3 channel 1ET400A
Purifi 1ET400A Based Amplifier

Purifi 1ET400A based amplifier – Powerful and precise

Apollon Audio 3 Channel 1ET400A Amplifier with true triple mono design incorporating Purifi 1ET400A amplifier modules. Delivering power for the most demanding studio, PA or audiophile speakers with amazing clarity and brutaly honest linear sound.

Thrilling sound experience with our custom input buffer boards

The Purifi 1ET400A based amplifier has the option to use a custom input buffer board with class A op amps that makes the Purifi 1ET400A work to its fullest potential and create a mind-blowing musical experience. With our 3 Channel Purifi 1ET400A Amplifier you have the option to choose our custom Apollon input buffer board built around Sonic Imagery 990 PRO OP Amps or Sparkos Labs SS2590 PRO op amps and Sparkos Labs regulators. The Apollon input buffer board is using highest quality 1% metal film resistors and audiophile grade polystyrene capacitors, while the power is being conditioned with discrete voltage regulators made by Sparkos Labs.

very big soundstage and defined 3D sound

The amplifier is handbuilt with highest precision using only highest quality components. To connect your speakers we use premium WBT 0703 CU or WBT 0703 AG (optional) Binding Posts that are internally connected to the amplifier with Neotech UP-OCC 12AWG Solid Copper Speaker Output Wire. The input connectors are Neutriks high quality gold plated XLR sockets. The amplifier has a soft start function and it is turned on with an illuminated switch on the front panel. The amplifier also has a standy mode, to turn it off completly a high quality mains switch on the backpanel is used.

The amplifier contains three Purifi 1ET400A coupled with Apollon Audio custom input buffer boards. Because it is a true triple mono design eachPurifi 1ET400A module is powered with a dedicated SMPS Hypex power supply boasting 1200Watts of power each. The standy control module is powered with a low-voltage power supply unit.


Apollon Audio PRO Input Buffer – Sonic Imagery 990ENH TICHA Discrete Op Amp

Sparkos Labs SS78 & SS79 Discrete Voltage Regulators

Providing power to the Op Amps and the Purifi 1ET400A, the Sparkos Labs SS78 and SS79 Discrete Voltage Regulators play a key role for ultra low noise and fast transient responses on our custom input buffer boards for the Purifi 1ET400A based amplifier. They are responsible for improved low level listening ability, far superior 3D soundstage and high frequency details. The difference is mostly noticable at higher volumes, where the clarity remains on higher levels and with ample details and dynamics even at low listening levels.

The Sparkos Labs SS78 and SS79 Discrete Voltage regulators bring many advantages compared with standard monolithic designs where large capacitors for heavy filtering on the internal voltage can not be implemented. The fully discrete erorr amplifier on the device gives the ability for amazingly high input rejection and unique compensation techniques that are not possible to implement with regular monolithic IC error amplifiers.

Power rating (per channel)

Watt @ 2 Ohm

Watt @ 4 Ohm

Watt @ 8 Ohm

Technical Specifications

True Triple Mono Design
Distortion: THD+N – 0.00017 % 20Hz
Frequency Response: 20 – 20kHz +/-.01dB
High Input Impedance 47K
Signal to noise ratio: 131db
26.5 dB Gain
Ultra High Damping Factor
Power rating (channel): 450W @ 2ohm | 425W @ 4ohm | 227W @ 8ohm
Case Dimensions: 450 x 392 x 82 mm ( 104mm height with feet)
Weight: 12,7 kg


Hypex SMPS1200A400 (3 pcs.)
Purifi 1ET400A amplifier (3 pcs.)
Apollon Audio Input Buffer Board (3 pcs.)
High quality low voltage PSU for standby control
Neutrik gold plated XLR line input sockets (3 pcs.)
Gold plated RCA input sockets with selector switch (3 pcs. optional)
WBT 0703 CU binding posts (6 pcs.)
Neotech UP-OCC 12AWG Solid Copper Speaker output wire
12V Trigger with passthrough (optional)
High quality fused mains input socket with power ON/OFF button
Aluminium enclosure with anti-vibration aluminium feet

Purifi 1ET400A Modules
Hypex SMPS1200 Power supplies
Apollon Audio Input Buffer Boards
WBT 0703 CU Binding Posts

Enclosure description and options

The Apollon Audio 3 Channel Purifi 1ET400A amplifier case with Purifi 1ET400A modules is very elegant and made of anodised aluminium. You have the option to choose a black or silver finish of the 10mm aluminium front plate aswell as black or silver finish of the aluminium feet. If you would like to have the option to mount the amplifier inside a rack there is also an option with 4mm rackmount faceplate in silver or black finish.

Extended 2 years Full Warranty

The Apollon Audio 3 Channel Purifi 1ET400A amplifier comes with a 2 Years Full Warranty. We are using only highest quality components and materials to build the Apollon Audio amplifier based on the Purifi 1ET400A. This selection by itself is a guarantee that the final product will stand the test of time and everyday use. Each amplifier is handbuilt with highest precission and care so we proudly stand behind our product and offer you a Full 2 Years Warranty.

