SC400A2: A New Benchmark in Class-D Amplifier Modules
ICEpower’s SC400A2 is a 2-channel, 400W Class-D amplifier module engineered specifically for premium audio amplification. Built on the company’s new super conductor topology, it targets high-end hi-fi products, streaming amplifiers, studio monitors, and active loudspeakers that demand both power and refinement. The module delivers an exceptionally low total harmonic distortion plus noise figure of 0.0002% at 100W across the full audio band, with a noise floor so low that it challenges conventional measurement setups. This performance aligns the SC400A2 not just with the best Class-D solutions, but with the most respected linear amplifiers—while retaining Class-D’s efficiency and compact footprint. Physically, the 80×100 mm module gives designers ample output in a form factor suited to slim, minimalist enclosures. For manufacturers, it presents a turnkey Class-D amplifier module that can anchor next-generation premium audio components without compromising sonic transparency.
Inside the Super Conductor Topology
The super conductor topology at the heart of the ICEpower SC400A2 is built around a completely analog signal path and best-in-class components. At its core lies the company’s Globally Controlled Oscillation Modulator (GCOM), surrounded by a nested feedback architecture using two second-order integrator stages. When combined, these elements effectively form a fourth-order integrator that is merged with the output filter of the Class-D amplifier. While this may sound straightforward on paper, the implementation is technically demanding: stability, noise, and linearity must all be carefully balanced. The payoff is a smooth frequency response extending to a -3 dB point beyond 100 kHz, ensuring wideband accuracy and minimal phase shift in the audible range. ICEpower positions the module as a “conductor with gain,” emphasizing the goal of delivering pure amplification without coloration—akin to a lossless superconductor in physics, but applied to audio.
Addressing Traditional Class-D Limitations for High-End Audio
The SC400A2 is ICEpower’s answer to long-standing criticisms of Class-D technology in high-end audio, particularly concerns about noise, distortion, and sonic character. Inspired partly by the advances of notable competitors, ICEpower’s engineering team set out to create what they describe as their best amplifier yet. The super conductor topology directly tackles typical Class-D challenges: the nested feedback and GCOM-based modulation scheme suppress switching artifacts, minimize distortion, and maintain linearity across the full band. By choosing top-tier capacitors, op-amps, resistors, and MOSFETs, the design reduces component-induced coloration and enhances stability. The result is a Class-D amplifier module that behaves more like an ultra-clean linear stage from the listener’s perspective while retaining high efficiency and compact size. For premium audio amplification, this means designers no longer need to trade-off between power density and perceived transparency.
From Lab to High End Vienna: A Milestone for ICEpower
After years of development, the public debut of the ICEpower SC400A2 at High End Vienna marks a significant milestone for the company’s Class-D roadmap. The launch signals not just a new product, but the introduction of a broader super conductor platform intended to anchor future modules and customized solutions. ICEpower has a history of collaborating closely with manufacturers, and the SC400A2 continues that approach by offering a reliable, flexible base for bespoke designs. The module’s compact footprint and high performance are tailored to modern audio products that must combine discreet aesthetics with serious power reserves. For audio brands, the unveiling demonstrates that Class-D amplifier modules can now credibly serve as the core of true high-end systems, and that ICEpower is positioning itself at the forefront of this shift with a topology designed specifically for transparent, reference-grade listening.
A Complete Platform with the 750S Power Supply
To unlock the full potential of the ICEpower SC400A2, the company pairs it with the 750S power supply module, creating a complete, high-efficiency platform. The 750S is a compact universal-mains PSU capable of delivering 750 watts, combining a power factor corrector (PFC), an LLC resonant converter, and an auxiliary converter providing more than 20 watts for DSP and front-end electronics. The PFC ensures that current draw from the AC line is smooth and reduced in RMS value, minimizing interference with other devices and making the supply effectively “invisible” to the mains. The LLC converter limits noise transfer from primary to secondary, while careful transformer design reduces capacitance and enables the use of lower Y-cap values, thereby cutting low-frequency noise. Together, the SC400A2 and 750S give manufacturers a compact, low-noise, high-power foundation for building world-class, feature-rich audio components.