’s 7th-generation Acoustic Lens waveguide for consistent dispersion across the front soundstage.

The C245 is rated for a frequency response of 55Hz to 40kHz (±6dB), with 86dB sensitivity and a nominal impedance of 6 ohms. Recommended amplifier power ranges from 15 to 200 watts.

B140 

b140

The B140 is a powered subwoofer designed to integrate with the Performa4 series in both two-channel and home theater systems.

It uses a 10-inch (250mm) fiber-composite woofer driven by a 750-watt RMS Class D amplifier, with up to 1,500 watts peak output. The design targets low-frequency extension down to 26Hz.

Rear-panel controls include a variable low-pass filter (50–150Hz), LFE input, phase adjustment, volume control, and auto on/off functionality. A rear-ported enclosure using Revel’s Constant Pressure Gradient design is intended to reduce turbulence and maintain cleaner low-frequency output.

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MFS4 Floorstands 

mfs4-stands

Revel also offers the optional MFS4 floor stands for the M146 and M145 bookshelf speakers.

Constructed from extruded aluminum and steel, the MFS4 stands are designed to position each speaker at an appropriate listening height. They include built-in cable management and optional spikes for use on carpeted surfaces. The stands are sold in pairs.

Revel Performa 4 Comparisons

Revel Model  F346 F345 M146 M145  C245
Speaker Type Floorstanding Floorstanding Bookshelf Bookshelf Center
Price $6,999/pair $4,999/pair $2,999/pair $1,999/pair $1,499/each
Speaker Configuration  3-way 3-way 2-way 2-way 2-way
Tweeter 1-inch (25mm) DCC Dome Tweeter with Acoustic Lens and 7th-Generation Waveguide 1-inch (25mm) DCC Dome Tweeter with Acoustic Lens and Waveguide  1-inch (25mm) DCC Dome Tweeter with Acoustic Lens and Waveguide 1-inch (25mm) DCC Dome Tweeter with Acoustic Lens and Waveguide  1-inch (25mm) DCC Dome Tweeter with Acoustic Lens and Waveguide 
Midrange 1 x 6.5 in (165 mm) Deep Ceramic Composite (DCC) Cone Driver 1 x 5.25 in (135 mm) Deep Ceramic Composite (DCC) Cone Driver  N/A N/A N/A
Woofer 3 x 6.5 in (165 mm) Micro Ceramic Composite (MCC) Cone Woofers 3 x 5.25 in (135 mm) Micro Ceramic Composite (MCC) Cone Woofers 1 x 6.5-inch (165 mm) Micro Ceramic Composite (MCC) Cone Woofer 1 x 5.25 inch (130 mm) Micro Ceramic Composite (MCC) Cone Woofer 2 x 5.25-inch (135 mm) Micro Ceramic Composite (MCC) Cone Woofers
Enclosure Tuning  Bass-Reflex via Dual Rear-Mounted Ports Bass-Reflex via Dual Rear-Mounted Ports Bass-Reflex via Rear-Mounted Port Bass-Reflex via Rear-Mounted Port Bass-Reflex via Rear-Mounted Port
Nominal Impedance 6 Ohms 6 Ohms 6 Ohms 6 Ohms 6 Ohms
Sensitivity @ 1m, 2.83V 88 dB 87 dB 85.5 dB 85 dB 86 dB
Recommended Amplifier Power 20-250W 30-225W 15-200W 15-150W 15-200W
Frequency Response +/-6 dB 30 Hz – 40 kHz 36 Hz – 40 kHz 43 Hz – 40 kHz 54 Hz – 40 kHz 55 Hz – 40 kHz
Crossover Frequency 275 Hz / 1.7 kHz 350 Hz / 2.1 kHz 1.7 kHz 1.8 kHz 1.8 kHz
Dimensions 44.4 x 14.1 x 16.3 inches

1127 x 357.33 x 414.48 mm

40.9 x 11.9 x 13.9 inches
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1038 x 301.86 x 352.46 mm

