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AUDIOPHONICS HPA-DM750ET Power Amplifier Purifi 1ET9040BA

The Audiophonics HPA-DM750ET is a Class D power amplifier featuring dual mono architecture. Integrating two Purifi 1ET9040BA amplifier modules and two independent Hypex SMPS1200A180 power supply boards, it is capable, with incredible ease, of delivering 2x750W into 4Ω or 2x375W into 8Ω, while offering exceptional richness and precision for a musical experience on a whole new level.

Average votes for this product
5.0 / 5
  Based on 13 customers reviews.

By buying this product you get 259 loyalty points


Reference : 18943
New product

2 590,00 €tax incl.

2 158,33 € tax excl.
Including 0,05 € for green tax

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Shipping date: 11-09-2026.

Orders placed before 12h (GMT+1) will generally be shipped the same day (working day).

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2 Years warranty
 
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Audiophonics Workshop amplifiers range

Audiophonics HPA-DM750ET Power Amplifier Dual Mono Class D Purifi 1ET9040BA 2x750W 4 Ohm

Audiophonics HPA-DM750ET : Front view


The Audiophonics HPA-DM750ET is a Class D power amplifier featuring dual mono architecture. Integrating two Purifi 1ET9040BA amplifier modules and two independent Hypex SMPS1200A180 power supply boards, it is capable, with incredible ease, of delivering 2x750W into 4Ω or 2x375W into 8Ω, while offering exceptional richness and precision for a musical experience on a whole new level.

This Audiophonics HPA-DM750ET amplifier will integrate seamlessly into the vast majority of HiFi systems, and can even accompany the most demanding loudspeakers.

All components are housed in a solid aluminum case, sober and modern. The design of the housing also ensures efficient heat dissipation, considerably reducing the impact of interference on the signal.

Audiophonics HPA-DM750ET : Key features
Audiophonics HPA-DM750ET : Purifi 1ET9040BA Amplifier Modules

Audiophonics HPA-DM750ET : Two Purifi 1ET9040BA modules in a true dual-mono architecture

Purifi's latest Class D amplifier module, the 1ET9040BA, once again represents an exceptional solution, capable of delivering both high power and very low noise levels and incredible linearity. It's based on EIGENTAKT's proprietary second-generation amplification technology, ensuring perfectly transparent sound reproduction, respecting every detail of the audio signal. Performance correlated with impeccable measurements, both in terms of THD and IMD.

The Audiophonics HPA-DM750ET power amplifier features two Purifi 1ET9040BA modules in a dual-mono architecture, delivering 750W per channel at 4Ω while greatly reducing interference and distortion.

Audiophonics HPA-DM750ET : Hypex SMPS1200A180 power supply modules

The Hypex SMPS1200A180 switched-mode power supply is an ultra-high-efficiency model capable of developing a rated power of 1200 Watts in a compact footprint. It has been specifically designed and developed by Hypex to supply the 2 x 46V voltage required to operate the most demanding amplifier modules.

This high-quality, low-noise power supply meets the power requirements of the amplifier modules in every respect. What's more, the amplifier modules themselves have an excellent ability to reject power supply noise. As a result, the HPA-DM750ET is extremely insensitive to imperfections in the power supply network, and to voltage/current variations that can cause parasitic noise.

The Audiophonics HPA-DM750ET benefits from a truly dual-mono architecture, incorporating two Hypex SMPS1200A180 power supply modules, each responsible for efficiently and cleanly powering a Purifi 1ET9040BA amplifier module.

Audiophonics HPA-DM750ET : Hypex SMPS1200A180 power supply module

Audiophonics HPA-DM750ET : Proprietary interface "Buffer" board

One Texas Instrument OPA1656IDR OPA per channel is used. These are very low distortion AOPs offering the greatest transparency with very low THD. They are mounted on a socket allowing them to be replaced if necessary.

To suit all uses we have opted for 4 gain settings: +16.55dB (x6.72) / +22.7dB (x13.64)  / +28.75dB (x27.38) / 30.8dB (x34.67).
Settings available under the device.

