Most loudspeaker designers don’t spend much time debating open versus closed the way headphone enthusiasts do. Cabinets are part of the equation for a reason, offering control, efficiency, and predictable performance. That’s the accepted playbook. But like any good rule in audio, someone is always trying to break it.

At AXPONA 2026, La Dolce Audio showed what happens when you ignore that playbook and lean into experimentation. Founder Terry Gesualdo isn’t approaching amplification or speaker design from a traditional standpoint, he’s part of a growing group of builders exploring open designs and current drive amplification as an alternative to the usual voltage driven norm.

I met Gesualdo on the shuttle ride over to the show, which feels about right. This isn’t a polished, corporate origin story, it’s the familiar path of someone who started by modifying gear, then building his own tube amps for himself, then for friends and family. The difference here is that he didn’t stop at tweaking circuits. He kept pushing until the results looked and sounded like something entirely his own.

Current Drive Tube Amplification: Why La Dolce Audio Isn’t Following the Script

Having built a few tube amps, I’m always curious to see what others are doing, and Terry Gesualdo is not following the usual path. Most of his designs are single ended pentode circuits, not triodes, and not push pull designs chasing more voltage swing. That choice alone puts him in a different lane than a lot of tube builders.

Where things really diverge is the move to current drive. Most amplifiers are voltage driven. That’s the standard approach across both solid state and tube designs. Current drive shows up more often inside DACs where signal levels are extremely small, and occasionally in headphone amplifiers, but rarely in loudspeaker systems where current demands are far higher.

The idea behind current drive is fairly straightforward. By controlling current instead of voltage, the amplifier reduces the impact of back EMF from the driver. That back EMF is the voice coil behaving like a generator as it moves through the magnetic field, feeding energy back into the amplifier. Reduce that interaction and, in theory, you reduce distortion and improve control over the driver.

It’s not a new concept, but it’s one that almost nobody is applying to loudspeakers in this way, especially with tube amplification. That’s what makes what La Dolce Audio is doing worth paying attention to.

Control Over Harmonics Instead of Chasing Purity

Circling back to that idea of ignoring the usual playbook, another aspect that reinforces how La Dolce Audio is taking a different path is the near exclusive use of pentode tubes instead of the more common triodes. Triodes are the simplest form of amplification with three active elements, anode, cathode, and grid. Fewer parts in the signal path is why many listeners and designers gravitate toward them. The assumption is less complexity means lower distortion and fewer unwanted artifacts.

But that’s only part of the story. Harmonic distortion doesn’t disappear just because the circuit is simpler. It just changes character. And not all harmonics are a problem. A lot of what people describe as tube warmth comes from second and third order harmonics, which many listeners actually prefer.

Terry Gesualdo leans into that reality rather than trying to avoid it. By using pentodes, which add additional control elements beyond what a triode offers, he can shape those harmonic structures instead of accepting whatever the circuit gives him. That includes adjusting the balance between second and third order harmonics and even their phase relationships.

It’s a different mindset. Instead of chasing the lowest possible distortion number, the goal is control over how that distortion presents itself, and giving the listener a way to fine tune the result.

Some will find that approach a bit sacrilegious. There’s a large part of the hobby focused on removing as much of this behavior as possible, chasing lower distortion numbers and cleaner measurements. That’s not the goal here.

La Dolce Audio leans into a different philosophy. “If it sounds good, do it” is more than a slogan. It reflects the idea that listening is subjective and that not every system needs to be locked into a single interpretation of neutrality. By giving users control over harmonic structure, the design puts some of that decision making back in the listener’s hands.

UA2.5 and UA2.5M: Modular Power and User Tunability

La Dolce Audio offers two amplifier paths built around the same core ideas but with different roles. The UA2.5 is a dual channel amplifier rated at roughly 3 to 5 watts depending on tube selection, and it’s where most of the flexibility lives. With 24 possible sound signatures, it gives the user direct control over how the amplifier presents harmonic content and overall character.

The UA2.5M monoblocks step things up in output, delivering around 9 watts per channel, but they take a more focused approach. They are designed to be paired with the UA2.5, which handles preamp duties and sound shaping. As a result, the monoblocks do not include the same tuning controls, focusing instead on providing additional power while maintaining the same underlying design philosophy.

