Apollon 1ET6525SA ST Amplifier Review

[Descartes]

Thank you, I appreciate the kind words about the design.

Regarding pricing, the difference between our Purifi 1ET6525 amplifier and the Buckeye version is actually quite small. Our unit is currently €1090, while Buckeye’s comparable model is about €1042, so we are talking about roughly a €48 difference.

At the same time, we use significantly more expensive components in several areas:

• Higher-grade connectors and terminals
• A more complex and better enclosure
• Higher machining and finishing quality
• More expensive internal wiring and hardware

These choices increase manufacturing cost, but they also improve durability, usability, and overall build quality.

Different manufacturers simply prioritize different things. Our goal has always been to combine top tier Purifi performance with premium build quality, while still keeping the price very competitive.

Apollon how about comparing the Purifi 1ET9040BA from Buckeye!

 

[Apollon Audio]

Apollon how about comparing the Purifi 1ET9040BA from Buckeye!

The Buckeye 9040 monoblock is priced at €1121, while our monoblock is €1190, a difference of just €69 per unit. I am therefore not entirely sure what point you are trying to make.

Purifi 1ET9040BA M Monoblock Amplifier

The Purifi 1ET9040BA Monoblock Amplifier by Apollon Audio utilises the newest 1ET9040BA amplifier modules as its core. The Purifi 1ET9040BA provides abundant power and remarkable precision.

apollonaudio.com

 

[Descartes]

The Buckeye 9040 monoblock is priced at €1121, while our monoblock is €1190, a difference of just €69 per unit. I am therefore not entirely sure what point you are trying to make.

Purifi 1ET9040BA M Monoblock Amplifier

The Purifi 1ET9040BA Monoblock Amplifier by Apollon Audio utilises the newest 1ET9040BA amplifier modules as its core. The Purifi 1ET9040BA provides abundant power and remarkable precision.

apollonaudio.com

I was looking at this

Purifi 1ET9040BA Eigentakt Premium Monoblock Amplifier PET1200 M

Elevate your audio experience with the Purifi 1ET9040BA amplifier, featuring Weiss OP2-BP Op Amps and a custom-designed power supply for impeccable sound clarity.

apollonaudio.com

 

[TNT]

3. Yearly Impact
If left on continuously, switching to the 16.5 W idle unit saves you roughly €12.50 to €16.70 per year.

If you happen to have direct electrical heating, the net add cost is 0.

//

 

[Luvchampagne]

If you happen to have direct electrical heating, the net add cost is 0.

//

Hope you understood the sarcasm in my reply. I'm cheap but the absurdity of the level of cheapness of certain people in this forum is astounding

 

[mrehorst]

I'm cheap but the absurdity of the level of cheapness of certain people in this forum is astounding

You should see what the cheapness factor is like among 3D printing hobbyists.

 

[Luvchampagne]

You should see what the cheapness factor is like among 3D printing hobbyists.

But isn't the material pretty expensive? I thought 3d printing was like ink jet printing. It's cheap until you figure out how much you've spent on the refill cartridges.

 

[mrehorst]

But isn't the material pretty expensive? I thought 3d printing was like ink jet printing. It's cheap until you figure out how much you've spent on the refill cartridges.

Some industrial suppliers sell printers that will only work with their own filament, but the hobbyist market doesn't work like that.

More exotic filaments often cost more, but a 1 kg spool of quality PLA, PETG, or ABS filament runs about $20 (at least, before the war, it did). That's a lot of starwars toys and tugboats for most of them, but doesn't stop them from looking for ways to get even cheaper. There are a bunch of companies that sell recycling kits that will extrude filament from ground-up prints. The problem is they can't compete with commercial filament quality (purity of formulation, and well controlled diameter) so prints made with recycled filament usually come out pretty bad.

 

[harkpabst]

If you happen to have direct electrical heating, the net add cost is 0.

//

Mathematically I cannot follow this argument.

 

[antcollinet]

Mathematically I cannot follow this argument.

