2pcs LM4562NA LM4562 Dual High Performance, High Fidelity Audio Operational Amplifier IC，DIP-8.

Lowered the hiss on my stock Aiyima A07.

I bught these to replace stock OP amps on an amp I built utilizing TPA3255 chipset, well two of them actually and the stock OPamps were TL072. Upon installing them immediately noticed distortion crackling etc. Im hoping its just a bad chip and have replacements coming. Will update then

Differences between the good old Signetics and these are really small. I think, but not obvious, they are just a tad smoother in a Fosi V3 amp. It may be much more clear in a headphones amp. Cheap to try. One does have to understand, the performance of these things is approaching the distortion from just a resistor, pretty incredible.

Put these in my A07 and it definitely made it more crisp and clean…also gained some volume with less distortion. It was well worth the 7 bucks. Would have given it 5 stars but the packaging sucks and they came all bent up.

I purchased these OP amps LM4562 for Fosi P2 headphone amp. They would produce a very noticeable crackling sound on vocals. So I put the stock 5532D OP amps and crackle is gone. I also do not think these LM4562 chips are any better then 5532D.Anyway I am not happy with these.