14.1 x 9.7 x 12.7 inches

359 x 245.56 x 322.57mm

11.6 x 7.9 x 9.6 inches
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294 x 200 x 245mm

7.1 x 23.4 x 10.9 inches

181 x 594.5 x 277 mm

Product Weight 87.5 lbs / 39.7 kg 64 lbs / 29.1 kg 24.3 lbs / 11 kg 15 lbs / 6.8 kg 27.1 lbs / 12.3 kg

Revel B140 Subwoofer

Revel Model B140
Product Type  Powered Subwoofer
Price $2,999/each
Driver 250mm (10-inch) Coated Fibre Composite Cone Driver in a cast-Aluminum frame
Amplifier Type Class D amplifier
Power Output 750W RMS (1500W peak) 
Enclosure Tuning Bass-Reflex via Rear-Mounted Port
Controls  Auto Power, Crossover, Level, Phase
Inputs RCA LFE/Line Level, 3.5mm, 12V Trigger
Frequency Response +/-6 dB 26Hz – 150Hz
Crossover Frequency (Variable) 50Hz – 150Hz
Dimensions 14.8 x 16.9  x 17.2 inches
(376.2 x 429.28 x 436.37 mm)
Weight 61.3 lbs / 27.8 kg

The Bottom Line 

Revel’s Performa4 series is a calculated move into one of the most competitive segments in loudspeakers. The combination of DCC and MCC driver materials, the 7th-generation Acoustic Lens waveguide, and consistent cabinet engineering across the range points to a focus on controlled dispersion, tonal consistency, and predictable in-room performance; areas where Revel has historically been very disciplined.

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The lineup is clearly built for flexibility. It can anchor a straightforward two-channel system or scale into a full home theater without mixing and matching across different voicings. That matters for buyers who want system coherence without overthinking every component swap.

What’s less clear is how much separation there is between models beyond size and output, and whether the subwoofer’s pricing will make sense for buyers building out a full system. There’s also no indication of built-in room correction or system-level integration features, which are becoming more common even in passive speaker ecosystems when paired with modern electronics.

This is for listeners who want a complete, measurement-driven speaker system in the $2,000 to $7,000 range without stepping into five-figure territory. Not entry-level, not cost-no-object—right in the middle where most serious systems live.

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At AXPONA 2026, the F346 will be demonstrated with an Arcam SA45 integrated streaming amplifier and CD5 CD player, which should give a clear sense of how the top model performs with both streaming and physical sources.

Pricing & Availability

The Revel Performa4 series begins shipping in April through authorized Revel dealers and custom installation installers. All models are available in Natural Walnut and Black Walnut wood veneer finishes.

Suggested retail pricing is as follows:

  • F346 Triple 6.5-inch Floorstanding Speaker – $6,999/pair
  • F345 Triple 5.25-inch Floorstanding Speaker – $4,999/pair
  • M146 6.5-inch Bookshelf Speaker – $2,999/pair
  • M145 5.25” Bookshelf Speaker – $1,999/pair
  • C245 Dual 5.25” Center Channel Speaker – $1,499/each
  • B140 10-inch Powered Subwoofer – $2,999/each
  • MFS4 Floor Stands – $699/pair 

The Revel Performa4 series will make its official debut at AXPONA 2026, April 10-12, at the Schaumburg Convention Center in Chicago, IL.

For more information, visit www.revelspeakers.com

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MLB's robot-assisted strike zone is exposing umpire errors in real time

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The technology is designed to reduce strike zone disputes, long the source of baseball’s most heated arguments. Under the new system, each team receives two challenges per game and only loses a challenge if it is incorrect. In practice, this incentive has quickly reshaped game-day strategy – and last Saturday’s…
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Scientists Have Made a French Fry Breakthrough

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French fries are delicious, but notoriously unhealthy. A research team at the University of Illinois, however, has developed a deceptively straightforward method to keep the satisfying taste and crunch without requiring as much oil.