If you are heating your house with direct electricity you can do it by burning power in a heater - or burning it in your amp. The effect - and the cost - is the same.

It all falls apart in the summer - when you are trying to keep your house cool with electricity - then you pump heat in from your amp - and have to burn more power to take it out again with the AC.

It also falls apart if your electric heating is via heatpump - which only costs 1kwH for every 3 or 4kwH you put into your house - 3 to 4 times more efficient than burning heat in heater elements (or amps). Or if you heating is via gas - also lower cost.

 

[TNT]

Mathematically I cannot follow this argument.

Well, if you need an amp and at the same time have electrical heating - which is activated and heating, the net result will be that some of the heating will be done by the amp instead of the radiators. So in this case, the amp isn't an added electrical cost. In the summer however, when no heating is needed, it would be.

//

 

[hikkiDO]

I would choose the Apollon 1ET6525SA. With limited ventilation, keeping thermal stress in check is important—heat has always been the silent killer of gear. My speakers don’t demand more than 250 watts, and I have no intention of pushing them anywhere near that. These days, I prefer refinement and longevity over sheer output. Finally, as a physician, I’m mindful of preserving my hearing and avoiding tinnitus over the long term.

 

[Matias]

Fair enough. Seems like I underestimated how efficiency (heat loss) is important to most people here, more so than power. Interesting.

 

[yinkus]

The Buckeye 9040 monoblock is priced at €1121, while our monoblock is €1190, a difference of just €69 per unit. I am therefore not entirely sure what point you are trying to make.

Purifi 1ET9040BA M Monoblock Amplifier

The Purifi 1ET9040BA Monoblock Amplifier by Apollon Audio utilises the newest 1ET9040BA amplifier modules as its core. The Purifi 1ET9040BA provides abundant power and remarkable precision.

apollonaudio.com

Hi Apollon, I am interested in purchasing the 1ET7040SA. DO you have any Easter or other sales coming up soon?

 

[Glarioo]

My Apollon 1ET7040SA (Build 2024)

 

[Glarioo]

I’d like to try replacing the Sonic Imagery 994 op-amps with OPA1656’s. I just don’t know how to go about it properly… I don’t want to mess things up, you know?
Would I notice a difference in sound? I doubt it…

 

[antcollinet]

Would I notice a difference in sound?

No you won't. You can't improve the sound from where it already is with this amp. You can mess it up or cause damage though.

Don't waste your time, energy and money messing about with it. Op Amp "rolling" is quite literally a fools errand.

 

[amper42]

I’d like to try replacing the Sonic Imagery 994 op-amps with OPA1656’s. I just don’t know how to go about it properly… I don’t want to mess things up, you know?
Would I notice a difference in sound? I doubt it…

OPA1656 offers better measurements. It's funny though some people actually prefer the increased harmonic distortion of the Sonic Imagery 994 op-amps.

Purifi Eigentakt 1ET6525SA ST Stereo Amplifier

The Apollon Audio Purifi 1ET6525SA Stereo Amplifier is built around the amazing Purifi 1ET6525SA amplifier module in a very compact and light weight design with amazing clarity and brutally linear sound.

apollonaudio.com

"Our custom input buffer board by default comes with the very advanced OPA 1656 operational amplifiers. But if you would at any time wish to change the sound characteristics of the Apollon 1ET6525SA ST amplifier you can do so with simply exchanging the op amp (so called Op amp rolling). Our custom input buffer board comes with a DIP8 socket that enables you to attach a wide range of DIP8 compatible operational amplifiers on the market."

 

[Glarioo]

Well, I’d like to replace the Sonic Imagery 994 op-amps with the OPA 1656.
I just don’t know the correct procedure.
I don’t wanna break anything in the amplifier.

 

[Stinga]

Can anyone tell pls tell me which gain sttings would be best for balanced connection to an AV30 vs unbalanced RCA to a Cinema 30 pls
Thanks Al