AUDIOPHONICS HPA-S400ET SPARKOS EDITION Stereo Class D Amplifier Class D Purifi 2x400W 4 Ohm

Audiophonics HPA-S400ET Amplifier Class D Stereo Purifi 2x400W 4 Ohm
We are proud to offer the AUDIOPHONICS HPA-S400ET SPARKOS EDITION, a stereo class D power amplifier based on two PURIFI 1ET400A modules and SPARKOS OPA and regulators. This ready-to-use version is designed for audiophiles needing a foolproof amplification solution, with a considerable power reserve as well as impeccable linearity. The PURIFI modules are indeed among the most rigorous Class D amplification solutions on the market, with simply exceptional measured performance.

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This device is supplied as standard in 230V. If you need 110V input voltage, please specify it clearly in the comment field when ordering.

AUDIOPHONICS HPA-S400ET SPARKOS EDITION

Power Amplifier PURIFI 2x400W 4 Ohm




We are proud to offer the AUDIOPHONICS HPA-S400ET SPARKOS EDITION, a stereo class D power amplifier based on two PURIFI 1ET400A modules and SPARKOS PDUs and regulators. This ready-to-use version is designed for audiophiles needing a foolproof amplification solution, with a considerable power reserve as well as impeccable linearity. The PURIFI modules are indeed among the most rigorous Class D amplification solutions on the market, with simply exceptional measured performance.

This device offers high level sound reproduction which will be suitable to drive demanding speakers, to sonorize large listening rooms or for studio applications requiring a considerable headroom without compromising on the precision and richness of the audio message.

All of the components are integrated in a sober and robust 100% Aluminum housing with openings and heatsinks to help heat dissipation. Its design also allows it to block signal interference.

Dual PURIFI 1ET400A module

  • Both channel of the amplification circuit uses its own PURIFI 1ET400A module. These high performance Class D amplifier circuits each offer a very comfortable power of 200W (@ 8Ω) while making the most of Class D amplifiers high efficiency rating.
  • The 1ET400A modules has a >75dB high gain loop over the entire frequency band, providing high performance across the whole spectrum and surpassing any amplifier regardless of its class.
  • Thanks to hyper-low intermodulation distorsion (IMD) the HPA-S400ET achieves incredible precision on its stereophonic image over the whole spectrum, unmatched by audio amplifiers of any technology or operating class.
  • THD remains extremely low at any frequency and any power level right until clipping. This translates into a total lack of sonic signature, and an ability to reproduce any type of music without preference for genre or production style.
  • The output noise is negligible, which allows deep silences and prevents losing details when listening at low volume.
  • The circuit benefits from a high level of rejection (PSRR) which minimizes the impact of power supply on audio performance.
  • Load-invariant frequency response and negligible output impedance enables the HPA-S400ET to drive the most demanding speakers with ease.
  • Very low idle losses and reduced electromagnetic interference (EMI). The High loop gain allows relaxed timing of the power MOSFETs without degrading audio performance.
  • The HPA-S400ET uses these amplifier modules with an interface card specially developed for optimal integration.

Power Module Hypex SMPS1200A400


The SMPS1200 switching power supply is a model with very high maximum output power of 1200 Watts. It has been specifically designed and developed by Hypex to provide 2 x 64V voltage required for operation of the most demanding amplifier modules.

This low noise high quality Power supply, meets every energy needs of the amplification modules.

AUDIOPHONICS HPA-S400ET SPARKOS EDITION Amplificateur Stéréo Class D Purifi 2x400W 4 Ohm

Audiophonics Interface Board : Sparkos Labs OPA & Regulators

The two modules are driven in opposite phase, to cancel the "Power Supply Pumping" effect. This allows a greater stability of the power supply, distributing alternately on each rail the current calls, and thus increasing its capacities.

We opted for a two-level voltage regulation to optimize the power supply to the PDUs and the auxiliary voltage supplied to the modules. In this Sparkos Edition, no less than four Sparkos Labs SS7915 and SS7815 discrete voltage regulators are used. These easily outperform all monolithic TO-220 format regulators in terms of output noise, transient response and load regulation.

Two Sparkos Labs SS3602 dual discrete PDUs are also used. These Sparkos PDUs are more efficient than the LM4562s of the standard HPA-S400ET and offer lower noise and higher output current with Class A bias. The PDUs are mounted on a DIP8 socket, allowing replacement if necessary.