The cooking method combines traditional frying and microwave heating. Adding that microwave step could reduce the amount of oil used in the process, meaning you would absorb less fat with each bite. All the secrets to being able to cook fries in this way have been laid out in two studies published in Current Research in Food Science and The Journal of Food Science.

French Fries and Health

Although popular, fried foods contain high levels of fat, which is linked to several health problems, including obesity and hypertension. “Consumers want healthy foods, but at the time of purchase, cravings often prevail,” says Pawan Singh Takhar, author of one of the two studies. “The high oil content adds flavor, but it also contains a lot of energy and calories.”

It’s precisely with the goal of helping consumers make better food choices without feeling deprived that researchers have been trying to figure out how they can cook healthier french fries, achieving lower fat content without altering their taste and texture.

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One of the main difficulties in frying, as the studies explain, is preventing the oil from penetrating the food. In the early stages of the french fry process, in fact, the pores of the potato are filled with water, leaving no room for the oil.

As cooking continues, however, the water evaporates, creating empty spaces that allow the oil to be drawn in by negative pressure. Much of the frying process takes place under that negative pressure, which essentially increases the tendency of the oil to be sucked into the fries

A New Wavelength

In the new study, therefore, the researchers tried to figure out how to extend the time in positive pressure and reduce the period under negative pressure. “When we heat something in a traditional oven, the heat transfers from the outside to the inside, but a microwave oven heats from the inside to the outside because the microwaves penetrate everywhere in the material,” Takhar says.

Specifically, microwaves cause water molecules to oscillate, resulting in increased vapor formation and thus shifting the pressure profile toward positive values that prevent the oil from being easily absorbed.

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Microwave frying alone, however, would not produce the desired texture. “If only microwaving is used, the food turns out mushy,” says Takhar. In order to achieve crispness, frying and microwaving should be combined.

To achieve the right balance, the researchers carried out an experiment in which they specially designed a microwave fryer, monitoring temperature, pressure, volume, texture, moisture, and oil content of the chips. “We propose to combine the two methods in the same device. Traditional heating maintains crispness, while microwave heating reduces oil consumption,” the study concludes.

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Microsoft releases new AI models to expand further beyond OpenAI

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Mustafa Suleyman, CEO of Microsoft AI. (GeekWire File Photo / Kevin Lisota)

Microsoft is expanding its roster of in-house AI models, releasing a new speech-to-text system and making two existing models broadly available to developers for the first time.

The moves by Microsoft AI (MAI) are part of a broader effort by the company to expand its proprietary AI capabilities beyond its partnership with OpenAI, giving Microsoft more control over its own destiny in the competition against Google, Amazon, and others.

Microsoft announced MAI-Transcribe-1 on Thursday, a speech-to-text model that it says is the most accurate currently available. The company also released its existing voice and image generation models, known as MAI-Voice-1 and MAI-Image-2, for broad commercial use.

It’s Microsoft’s first major model release since a March reorganization, announced by CEO Satya Nadella, in which Microsoft AI CEO Mustafa Suleyman shifted away from day-to-day Copilot oversight to focus on frontier model development and superintelligence.

Suleyman told The Verge that the transcription model runs at “half the GPU cost of the other state-of-the-art models.” He told VentureBeat that the model was built by a team of just 10 people, and that Microsoft plans to eventually build a frontier large language model to be “completely independent” if needed.

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Microsoft also recently hired former Allen Institute for CEO Ali Farhadi and other top AI researchers from the Seattle-based institute to further bolster Suleyman’s team, as GeekWire reported last week.

MAI-Transcribe-1 is designed to handle noisy real-world conditions such as call centers and conference rooms, and Microsoft says it is testing integrations with Copilot and Teams. Microsoft says it offers the best price-performance of any large cloud provider, competing directly with OpenAI’s Whisper and Google’s Gemini on the FLEURS benchmark.

