The Amplifier So Clean ICEpower Had to Invent New Measurement Tools to Prove It Worked
ICEpower Audio has announced the SC400A2, a 400W 2-channel Class-D amplifier module that the company says is so clean the industry-standard measurement gear could not capture its noise floor. Audio amplifiers work by taking a signal and making it louder — Class-D is a type that uses switching transistors rather than continuous current, which makes them efficient and compact. ICEpower's version is so distortion-free that the company had to build its own measurement tools because off-the-shelf gear designed to characterize exactly this kind of product could not read what was in front of it. According to hi-fi+, ICEpower claims the new Super Conductor topology achieves 0.0002% total harmonic distortion plus noise at 100W across the audible band — a figure so low that Audio Precision's platform — the model ICEpower declines to specify — became the limiting factor in characterization. ICEpower describes the work-around in general terms: purpose-built testing hardware developed internally, with specifics the company has not published. No third party has yet verified the result.
The 0.0002% figure will face that test soon. Audio Science Review routinely puts Class-D amplifiers on the bench and has challenged ICEpower's numbers before. If the measured result holds, the measurement-tool angle stands. If it doesn't — if ASR finds the noise floor is measurable but higher than claimed — the infrastructure story about why verification is hard is still true, but ICEpower's position in it changes.
The SC400A2 is the first product built on ICEpower's Super Conductor topology, an analog Class-D design the company spent years developing to solve a specific feedback-loop problem that had limited previous designs. Per rAVe PUBS, components were chosen without compromise: the best available capacitors, MOSFETs, resistors, and op-amps, with layout precision treated as a first-order constraint.
Patrik Bostrøm is CTO. Per hi-fi+, he is a pioneer in Class-D technology and original founder of Anaview — which ICEpower acquired via its 2016 purchase of Audio Bricks. He is direct about what forced the development: what triggered the development of this new superconductor technology was the work that competitors Purifi Audio of Denmark and Hypex of the Netherlands have done, per AV Nirvana. Purifi's Eigentakt topology, designed by Bruno Putzeys — who also designed Hypex's core architecture — has been widely regarded in the audiophile engineering community as the current performance ceiling for Class-D amplification. The ASR forum community generally rates Purifi as technically ahead of ICEpower in recent years. The SC400A2 is ICEpower's answer.
The performance ceiling is not academic. For manufacturers building high-end audio products around reference-grade modules, the Purifi benchmark has been the target to beat for years. According to rAVe PUBS, the integration pitch is straightforward: skip the amplifier R&D, spec the module, ship the product. When ICEpower claims to have cleared that bar, it changes what "reference grade" means for every manufacturer in the supply chain — not as marketing positioning, but as a specification constraint they now have to account for.
The 750S Universal Power Supply launches alongside: 750W continuous, 1200W peak, active power factor correction and soft-switching LLC topology designed to keep leakage current low. Per rAVe PUBS, the SC400A2 delivers 800 watts bridged into 8 ohms. Both modules target manufacturers — streaming amplifier brands, active speaker makers, studio monitor manufacturers — who want reference-grade performance without building the amplification stage from scratch. The pitch is time-to-market: skip years of R&D, integrate a module.
The demo is running at High End Vienna, which opens June 4.
The measurement-infrastructure angle is the story. When the gear designed to quantify clean reaches its own noise floor, the definition of clean shifts for everyone downstream. Any manufacturer currently qualifying audio subsystems around a -120dB noise floor target has just had that target become inadequate — not because the goal changed, but because the reference point did. Manufacturers building integration around reference-grade modules will need to revisit their own verification methodology, or accept that their qualification standard is now calibrated to a tool that cannot capture what it claims to measure. ICEpower did not just ship a better amplifier. They shipped a problem for everyone who has to verify what they already shipped.