HPA2.3 Headphone Adapter

Alongside its amplifiers, La Dolce Audio offers the HPA2.3 headphone “amplifier,” although that label needs a bit of clarification. It’s not an amplifier in the traditional sense. The HPA2.3 is a passive device designed to work with the UA2.5, relying on it for signal processing and gain. In practice, it converts the UA2.5 into a headphone amplifier rather than operating as one on its own.

That means the HPA2.3 can drive a wide range of headphones depending on how the UA2.5 is configured, but it cannot function independently. No preamp, no sound.

Pricing reflects that modular approach. The UA2.5, which serves as the foundation of the system, runs between $1,799 and $2,499 depending on configuration and tube selection. The UA2.5M monoblocks are $1,999 each, and the HPA2.3 adds another $599. A full system lands in the $3,500 range, depending on how far you go down the rabbit hole.

The Bottom Line

La Dolce Audio isn’t trying to fit into the usual mold, and that’s the point. In a category where a lot of designs feel like small variations on the same theme, this is a reminder that there are still different ways to approach amplification and system building.

Beyond the amplifiers, the partnership with ABX Audiophiles on Discord to offer open baffle speaker kits adds another layer. It invites listeners to get involved, not just as buyers but as participants, with a community that shares ideas, solves problems, and pushes designs forward together. We’ll have more on that ABX side of things in a forthcoming article.

It won’t be for everyone. If you want plug and play simplicity, this isn’t it. But if you’re the type who likes to understand what your system is doing and shape it to your preferences, La Dolce offers something most companies don’t. A system you can actually interact with, not just listen to.

For more information: ladolceaudio.com

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Unlike previous years in what TV nerds like me call the “brightness wars,” the U7SG doesn’t outblast its predecessor, but it’s not a problem. It gets around three times as bright as anything you can stream (which is naturally capped due to compression), and has enough firepower for all but the flashiest 4K HDR Blu-rays. Its color processing shows a little more restraint than in previous models. It’s not quite what I’d call “accurate to the director’s intent,” like the best TVs I test, but it does keep itself from blasting your eyeballs most of the time.

The high brightness is matched by deep black levels, without much of the “blooming” or “haloing” around bright objects that can dilute the contrast of many budget-friendly TVs. It’s not as striking as OLED TVs, which can control each of their millions of pixels on demand, but it’ll wow you in deep space scenes just the same. I was pleased that the TV’s odd local dimming issue didn’t crop up in real-world content, but the picture does tend to flatten shadows in dark scenes more than expected, even as the matte-like screen does a good job keeping reflections at bay.

Photograph: Ryan Waniata

There are some other notable flaws. Moving off to the TV’s side in my easy chair led to dimmer colors, washed-out contrast between the brightest and darkest images, and uneven backlighting, aka the “dirty-screen effect.” That stood out most in the green backdrop of the Masters on Sunday as Rory McIlroy held on for the win. It wasn’t an issue when viewing head-on, but even then, I noticed some dingy yellow lines along the screen’s left and right sides with light backgrounds. (I may not have noticed them much if I hadn’t been bombarding this TV with test content first.)

The U7SG still doesn’t feel quite like a premium model. But it’s a very clear, bright TV, and will feel more like it’s worth the money once RGB shows up on other Hisense models and the price on this one drops. If you want something brighter than a similarly priced OLED like the LG B5, the U7 is a great buy and has a few good upgrades over last year’s U75QG.

We’ll know more about the 2026 TV landscape once the new RGB TVs have landed, but if you need a powerful, classy-looking TV before then, the U7SG should be on your list.

A humanoid robot named Lightning completed the Beijing E-Town Half-Marathon today in 50 minutes and 26 seconds, beating the human world record by nearly seven minutes. The robot, built by Shenzhen Honor Smart Technology Development Co., navigated the 21-kilometre course autonomously, without remote control, using multi-sensor fusion and real-time decision-making algorithms. A second Lightning unit, this one remotely controlled, crossed the finish line even faster at 48 minutes and 19 seconds. The human half-marathon world record is 57 minutes and 20 seconds, set by Uganda’s Jacob Kiplimo in Lisbon on 8 March.