Audiophonics HPA-DM750ET : Balanced and unbalanced connectors

The Audiophonics HPA-DM750ET power amplifier features simple but effective connectors for the vast majority of applications. Inputs include unbalanced RCA and balanced XLR. Output is simply via speaker terminals. A double trigger is also present (input and output), enabling the amplifier to be integrated into an automated on/off chain.

Audiophonics HPA-DM750ET : Connector diagram
1ON/OFF button
2Right channel balanced XLR input
3Right channel input switch
4Right channel single-ended RCA input
5Right channel speaker output
6Power connector
7Trigger input
8Trigger output
9Left channel speaker output
10Left channel balanced XLR input
11Left channel input switch 
12Left channel single-ended RCA input

THD vs Frequency @ 4Ω

Audiophonics HPA-DM750ET : THD vs Frequency measurement


THD+N vs Output power @ 1kHz

Audiophonics HPA-DM750ET : Mesure de THD+N vs Puissance


Frequency response @ 2.83V

Audiophonics HPA-DM750ET : Frequency response measurement

Technical characteristics

Specifications
Product typePower amplifier
Number of channels2
Amplification typeClass D dual mono
Amplification modules2x Purifi 1ET9040BA
Output power (@ THD 1%)2x 375W @ 8Ω, 0.1% THD 
2x 750W @ 4Ω, 0.1% THD
2x 1200W @ 2Ω, 0.1% THD
InputsBalanced XLR
Single-ended RCA
OutputsSpeaker terminals
Gain / Sensitivity16.55dB - 4.07V
22.7dB - 2V
28.75dB  - 1V
30.8dB - 0.775V
THD+N0.0003% @ 1W, 1kHz
0.0001% @ 10W, 1kHz
0.00006% @ 100W, 1kHz
0.000045% @ 400W, 1kHz

0.0003% @ 1W, 20Hz-20kHz
0.0001% @ 10W, 20Hz-20kHz
0.00015% @ 100W, 20Hz-20kHz
0.0001% @ 400W, 20Hz-20kHz
IMD0.0001% @ 1W, 18.5kHz+19.5kHz
0.0001% @ 10W, 18.5kHz+19.5kHz
0.0001% @ 200W, 18.5kHz+19.5kHz
Dynamic range140dB(A)
Output noise4.5µV(A)
Efficiency96% @ 1kHz, 750W, 4Ω
Output current40A
General
Supply voltage110-230V (switchable)
Total dimensions (WxDxH)435 x 355 x 73mm
Idle power0.1W
Weight4.8kg
Package1x Audiophonics HPA-DM750ET
1x Power cable
 
Data sheet
InputRCA
InputXLR
OutputSpeaker terminal
ColorBlack
Channel2 (Stereo)
ChannelDual Mono
ClassClass D / T
Amplifier chipPurifi 1ET9040BA
Power (W)750
Remote ControlNo
 
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Average votes
5.0 / 5
13 reviews
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Note :
 5/5
Date :
Expecting the best - getting the most fabulous
WOW!
This piece really suprised me.
The rectifying wire has been invented!
Look at those Frequency Response diagram - completely flat from 20Hz to 50KHz.
This amplifier replaced 2 Hypex NCore400 in my setup and is going to drive a pair of B&W 802D2. These are well known for beeing an Impedance-Diva, going down to 2 Ohm in some frequency ranges.

Today is my first evening with the amp and I love it already!
My speakers are now "grown up", more bass, more mids, heigths as well as before, but what amazes me most is the much wider and better defined stereo image.
The NC400 wasn't bad but not that much refined - and they cheated twice on me with dying SMPS's.
This is going to get a LONG evening...
Thanks to Audiophonics - nice case, very well assembled amp, lightning-fast delivery and the implemented trigger logic is the topping cherry on the cake.
Well Done folks!
 (0)
 (0)
This review has been posted for AUDIOPHONICS HPA-DM750ET Power Amplifier Dual Mono Class D Purifi 1ET9040BA 2x750W 4 Ohm
Note :
 5/5
Date :
I've come full circle.
If you have analytical speakers that, like mine, are almost impossible to control without a very serious amplifier, I highly recommend it. It's allowing me to enjoy and discover the sound these speakers can produce, something no other mid-range but high-power amplifier has been able to show me. The amplifier has to work incredibly hard with these speakers; after a listening session, you can feel how hot the entire chassis is due to the high demands placed on these speakers.

