Aiyima A07 question for case re-design

[xschop]

Yes sir.

 

[xschop]

This? https://www.aiyima.com/products/aiyima-a70?variant=47699937526036

I will hold off from the new A70 case until they work out any bugs. Haven't seen pics of the inner layout/design yet.
Until then, I'll start the next case for the A07's sibling....The A04...

 

[xschop]

Double checking, is the A07 stable down to 2 OHMs?

 

[NIXIE62]

I had that amplifier in my hands. It sounded a bit boring. We saved it by installing 2xOPA1656.

It has too much voltage gain, very impractical even with medium sensitivity speakers. You should probably go into the schematic and change what you need (a couple of resistors I guess) to get some normal gain.

I also tried 2xSparkos SS3602, but that was overkill for the price of A07, and it sounded too harsh.

 

[xschop]

Not budging here, I'm really enjoying it with the LM4562's. I just built the SDA-clone crossovers to drop in the same MTM's and run them with a large isolation transformer. Will be nice to have the large soundstage again, but with a Class D amp (damn good sounding one too).

 

[NIXIE62]

I happened to have an OPA1656 on hand from another project, anything to replace those fake OPAs. It turned out great.

 

[xschop]

This amp deserved a matching isolation transformer case...

 

[xschop]

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...

 

[xschop]

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.