ICEpower Breaks the Ice on a New Era of Class D Amplification

(May 20, 2026) Class D amplification has spent years shaking off old stereotypes. Once dismissed by some enthusiasts as devoid of character, the technology now powers everything from compact streamers to flagship amplifiers and active loudspeakers. ICEpower wants its latest design to push that evolution even further.

The company has announced its new SC400A2 amplifier platform alongside a companion universal power supply, the 750S, introducing what ICEpower calls its “Super Conductor” topology. According to the company, the architecture is designed to push Class D performance further by lowering noise and distortion while improving overall signal purity in compact amplifier designs.

At its core, the SC400A2 is a compact two-channel amplifier module capable of delivering 400 watts per channel into 4 ohms, or 800 watts bridged into 8 ohms. But the bigger story here isn’t raw power. It’s ICEpower’s argument that modern Class D amplification can now reach transparency levels once thought unattainable.

The Super Conductor architecture operates entirely in the analog domain, using a proprietary modulation system called GCOM (Globally Controlled Oscillation Modulator) paired with nested second-order negative feedback loops. The engineering goal is to correct signal errors directly in the analog domain while preserving timing precision and reducing distortion. In other words: amplify music without adding coloration or character of its own. The hardware itself also leans heavily into premium component selection. ICEpower says the design uses carefully selected capacitors, MOSFETs, resistors, and op-amps, with extreme attention paid to layout precision and signal integrity.

Measured performance figures are certainly eye-popping. ICEpower claims total harmonic distortion plus noise figures as low as 0.0002% at 100 watts across the audible band, along with a noise floor so low that the company says it had to develop new testing methods because traditional Audio Precision measurement gear became the limiting factor.

The companion 750S universal power supply was developed alongside the amplifier platform to simplify integration for manufacturers building products around the module. Rated for 750 watts continuous output with 1200-watt peak capability, the supply uses active power factor correction and a soft-switching LLC stage designed to minimize leakage current and system noise.

And that’s really the audience here. ICEpower isn’t selling finished amplifiers directly to consumers. These modules are intended for manufacturers building everything from high-end streaming amplifiers and active speakers to studio monitors and compact integrated systems. The pitch is straightforward: give brands a highly compact, reference-grade amplification platform without forcing them to spend years and enormous budgets developing their own Class D architecture from scratch. And given how widely ICEpower modules already appear across the audio world, there’s a good chance you may someday bring home a product powered by an SC400A2 module.

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[Mr.Satyre]

(assuming you're working off a press announcement)...this is kinda funny/peculiar to me. And, as always, please point me in the right direction if I'm misunderstanding something.

"Once dismissed by some enthusiasts as devoid of character..." combined with now being able to "...amplify music without adding coloration or character of its own."

As with CD when it first hit the market, Class D was dismissed by audiophiles precisely because it had no coloration or character of its own, and sounded to many people as being dry and clinical; something traditional analog amplifiers and associated electronics typically aren't known for for a multitude of factors. Now ICE is claiming that the very essence of Class D that was once perceived as bad is now good?

(as everyone here should know by now, I've always liked Class D, especially ICEpower modules, and never bought into the earliest arguments against Class D in general) (but that's me, and not necessarily anyone else)

 

[Sonnie Parker]

Yeah… that is pretty funny.

Of course, I’ve never really bought into the idea that most modern amps have a strong “character” or “coloration” of their own, at least not when they are competently designed and operated within their limits. Maybe some do, but I have not personally heard anything I could reliably point to and say, “That is clearly the amp,” apart from sighted impressions and subjective preference. Nonetheless... I think my McIntosh amps sound better because they look super cool.

Seriously, though, to me, if an amp is quiet, has enough power, handles the speaker load properly, and isn't clipping or doing anything odd, it should mostly get out of the way. After that, speakers, their placement, our listening position, room interaction, and recording quality usually dominate what we actually hear.

I somewhat understand why Class D had to fight the early reputation. Some early designs probably did deserve criticism. But modern Class D, whether ICEpower, Hypex, Purifi, etc., seems to have reached the point where the old “Class D sounds dry/clinical” blanket statement no longer holds up.

 

[Mr.Satyre]

Yeah… that is pretty funny.

Of course, I’ve never really bought into the idea that most modern amps have a strong “character” or “coloration” of their own, at least not when they are competently designed and operated within their limits. Maybe some do, but I have not personally heard anything I could reliably point to and say, “That is clearly the amp,” apart from sighted impressions and subjective preference. Nonetheless... I think my McIntosh amps sound better because they look super cool.

