1ET400A Eigentakt Amplifier module

The 1ET400A is a single-channel, ultra-high performance, analog-input Class D amplifier module capable of over 400W of power and provides an audio quality level that sets the standard for power amplifiers of any operating class.

Highlights

• Single-channel, analog input
• Negligible THD and IMD
• Extraordinary low noise
• Load-invariant response
• Exceptionally clean clipping
• Low losses & high efficiency
• Small formfactor 

Product details

PURIFI 1ET400A | Eigentakt | Amplifier Module

This high-performance amplifier module is based on the Eigentakt technology from PURIFI. The 1ET400A is one of the most high-end options from our amplifier module category. Eigentakt is the implementation of PURIFI’s continuing research into nonlinear control theory that produced the first mathematically exact largesignal model of self-oscillating amplifier controllers. This breakthrough allows complete optimization of the feedback circuit and improves performance by at least an order of magnitude over existing implementations. The Eigentakt technology allows for extreme low THD at any frequency and power level. The negligible IMD (intermodulation distortion) creates a highly resolved and stable stereo image. Thanks to the very low output noise, this exceptional performance is preserved even at low listening levels.

The 1ET400A also features a comprehensive protection system that makes it robust and easy to integrate. 

Features

• High loop gain (>75dB) in the entire audio band
• Negligible Intermodulation Distortion (IMD)
• THD remains extremely low at any frequency and any power level
• Negligible output noise
• High power supply rejection ratio (PSRR)
• Controlled, second-order low-pass response

What’s In The Box?

• 1ET400A amplifier module 

The 1ET400A module requires attention on the power supply and signal input connections. We recommend to use a dedicated front-end module that provides a buffered input and handles the power supply connections. PURIFI developed the FE02 stereo front-end module for this purpose. This module enables an evaluation setup but is also suitable for DIY applications. The FE02 front-end module is supplied with the PURIFI EVAL1 kit available on this page.

Specifications