AIYIMA A07 TPA3255 Review (Amplifier)

[rsqt]

I just hooked up my old Aiyima A07 and am really enjoying it. I have several tpa3255/tpa3251 amps and I like the subjective sound of this one the most, even though the measurements tell me I shouldn't. I have an original Topping PA5, the Fosi V3 and the A07. Of the three, the Aiyima has the highest gain, the Topping the lowest gain and the Fosi is in between the other two for gain. While I appreciate the lower distortion of the PA5, it just doesn't have the same "wallop" in dynamics and neither does the Fosi. It's interesting that in the measurements, the Aiyima A07 has the lowest high frequency distortion at 6w and 15khz even though it has 10db more gain than the Topping and 5 more db than the Fosi. All the extra feedback doesn't seem to have much effect above the mid-frequencies.

And the sound gets much better with better caps, bypass caps, OPA1656 (with caps/bypass caps between pin 4-8). It is a very cheap but effective tweaking.
in my sleeping room I use Fosi V3 Mono up to about 3,5khz and above the A07 for a Fostex Horn Tweeter.......works really great.

 

[antcollinet]

And the sound gets much better with better caps, bypass caps, OPA1656 (with caps/bypass caps between pin 4-8). It is a very cheap but effective tweaking...

All the evidence shows that this is vanishingly unlikely.

Still, if you have measurements showing the improved parameters on the output of the amp, I am willing to be proved wrong.

 

[rsqt]

Where is it shown? Which parameter shows a wider, deeper or a better 3d soundstage?

 

[antcollinet]

Where is it shown? Which parameter shows a wider, deeper or a better 3d soundstage?

If there were a difference on the output causing those things to change then you would be able to measure a difference.

But there won't be: electronics don't influence sound stage. Soundstage comes from the way the music is produced (differing phase and level between the left and right channels) and the positioning of speakers and their interaction with the room (reflections).

 

[Bruce Morgen]

Let this be written and understood: subjectively perceived characteristics like "soundstage" and "imaging" are not a function of amplification. If changing and/or adding components to an amplifier introduces an audible change -- whether heard as an improvement or not -- in the listening experience, the overwhelming odds are that the modification has had an effect or effects than can be measured.

 

[JEK]

Hello, in mono only 1 rca works?

 

[staticV3]

Hello, in mono only 1 rca works?

Hi @JEK! Welcome to ASR.

The A07 does not have a Mono mode.

If you want to output to a single speaker, simply use one of the two channels and leave the other disconnected.

 

[JEK]

Hi @JEK! Welcome to ASR.

The A07 does not have a Mono mode.

If you want to output to a single speaker, simply use one of the two channels and leave the other disconnected.

Thank you very much, I've been following the forum for a few years, but I don't speak English well and it's a little difficult to chat and speak some more technical terms.

I have a lot of measurement equipment, a lot of projects, but as my English is that of a translator, I just try to read.

As for Aiyima, I asked in the wrong place, the question was about the a07 max, I found answers from the manufacturer. I have a question but I won't be able to be understood in English, thank you.