The robots and the roughly 12,000 human runners followed the same route but competed in separate lanes. The human race was won by Zhao Haijie of China in 1 hour, 7 minutes, and 47 seconds. The robot race was won by a machine that stands 169 centimetres tall, has an effective leg length of 95 centimetres designed to mimic elite human runners, generates 400 newton-metres of peak torque, and uses a proprietary liquid cooling system with a heat exchange flow rate exceeding four litres per minute, technology borrowed from Honor’s smartphone division.

The scale of the event

This was the second edition of the Robot World Humanoid Robot Games Half-Marathon, co-hosted by the Beijing Municipal People’s Government and China Media Group. The first, held on the same date last year, was riddled with mishaps. Only six of 21 robotic runners completed the course. Several stumbled, careened out of control, or simply lay down at the starting line. The winner, a Tiangong Ultra robot, finished in 2 hours, 40 minutes, and 42 seconds.

The 2026 edition was a different event in almost every respect. One hundred and twelve teams from 26 brands entered, fielding more than 300 individual robots, including five international teams from Germany, France, and Brazil. Roughly 40% of the teams competed in the autonomous navigation category, in which robots must navigate the course without human input. Remote-controlled teams had their net times multiplied by a 1.2 coefficient, a 20% penalty designed to encourage autonomous capability. All three podium finishers in the autonomous category were Honor robots, and all three posted times faster than the human world record.

The improvement from 2025 to 2026, from six finishers out of 21 to more than 100 teams competing with autonomous navigation, represents the kind of year-over-year progress that makes the event significant beyond spectacle. Lightning still collided with a barricade near the finish line and fell, requiring staff to help it back up before it completed the race. Another robot fell at the start line. But the failures were exceptions rather than the norm, a reversal from last year.

Who built the winner

Honor, the smartphone manufacturer spun off from Huawei in 2020, is the first major phone company to enter the humanoid robotics market. It unveiled its humanoid robot programme at Mobile World Congress on 1 March and committed $10 billion over five years to AI development. The company says Lightning’s running speed of four metres per second is 14% faster than Boston Dynamics’ Atlas. The entire development-to-marathon-entry process took one year.

Du Xiaodi, an Honor engineer on the winning team, said the competition’s value lies in technology transfer: “Looking ahead, some of these technologies might be transferred to other areas. For example, structural reliability and liquid-cooling technology could be applied in future industrial scenarios.” The race functions as a forcing function for locomotion, balance, navigation, and endurance, the same capabilities required for factory floors, construction sites, and eventually domestic environments.

China’s humanoid robot industry

The marathon is a showcase for an industry that China is building with the kind of coordinated state investment it previously applied to electric vehicles and solar panels. The 15th Five-Year Plan, covering 2026 to 2030, elevates robotics and “embodied intelligence” to one of the country’s top ten “new industry tracks.” The government has committed a one-trillion-yuan ($138 billion) state-backed fund to humanoid robots, industrial automation, and embodied AI. In February, the Ministry of Industry and Information Technology unveiled the “Humanoid Robot and Embodied Intelligence Standard System,” drafted by more than 120 research institutions and manufacturers, with a roadmap to push Chinese standards into ISO and IEC international adoption by 2028.

MIIT describes humanoid robots as “the next groundbreaking innovation following computers, smartphones, and new-energy vehicles.” The industry is projected to surpass 20 billion yuan ($2.8 billion) in scale by the end of this year. Chinese companies already dominate production. AGIBOT shipped more than 5,000 units in 2025. Unitree Robotics shipped 5,500. UBTech shipped more than 1,000 and plans to reach 5,000 this year and 10,000 in 2027. Chinese firms accounted for nearly 90% of global humanoid robot shipments last year. By comparison, Boston Dynamics, Figure AI, and Agility Robotics each shipped approximately 150 units.

The gap between running and usefulness

The question the marathon raises is whether speed on a road translates into capability in a factory or a home. Western humanoid robot companies, including Tesla with Optimus, Figure AI, and those supplying BMW, have emphasised dexterity and manipulation: picking up objects, assembling components, navigating cluttered indoor environments. Chinese companies have invested heavily in bipedal locomotion and speed, which produces more dramatic demonstrations but addresses a narrower slice of the problem.

