HPA-S400ET review by Michael Andrew

Posté le 2024-01-31 Tests & reviews, HiFi Tests 2444
HPA-S400ET picture

Read Michael Andrew's review of the Audiophonics Workshop HPA-S400ET power amplifier. The Audiophonics HPA-S400ET is a Class D power amplifier based on the use of two Purifi 1ET400 modules, enabling it to deliver 2x 400W power at 4 ohms. This amplifier is designed with a dual-mono structure, with one Purifi amplifier module per channel, to process the signal in the best possible way. In addition to its considerable power reserve, the HPA-S400ET demonstrates exemplary linearity for clear, precise and rich sound reproduction. This power amplifier will enable you to drive demanding speakers, whether for large room PA or professional studio applications. The HPA-S400ET is powered by a high-efficiency, low-noise HYPEX SMPS1200A400 switch-mode power supply capable of delivering a rated power of 1200W. In addition, an interface card allows 3 different jumper-adjustable gain settings to be configured, adapting the amplifier's use to various situations. The whole unit is housed in a sturdy aluminum case with vents and heat sinks for optimum heat dissipation, as well as simple, elegant curves. Last but not least, you'll find the usual connectivity on the back of the case, with RCA input, balanced XLR input and output on speaker terminals, complemented by two 5-12V Trigger connectors.

HPA-S400ET picture

AUDIOPHONICS HPA-S400ET

Power Amplifier Class D Stereo Purifi 1ET400A 2x400W 4 Ohm

Discover the AUDIOPHONICS HPA-S400ET

What does Michael Andrew think of the HPA-S400ET?

"I've never experienced a Class D amplifier like this. It takes a lot of energy to drive Infinities speakers, and this amplifier had no problem doing it. The midrange is clear enough to bring out the vocals, the bass is fantastic and the highs are simply perfect! The HPA-S400ET offers a sound reproduction with a natural warmth superior to some class A/B amplifiers, which is quite surprising for a class D!"

Audiophonics HPA-S400ET highlights according to Michael Andrew:

  • Elegant design and speaker terminals with carbon body and gold plating
  • Two Purifi 1ET400 high-fidelity amplifier modules
  • A proprietary interface card with the option of changing AOPs
  • A low-noise SMPS power supply recognized in the audio world for its performance and quality
  • Excellent ratings by Audio Science Review
Photo of PURIFI 1ET400 modules
Photo of HYPEX SMPS1200A400 power supply
Photo of gain adjustment interface
Rear view of the HPA-S400ET

To find out more take a look at
Audio Scien Reviews test of the HPA-S400ET

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