you can check again, 2 output pin of each op-amp are wiring to 2 10uf nichicon bp, there are 2 differential input.
Hello everyone. Good thing i read this thread before the store shipped out the A07 PRO. Already cancelled it and ordered the A07 non pro version instead. Thank you all for the review and insights, much appreciated.
It's a decent amplifier for sure. What changed my mind is the dull RCA output reported here. Decided to settle with T9 Pro (BT with tone control) + A07.Well, It is a decent amplifier... I has grown on me. But as feature sets go. If you don't need or want tone controls or Bluetooth., Yes, the A07 is a great choice.
Both amplifiers benefit from competent op-amp swaps.
Well, are we sure about this issue? Could someone else confirm the same to make sure it is the issue with A07 PRO and not single unit or setup problem?It's a decent amplifier for sure. What changed my mind is the dull RCA output reported here. Decided to settle with T9 Pro (BT with tone control) + A07.
Yep... I just went to check. Listening to Imagine That by Fatt Burger.It's a decent amplifier for sure. What changed my mind is the dull RCA output reported here. Decided to settle with T9 Pro (BT with tone control) + A07.
Got a substantial raise, Won't kick in until mid Feb... I would be willing to purchase another unit to test. I'll get the second one from Amazon so I can return it. It will invariably be from the same lot. I ordered the day the email came out direct from Aiyima.Well, are we sure about this issue? Could someone else confirm the same to make sure it is the issue with A07 PRO and not single unit problem?
Both the A07 and A07 pro have a 3.5mm jack for output to a sub, or another amplifier. The A07 though is really more of a pass through and can be used as input instead of the RCA jacks. But it is there. I have my A07 connected to the Aiyima A3001 subwoofer amplifier.Wanted a line out for the sub, so got this model rather than the A07.
Well in the Pro it is pass-thru and it isn't. With the A07 - The two in/outs are basically wired together. Either can be used as inputs. Older units actually had the L&R reversed.ok, just experimented and found that the line out in the A07 Pro isn't tied to the volume control. It's a pass through.
Finding the AD827SQ/883B nicer than the NE5532 but is still suboptimal. For one the line out is a lot quieter and i have to crank up the subwoofer quite a bit. Also had to redo the speaker EQ, which is neither here nor there, but interesting.
Don't have anything else on hand so will start looking around.
I'm just a user too. There are slight improvements any user can make to add to the longevity of the amplifier or slightly tweak the sound. Thermally bonding a heatsink is not a big deal. You're already swapping op-amps.o i'm just a user, not like you folks. Haven't any testing equipment more sophisticated than a simple multimeter. And no metal working tools; can't cut a straight line so won't try venting the case.
Think i'll try some OPA1656 next, on those little adapter boards. Have an Aiyima DAC-A1 coming and hopefully the NE5532's in that will be swappable with the OPA1656 as well.