The sound is perfect: detailed, realistic, and brilliant vocals; crystal-clear, present highs that are neither harsh nor fatiguing after hours of listening; and the bass is magical. I've never been able to enjoy bass so spectacularly controlled and defined as I do now.

The sound is now at the same level as what I heard years ago when I went to audio trade shows like Sonimac (Barcelona) and entered acoustically treated rooms with speakers like mine and McIntosh amplification worth thousands and thousands of euros.

For me, the search for perfect sound is over. This amplifier, along with the rest of my equipment, gives me everything that has motivated me for so many years to achieve this sound. I recommend it to anyone with complex speakers; you'll be able to enjoy perfect sound.

Extremely happy.
Equipment: Rotel RC1590 MK2 and DENON 3930 SACD with DSD source from PC.

The shipping and packaging were fast and perfect.
 (1)
 (0)
This review has been posted for AUDIOPHONICS HPA-DM750ET Power Amplifier Dual Mono Class D Purifi 1ET9040BA 2x750W 4 Ohm
Note :
 5/5
Date :
Selecteur de sources
possesseur du HPA-S500ET avec purifi 1ET7040SA qui apparemment n est plus au catalogue, je peux affirmer que le produit est exceptionnel il drive mas magnepans aussi bien q avec mon feu mark levinson 36, je n ai aucun doute que cet ampli fear le job, mais je ne ne craque pas par ce produit car je doute qu'il amene un plus sur mon systeme et surtout il le changement de source ce fait toujours sur l arrère de l appareil ce qui est un gros handicap pour moi quand je passe du tout numérique a l analogique pour écouter ma platine disque. je changerai donc pour un nouvel purifi audiophonics dès que le changement de source sera sur la façade avant, désolé pour cette petite critique .
 (0)
 (3)
This review has been posted for AUDIOPHONICS HPA-DM750ET Power Amplifier Dual Mono Class D Purifi 1ET9040BA 2x750W 4 Ohm
Note :
 5/5
Date :
C'est la classe (D) cet ampli
Première expérience en classe D et je dois dire que je ne m'attendais pas à ça.
Après un excellent Rotel RB 1582 MKII qui a fait vibrer des Focal Electra 1027, voici donc le remplaçant et l'effet est immédiat dès les premières heures d'écoute. On gagne nettement en définition, avec des basses impactantes et parfaitement contrôlées, quel que soit le volume.
C'est hallucinant la maîtrise de cet ampli. Je suis en gain le plus faible, relié en XLR à un pre-ampli Cambridge 840 et un dac FiiO K13 R2R.
La magie opère tout de suite, pas besoin d'attendre que ça chauffe.
Bref ravi de cet achat, certes c'est cher mais le rapport qualité prix est à mon avis imbattable. En plus la qualité de fabrication est excellente.
Bravo Audiophonics !
 (0)
 (0)
This review has been posted for AUDIOPHONICS HPA-DM750ET Power Amplifier Dual Mono Class D Purifi 1ET9040BA 2x750W 4 Ohm
Note :
 5/5
Date :
Can it get better than this?
Ordered Monday from France delivered Friday in Sweden, great! Assembly great! Sound great! My strongest recommendations for the product and Audiophonics!
PS. I wish I could change the color of the on/off button for better synchronization with the other equipment DS.
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This review has been posted for AUDIOPHONICS HPA-DM750ET Power Amplifier Dual Mono Class D Purifi 1ET9040BA 2x750W 4 Ohm
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AUDIOPHONICS HPA-DM750ET Power Amplifier Dual Mono Class D Purifi 1ET9040BA 2x750W 4 Ohm
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The Audiophonics HPA-DM750ET is a Class D power amplifier featuring dual mono architecture. Integrating two Purifi 1ET9040BA amplifier modules and...

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