PURIFI 1ET400A | Eigentakt | Amplifier Module

The PURIFI 1ET400A 1x425W Eigentakt Amplifier Module represents a paradigm shift in high-fidelity audio amplification, delivering studio-grade performance in a remarkably compact form. This single-channel module is engineered for discerning audiophiles, DIY enthusiasts, and professional system integrators who demand absolute sonic purity without compromise. Whether you are building a reference-grade stereo system, upgrading an existing multi-channel setup, or designing active loudspeakers, the 1ET400A provides a pristine amplification foundation that reveals every nuance of your music.

At the heart of this module lies PURIFI’s revolutionary Eigentakt topology, a self-oscillating Class D design that achieves unprecedented levels of linearity and efficiency. Rated at 425 watts into 4 ohms, 227 watts into 8 ohms, and 450 watts into 2 ohms, it effortlessly drives demanding loudspeakers with authority and control. The extraordinary signal-to-noise ratio of 131 dB ensures an utterly black background, while the 12.8 dB gain and 25-amp current limit guarantee stable operation even under challenging loads. Measuring just 82 x 63 x 35 mm with M3 mounting holes on a 75 x 56 mm grid, this module integrates seamlessly into custom enclosures via its pin-header input and output connectors. With near-unity efficiency and vanishingly low distortion, the 1ET400A sets a new benchmark for compact, high-performance amplification.