Choose a discrete Op Amp that best suits your listening preference

Sparkos Labs SS2590
PRO discrete Op Amp

Listening impression and sound characteristics

The SS2590 PRO discrete op amps will outperform virtually all audio grade monolithic IC op amps in open loop gain, noise performance, output current, and magnitude of class A bias current. With comparison to the 994ENH Ticha disrecete op amp they are more soft, richer sounding and warm. They are your perfect choice if you would like to just sit back, relax and enjoy the music as everything just sounds so pleasing with the Sparkos SS2590 Pro op amp. If your current sound system lacks a spark of liveliness the Sparkos SS2590 is and ideal choice to bring a bit of warmth into your system.

Sonic Imagery 990 Discrete Pro Op Amp

Listening impression and sound characteristics

The Sonic Imagery 990 Pro is a high performance discrete operational amplifier designed for professional audio applications and areas where ultra-low noise, low distortion and highly linear uncoloured performance is required. It is a perfect choice if you have the professional need to analyse music or just like to explore the finer details. It will enable you to hear things like “oh the engineer eq’ed the piano too much or he over compressed the vocals” because they are very linear and analytical. It will make it possible to hear all the flaws in the mixes in a second.

What our clients say about us…
We are humble and do not like to brag, so below you can find just a few selected testimonials from our happy clients that own some of our amplifiers.

“I had a pleasant surprise this evening. I had the visit of Johnny Cash and June Carter at my place and they performed an outstanding live performance. My all body was shaking and thrilled by the flow or their amazing voices and the rhythm of Johnny’s guitar.

This amazing experience was possible thanks to my customized NC800SL I just received this morning. It feels like a quality product. It looks and sounds great. And it should further improve after few more days of listening.
The Apollon Team did a great job. The custom 8 connectors are perfect to bi-wire my B&W CM10. I was looking for the best value for money amplifier based on the Hypex NCore.

I am glad I found Apollon Audio.
I have to go. More guests are coming. The Folsom prison is inviting itself to my place. “
Nicolas Payen (Singapore)

“I’ve had the amp for about a week and a half now and I’m enjoying it quite a bit.  It’s opening up nicely and the depth and detail are excellent.  I’ve had to adjust my subs (dual Rythmik F15s) down a bit because, I believe, my Tylers are now being driven more to their potential. Excited to hear if things open up even more.

Very happy so far with my purchase.  Thanks again!”

Rich Stratton (Atlanta, USA)

“The amp sounds amazing. Everything you said about the amp is true. Super accurate, super precise and fast. I rediscovered my NS10s.”

Dominique Meyer (Switzerland)

“I received the amplifiers, I thank you again for the quality of manufacture. I will do a very good publicity for Apollon Audio.”

Cyril Khoudir (France)

What you get!

When you buy the Apollo Audio Purifi 1ET400A 3 channel amplifier today you get:
A Handbuilt amplifier. The Apollon Audio amplifier is carefully assembled by hand.
Based on Purifi 1ET400A. The Purifi 1ET400A amplifier modules are one of the best performing class D amplifiers.
Hypex SMPS powersupplies.  Each providing 1200W of power is a key factor for sound dynamics.
OP Amp of your choice. You can choose the Sparkos Labs SS2590 or Sonic Imagery 990 OP Amp.
Power rating. The amplifier gives you [email protected], [email protected] and [email protected] of power (per channel).

Neotech UP-OCC 12AWG Solid Copper Speaker output wire adds more space and airiness.

WBT 0703 CU binding posts made of pure Copper; accepts banana plugs, spades, crimped cable ends
Low voltage PSU for waking  the amplifier from standby and make it more energy efficient and green.
2 Year Full Warranty The amplifier has 2 years full warranty for any defects or malfunctions.
14 Day Money Back Guarantee Take your time to listen to the amplifier on your home system and evaluate it.
Seize this opportunity today to own a premium Purifi 1ET400A based amplifier built to the highest standard with high quality components to finally get the amazing sound that you have always dreamed about for a fraction of the cost.


14 Days Money Back Guarantee!
“Put us to the test! Use the amplifier for up to 14 days, risk-free. If for any reason you are not completely satisfied, simply return the product for a FULL refund. Just drop us a line at our support email to take advantage of our 14-Day Money-Back Guarantee. All we ask is that you send the amplifier back to us in the original packaging, and make sure that it is in the same condition. If you are not 100% satisfied with your purchase, you can return your amplifier for a full refund.”
buy the perfect amplifier to power your loudspeakers – absolutely risk free
Seize this opportunity today to own a premium Purifi 1ET400A based amplifier built to the highest standard with only high  quality components that will give you a magical musical experience that you have yet to experience on your loudspeakers.

Enjoy your leisure time listening to your favorite recordings, giving you a magnificent feeling of joy, with the Apollon Audio 3 channel Purifi 1ET400A based amplifier being a major cause for the stunning performance of your loudspeakers.

And remember that you have 14 days to thoroughly test the amplifier in your own home, with your own loudspeakers in a familiar enviroment and get to know it and hear its performance. If by any chance the amplifier does not live up to your expectations just send us an email and return the amplifier for a full refund.

Apollon Audio 3 Channel Purifi 1ET400A Amplifier