The global humanoid robot market is projected to reach somewhere between $6.5 billion and $15 billion by 2030, depending on the research firm, with Goldman Sachs estimating $38 billion by 2035. The spread in projections reflects genuine uncertainty about how quickly robots that can run a half marathon will learn to do things that people will pay for. Industrial deployment is advancing: Figure 02 completed an 11-month pilot at a BMW plant, moving more than 90,000 components. But the gap between a controlled factory deployment and the kind of general-purpose humanoid robot that China showcased at its Spring Festival Gala remains wide.

Lightning’s 50-minute half-marathon is a genuine engineering achievement. A robot that navigates 21 kilometres autonomously, maintains balance at 25 kilometres per hour, manages thermal loads through liquid cooling, and recovers from a collision with a barricade has demonstrated capabilities that did not exist in any humanoid platform a year ago. The question is not whether the technology is impressive. It is whether the country investing $138 billion in it will find applications that justify the spending before the rest of the world catches up on a different approach to the same problem.

Photo credit: Autoblog
Seres developed an in-car toilet design that allows the system to fit inside an electric vehicle without taking up additional room. Engineers put the entire assembly on a movable rail connecting to the seat frame. When it is not needed, the toilet simply disappears beneath the floor. All it takes is a simple nudge or a whispered order, and it appears like a drawer.

Voice commands activate the system with a simple phrase that initiates the toilet function. Once you get access to it, the rest of the interior remains largely unchanged. A built-in fan draws in air and expels foul air through an exhaust pipe. Pee and other waste enter a tank, which must be manually emptied when you get at your destination. They include a small heating element inside that helps to dry everything up, making cleanup easier.

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The beauty of it is that when it’s not in use, nothing sticks out, allowing you to use the space for seating or storage. The patent filing cites extended journeys, camping vacations, and any time spent living in your car as the primary reasons for this functionality. Traffic delays that used to force you to make painful decisions are no longer as inconvenient. Seres already manufactures automobiles with features meant to make your daily commute easier. They compete in a market where each new model strives to be unique. This invention fits nicely into that approach by figuring out how to transform something you use every day into another part of the car.

There are still several technicalities to be sorted out before anyone can install this system in a real car. There is concern that scents may remain if the fan or seals fail to function properly when the unit is frequently utilized. Emptying the tank is also a bother, whether at the gas station or at home. If you’re sharing a car with a group of people, you might be afraid to take turns in such a small place, and there’s also the question of how well it will withstand all of the road’s bumps.

Seres hasn’t said whether they intend to manufacture any automobiles with this system in them. Patents don’t always come to fruition, therefore there’s a high risk this idea will go unnoticed. Nonetheless, it’s a creative solution to a problem that almost every driver has encountered at some point. If it ever gets it out of the design phase, road vacations may not be such a burden.
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Tesla is expanding its Robotaxi footprint across Texas by introducing availability in both Dallas and Houston. As announced in a post on X, the EV maker is rolling out its Robotaxis to small sections of the Texas cities, as detailed by two maps of its new service areas.

The first Robotaxi rides started in Austin, Texas where Tesla is headquartered, but the service’s launch was paired with a “Tesla Safety Monitor,” or a supervising human in the passenger seat. Earlier this year, Tesla began to transition away from including safety monitors, leaving its Robotaxis to operate unsupervised and fully autonomous. In the latest announcement on X, Tesla also showed off a 360-degree panning shot with no safety monitor, but the company hasn’t stated if its Dallas and Houston service will have in-car human supervision. It’s worth nothing that Tesla previously admitted that some of its Robotaxis are sometimes driven remotely by human operators.

With the Robotaxi expansion into Dallas and Houston, Tesla is encroaching on Waymo’s autonomous ride-hailing service that entered the same markets in February of this year. Looking ahead, Tesla is also targeting the Bay Area market in California for its Robotaxi expansion. While the company has received approvals to operate a ride-hailing service in California, it still doesn’t have authorization for autonomous taxis in the state yet.

Vacuuming is a chore, even if you use one of the best vacuums in Australia. If you want to make it as effortless as possible, investing in one of the best robot vacuums is the way to go.

The best robovacs available today are autonomous cleaners requiring minimal human intervention. They’re perfect for regular vacuuming and mopping, plus they can be scheduled for when you and the family will be away to minimise disrupting household activities.