Seriously, though, to me, if an amp is quiet, has enough power, handles the speaker load properly, and isn't clipping or doing anything odd, it should mostly get out of the way. After that, speakers, their placement, our listening position, room interaction, and recording quality usually dominate what we actually hear.

I somewhat understand why Class D had to fight the early reputation. Some early designs probably did deserve criticism. But modern Class D, whether ICEpower, Hypex, Purifi, etc., seems to have reached the point where the old “Class D sounds dry/clinical” blanket statement no longer holds up.

I've always maintained it's not the amp per se, but the all the other devices in the chain: caps, PSUs, rails, etc. Early Class D did have a little more distortion, which I think gave everything played through them a harder edge, but again, not that significant in my opinion.

 

[Todd Anderson]

(assuming you're working off a press announcement)...this is kinda funny/peculiar to me. And, as always, please point me in the right direction if I'm misunderstanding something.

"Once dismissed by some enthusiasts as devoid of character..." combined with now being able to "...amplify music without adding coloration or character of its own."

As with CD when it first hit the market, Class D was dismissed by audiophiles precisely because it had no coloration or character of its own, and sounded to many people as being dry and clinical; something traditional analog amplifiers and associated electronics typically aren't known for for a multitude of factors. Now ICE is claiming that the very essence of Class D that was once perceived as bad is now good?

(as everyone here should know by now, I've always liked Class D, especially ICEpower modules, and never bought into the earliest arguments against Class D in general) (but that's me, and not necessarily anyone else)

Oh… that’s my wording and it does seem to contradict itself. I was really trying to elude to the fact that Class D had an early reputation of lacking warmth. The latter tidbit, wasn’t meant to play off the earlier.

Probably a poor setup on my part!

 

[Mr.Satyre]

Oh… that’s my wording and it does seem to contradict itself. I was really trying to elude to the fact that Class D had an early reputation of lacking warmth. The latter tidbit, wasn’t meant to playoff the earlier.

Probably a poor setup on my part!

Oh, okay. All's good then!

 

[Sonnie Parker]

I guess we can forgive you this one time.

 

[Onetrack97]

(assuming you're working off a press announcement)...this is kinda funny/peculiar to me. And, as always, please point me in the right direction if I'm misunderstanding something.

"Once dismissed by some enthusiasts as devoid of character..." combined with now being able to "...amplify music without adding coloration or character of its own."

As with CD when it first hit the market, Class D was dismissed by audiophiles precisely because it had no coloration or character of its own, and sounded to many people as being dry and clinical; something traditional analog amplifiers and associated electronics typically aren't known for for a multitude of factors. Now ICE is claiming that the very essence of Class D that was once perceived as bad is now good?

(as everyone here should know by now, I've always liked Class D, especially ICEpower modules, and never bought into the earliest arguments against Class D in general) (but that's me, and not necessarily anyone else)

I disagree, CD’s were bad, not because they were accurate, because the entire chain was very poor. Yes, 44 kHz was marginal but poor ADC’s, DAC’s, and mixing engineers that really didn’t know enough.

 

[Mr.Satyre]

I disagree, CD’s were bad, not because they were accurate, because the entire chain was very poor. Yes, 44 kHz was marginal but poor ADC’s, DAC’s, and mixing engineers that really didn’t know enough.

Most of the masters CDs were made from even then were 44.1kHz, and 44.1 is plenty. The Philips Crown AAA is still exceptional. I have quite a few 1st gen CDs that sound fantastic.

 

[Mr.Satyre]

Most of the masters CDs were made from even then were 44.1kHz, and 44.1 is plenty. The Philips Crown AAA is still exceptional. I have quite a few 1st gen CDs that sound fantastic.

 

[Onetrack97]

Go back and listen to that CD with an early 1980’s CD player.

 

[JStewart]

Early Class D did have a little more distortion,

And wasn’t it more so in the treble and that’s what gave the harshish sound?

 

[ddude003]

I think the lack of even-order harmonic distortion and/or maybe the lack distortion in general, makes some of these super clean, distortion wise kits some what boring to the human ear...

I have this going on with my Chord DAC... Very clean and incisive... And boring without some tube warmth to knock the digital edges off the bits and bytes... Now sounds beautiful and musical when followed by a tubed preamp...

@JStewart, Harshish maybe being too Sharp and/or Bright? Maybe odd-order harmonics?