To suit all uses, we have opted for three gain settings, switchable by jumper on the interface board:

  • Gain of +7.2dB, i.e. a total of 20dB  - Max power reached with a signal of ~4.2V RMS
  • Gain of +12.5dB, that is to say a total of 25.3dB (by default) - Max power reached with a signal of ~2.25V RMS.
  • Bypass : In this case, the signal goes directly from the inputs to the modules, allowing the lowest possible gain of 12.8dB. This mode can be interesting when using a vigorous preamplifier, capable of driving a 2 to 4kΩ load and reaching a voltage of ~10V RMS.

Connectivity


Designed for easy integration, the HPA-S400ET has a balanced stereo (XLR) and unbalanced (RCA) input. Bipolar selectors make it easy to change the input source and even allow independent channel control.

On output side, BP-207 Carbon / Gold 24K Ø5.5mm speaker terminals ensure excellent connection with the speakers.

A trigger module allows the amplifier to be switched on automatically from a distance. This is compatible with voltages from 5 to 12V.

THD+N

Frequency response

THD vs Freq

Specifications
Product typePower Amplifier
Output power (max)8Ω @1%THD : 227W
4Ω @1%THD : 425W
2Ω @1%THD : 450W
Inputs1x Single-ended stereo RCA
1x Balanced stereo XLR
1x Trigger 12V
SortiesSpeaker terminals
1x Trigger 12V
Trigger2x trigger 5-12V on Jack 3.5mm connectors
THD+NPO=1W, f=1kHz 0.0007 %
PO=10W, f=1kHz 0.00026 %
PO=100W, f=1kHz 0.00015 %
PO=1W, f=20-20kHz 0.0007 %
PO=10W, f=20-20kHz 0.00029 %
PO=100W, f=20-20kHz 0.00017 %
IMD (CCIF)PO=1W, f=18kHz+19kHz 0.00025 %
PO=10W, f=18kHz+19kHz 0.00022 %
PO=100W, f=18kHz+19kHz 0.00027 %
IMD (DIM)PO=1W, DIM30 0.002 %
PO=10W, DIM30 0.002 %
PO=100W, DIM30 0.002 %
Idle noiseA-weighted 11.5 µV
Dynamic rangeA-weighted 4Ω 131 dB
SNRA-weighted 4Ω 131 dB
Frequency responseRL= 8Ω, f= 20-20kHz ±0.01 dB
RL= 4Ω, f= 20-20kHz ±0.01 dB
RL= 2Ω, f= 20-20kHz ±0.01 dB
Output impedance1kHz, Iout=1A 0.07 mΩ
20-20kHz, Iout=1A <0.65 mΩ
Input impedanceRCA: 47kΩ / XLR: 94kΩ
Bypass: 2.2 / 4.4 
General
Supply voltage230V (110V on demand)
Dimensions413 x 322 x 60mm
Weight5.63 kg
Housing materialAluminum
ColorBlack
 
Data sheet
InputXLR
InputRCA
OutputSpeaker terminal
ColorBlack
ChannelDual Mono
Light symbolYes
ClassClass D / T
HeatsinkYes
Fuse holderYes
Amplifier chipPurifi 1ET400A
Power (W)400.0
 
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1 reviews
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Etonnante construction personnalisée avec Purifi
Je suis étonné par l'ensemble de l'équipement en lui-même. Le prix est vraiment compétitif par rapport à d'autres installations similaires basées sur la Purifi, mais c'est la bonne réputation qu'Audiopohics s'est construite qui m'a poussé à commander cet ampli... Et bon sang, je ne me suis même pas trompé d'un centime !
Puisque la perception du son est une question tellement subjective, je ne soulignerai que la propreté du son et la quantité incroyable de détails que je peux obtenir sur mon installation (KEF R3 + Audio Matrix Mini-i Pro 3). Chéry au sommet : où est passé le manque de basses percutantes des amplificateurs Class-D ? Est-ce une blague ? Je ne peux pas dire à quel point je suis satisfait de mon achat pour l'instant. Dois-je mentionner que la consommation électrique murale est de 20W ? Laisse-le jouer, bébé ! Et félicitations à Audiophonics pour votre merveilleuse construction : matériaux de premier choix, fabrication de premier ordre, spécifications de premier choix et plaisir musical de premier ordre!
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This review has been posted for AUDIOPHONICS HPA-S400ET SPARKOS EDITION Stereo Class D Amplifier Class D Purifi 2x400W 4 Ohm
 
AUDIOPHONICS HPA-S400ET SPARKOS EDITION Stereo Class D Amplifier Class D Purifi 2x400W 4 Ohm
We are proud to offer the AUDIOPHONICS HPA-S400ET SPARKOS EDITION, a stereo class D power amplifier based on two PURIFI 1ET400A modules and SPARKOS...

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