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AIYIMA A07 TPA3255 Review (Amplifier)

AdamG

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Just…. wow :oops:
I just translated it. I didn’t make it logical or clear. He is new so he gets some wiggle room. Not a lot but some. Also, translations can get context and intent confused and inaccurate. If he continues to post in any language other than English. We won’t be as accommodating. Benifit of the doubt for new members is what everyone said we need to do better. ;)
 

xschop

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Well with an isolation transformer on the SDA circuit, this amp runs even cooler at very loud levels....
The details coming forth are even better, along with the huge SDA sound stage...
 

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carlmart

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Well with an isolation transformer on the SDA circuit, this amp runs even cooler at very loud levels....
The details coming forth are even better, along with the huge SDA sound stage...
How do you connect this transformer exactly and what are its specs?
 

xschop

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Here's the crossovers I used for the SDA conversion. Immense soundstage improvement...

To expound: this A07 Class D amp is adequate for running Polk SDA's with an isolation transformer as the interconnect cable.


Polk 8TL-SDA.jpg
 
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MediumRare

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Here's the crossovers I used for the SDA conversion. Immense soundstage improvement...

To expound: this A07 Class D amp is adequate for running Polk SDA's with an isolation transformer as the interconnect cable.


View attachment 365268
Can you explain what SDA means and briefly what the circuit does electronically and qualitatively?
 

Natal

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I have Dali Spektor 2 speakers driven by the Aiyima 07 amplifier. I listen at low "conversational" levels but find one speaker is louder than the other. Is the problem that the Aiyima is incapable driving inefficient speakers (84 db) at a low level and I need much more powerful amp to drive the 2 speakers equally at a low level? Would a higher efficiency speaker solve the problem?
 

saberger0357

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Has nothing to do with the efficiency of the speakers. Could be connection issue, could be amp issue, could be speaker issue. I would start by disconnecting and reconnecting everything and go from there.
 

antcollinet

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I have Dali Spektor 2 speakers driven by the Aiyima 07 amplifier. I listen at low "conversational" levels but find one speaker is louder than the other. Is the problem that the Aiyima is incapable driving inefficient speakers (84 db) at a low level and I need much more powerful amp to drive the 2 speakers equally at a low level? Would a higher efficiency speaker solve the problem?
No, that would likely make things worse. The problem is the unbalance of the volume pot when turned down. Higher efficiency speakers would need you to turn it down further.

Try turning down the source digitally (if digital) further up the chain - then you can set the amp to a higher level.
 

wave

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The Aiyima 07 amp is powerful enough to drive Dali Spektor 2.

How I know? I have the amp and the Dali Spektor 2 and it can drive them really loud without distortion
 

Natal

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Thanks for the tips guys. I've determined it was my iPhone. With my TV and CD player as sources it's fine - the sound is balanced. The thing that's really odd is that I get the same problem with 2 different iphones - 14 pro and 6s using bluetooth and a direct connection via the headphone jack. It defies logic but I'm not going to worry about it as the CD player is much better sounding.
 

antcollinet

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Most likely your ipones are outputting a lower level, allowing you to turn up the level on the amp.
 

Talisman

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Most likely your ipones are outputting a lower level, allowing you to turn up the level on the amp.
Considering that the problem only occurs with iPhones this makes no sense, if they emitted a lower level and you had to raise the volume more the problem would not exist.
On the contrary, they could have a higher level and therefore have to hold the amp knob at the beginning of the rotation
 

antcollinet

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Considering that the problem only occurs with iPhones this makes no sense, if they emitted a lower level and you had to raise the volume more the problem would not exist.
On the contrary, they could have a higher level and therefore have to hold the amp knob at the beginning of the rotation
Yup - skim read, got it wrong.
 
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