In a blog post, Suleyman called the model “not just the most accurate but also lightning fast.”

MAI-Voice-1 generates natural-sounding speech and now lets developers create custom voices from short snippets of sample audio. MAI-Image-2 ranks in the top three on the Arena.ai image generation leaderboard and is rolling out in Bing and PowerPoint.

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All three are available on the Microsoft Foundry developer AI platform and MAI Playground.

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‘You Guys Look Great’: Artemis Astronauts Share Earth’s Out-of-This-World Views

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It’s been more than 50 years since NASA astronaut Harrison Schmitt took the famous Big Blue Marble photograph, showing a breathtaking vision of Earth taken aboard the Apollo 17 spacecraft on its way to the moon. Now, as the four-astronaut crew of the Artemis II mission heads toward the moon, more spectacular images are being released.

This stunning photo is perhaps the most reminiscent of the Big Blue Marble, showing Earth in all its fragile, lovely glory.

“That’s us!” NASA wrote in a post. The post also quoted astronaut Christina Koch as saying of Earth, “You guys look great.”

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In a reply to questions on the post, NASA wrote, “Two auroras (top right and bottom left) are visible in this image. Zodiacal light (bottom right), is also visible, as well as airglow from Earth’s atmosphere.”

Another neat photo from the Artemis mission shows the planet neatly bisected, with one side lit up by the sun and the other in darkness.

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The Earth half in shadow as taken by the Artemis II crew

This image of the Earth was taken by one of the Artemis II crew out the Orion’s window.

Reid Wiseman/NASA

“You look amazing, you look beautiful,” Victor Glover, Artemis II pilot, said of the views of Earth in a video call with ABC News.

The Orion spacecraft and a half-moon shaped view of Earth in outer space

A view of the Earth from NASA’s Orion spacecraft as it orbits above the planet during the Artemis II test flight.

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Another intriguing image shows part of the spacecraft itself. USA Today noted that “the image appears to show the bottom of Orion’s service module where its main engine and auxiliary thrusters are housed.”

We’re tracking the 10-day Artemis II mission with a regularly updated blog.

Keep an eye on NASA’s image repository to see the latest photos.

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Tesla’s Texas factory workforce reportedly shrunk 22% in 2025

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The total workforce at Tesla’s factory outside Austin, Texas shrunk dramatically last year as the company suffered its second straight year of declining sales, according to a compliance report spotted by Austin American-Statesman.

Tesla went from employing 21,191 people at the factory in 2024 to 16,506 workers in 2025, a drop of 22%. That’s despite the company’s global workforce growing from 125,665 employees in 2024 to 134,785 employees in 2025, according to filings with the U.S. Securities and Exchange Commission.

It’s not clear which teams were most affected by Tesla scaling back its workforce at the plant. But the company has become one of the largest employers in the Austin area since it opened the factory in 2022. CEO Elon Musk also relocated Tesla’s headquarters to the factory in 2021 before it opened. The company has invested more than $6.3 billion in the facility to date, according to the new report.

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AirPods Max 2 teardown reveals nothing has changed beyond the H2 chip

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Though the AirPods Max 2 offer new features, a teardown of the headphones shows they’re still plagued by the same flaws of the original 2020 model.

Close-up of cushioned over-ear headphones in peach and orange tones resting on a dark textured fabric surface, showing mesh inside the ear cup and part of the headband
Apple’s AirPods Max 2 gained the H2 chip, but not much else.

Apple’s AirPods Max 2 debuted on March 16, with their core feature being the H2 chip. With it, Apple’s high-end headphones gained capabilities like Adaptive Audio, Conversation Awareness, and gesture controls, among others. Active Noise Cancellation was improved as well.
However, as explained in our review, the AirPods Max 2 are an iterative upgrade, that ultimately leaves something to be desired. New features and ANC enhancements aside, Apple effectively delivered more of the same with its AirPods Max 2.
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