Aiyima’s new balanced amplifier- A20

[MANDEV1L]

Currently, using subwoofer with HPF to 3e Audio A7.
I guess the Aiyima A20 may have similar performance.

What I am waiting for is a modern class D amp with Stereo XLR subwoofer out, integrated LPF and HPF for both main and sub out, the crossover setting can be implemented as a dip switchs/stepped rotary knob with detents.
Hoping there is such product in the future.

 

[Schlippwhip68]

Do I really really need the T20 together with A20 for the best sound quality?
Are the original tubes fine or should I replace with something else?
How about the op amp?

I mostly listen to music and watch anime. I'm a big fan of neutral balanced sound btw.

If you want super neutral or least as neutral as the T20 might get I would go for the dual opa828 (op amps x 3) and the Psvane Horizon ECC83 Valves.

 

[Fxfighter]

Receive the metal rack. It's with decent weight. Aluminum helps reduce heat. Awesome!

 

[ziggurcat]

I am keenly interested to see how this thing measures up.

 

[Schlippwhip68]

Receive the metal rack. It's with decent weight. Aluminum helps reduce heat. Awesome!

Looks nice, did you purchase the rack through Aiyima website?

 

[Fxfighter]

Looks nice, did you purchase the rack through Aiyima website?

No. It's a 10th Anniversary gift from Aiyima.

 

[Schlippwhip68]

No. It's a 10th Anniversary gift from Aiyima.

That’s quite generous. I have similar version.

 

[Schlippwhip68]

Has anyone swapped opamp on the A20? Maybe a discreet one? Worth it?

I popped the Muses 02 in the A20 straight away didn’t even try the stock op amps.

 

[Schlippwhip68]

Does anybody have any issues with the 12v trigger. I am not sure what is going on but I have the A20 and T20 here with no trigger response at all. Am I missing something? I would hazard a guess and say the amp trigger the pre amp in this case as it’s a hard switch.

 

[Panelhead]

Trigger out on T20 to only trigger on A20. Cables are cables. Should turn off the amplifier when preamp is turned off.

 

[SnakeLord]

Does anybody have any issues with the 12v trigger. I am not sure what is going on but I have the A20 and T20 here with no trigger response at all. Am I missing something? I would hazard a guess and say the amp trigger the pre amp in this case as it’s a hard switch.

Have you already tried swapping the op-amps and matching those between the T20 and A20? Maybe even to the stock ones?

 

[Schlippwhip68]

Trigger out on T20 to only trigger on A20. Cables are cables. Should turn off the amplifier when preamp is turned off.

Thanks, that works. I expected the amp to turn on and off the pre amp for some reason. Never bothered with triggers till now so had no idea that it would be the pre amp with the remote….but yes, handy!

 

[ziggurcat]

Thanks, that works. I expected the amp to turn on and off the pre amp for some reason. Never bothered with triggers till now so had no idea that it would be the pre amp with the remote….but yes, handy!

Triggers typically work from the top of the connection chain downward. Plus, the A20's trigger is an input, not an output, which is why it wouldn't have turned your T20 on/off.

 

[Schlippwhip68]

Triggers typically work from the top of the connection chain downward. Plus, the A20's trigger is an input, not an output, which is why it wouldn't have turned your T20 on/off.

Got it. Thanks.

 

[Schlippwhip68]

Has anybody tried the opa828 in the A20?

 

[toilagamer852]

dual opa828 (op amps x 3) and the Psvane Horizon ECC83 Valves.

The tubes I can get them for quite cheap from aliexpress, but what is this dual opa828 (op amps x 3)? I searched on my local ecommerce website and found 3 buying options for opa828: sop single op amp, dip single op amp, dip dual op amp. I assume the dual op amp is the one I need? I'm not too familiar with the technical terms of electronic spare parts.

 

[Schlippwhip68]

The tubes I can get them for quite cheap from aliexpress, but what is this dual opa828 (op amps x 3)? I searched on my local ecommerce website and found 3 buying options for opa828: sop single op amp, dip single op amp, dip dual op amp. I assume the dual op amp is the one I need? I'm not too familiar with the technical terms of electronic spare parts.

For the A20 you will need 3 dual op amps. There are numerous options but the dip dual opa828 is just a very good choice for a fast, neutral sounding chip. It will allows the sound of the valves to come through without influencing anything.

OPA828 Single Operational Amplifier To Dual Operational Amplifier Replace NE5532 MUSES8920 OPA2604 LME49720 OP275 AD827
https://a.aliexpress.com/_Eyk4JjQ

PSVANE Horizon 12AX7-AT / ECC83 Vacuum Tube

PSVANE HORIZON 12AX7-AT vacuum tube features enhanced internal structure for low noise, precise sound, and superior stability in high-end audio systems.

psvane.co

 

[lucian]

For the A20 you will need 3 dual op amps. There are numerous options but the dip dual opa828 is just a very good choice for a fast, neutral sounding chip. It will allows the sound of the valves to come through without influencing anything.

OPA828 Single Operational Amplifier To Dual Operational Amplifier Replace NE5532 MUSES8920 OPA2604 LME49720 OP275 AD827
https://a.aliexpress.com/_Eyk4JjQ

PSVANE Horizon 12AX7-AT / ECC83 Vacuum Tube

PSVANE HORIZON 12AX7-AT vacuum tube features enhanced internal structure for low noise, precise sound, and superior stability in high-end audio systems.

psvane.co

maybe have a look here bevore:

Does Op-amp Rolling Work?

When I post my last video on review of Douk A5 amplifier, I mentioned that rolling (changing) op-amp ICs in there is fruitless. I got have a dozen comments under that video in youtube asking why so I thought I experiment again with the A5. Note that I have done the same testing with both DACs...

www.audiosciencereview.com

 

[toilagamer852]

maybe have a look here bevore:

Does Op-amp Rolling Work?

When I post my last video on review of Douk A5 amplifier, I mentioned that rolling (changing) op-amp ICs in there is fruitless. I got have a dozen comments under that video in youtube asking why so I thought I experiment again with the A5. Note that I have done the same testing with both DACs...

www.audiosciencereview.com

So the conclusion is that we should just use them A20 and T20 as they are, no need to spend money on part replacement for some placebo effects?

 

[lucian]

So the conclusion is that we should just use them A20 and T20 as they are, no need to spend money on part replacement for some placebo effects?

exactly. the effect of different OP is extremely small or even negative (considering starting with an audio op in first place ofc)

the by far weakest point of audio chain is the speaker + room. there you can actually achieve significant improvement.