The best quality-price speaker amp Pros: Price.Espatial sound and deeper soundstage.Included PSU (only some regions).Clear sound and bass with body.Op-amps swap. Cons: Basic package.Without instructions.Not include the ideals op-amps. I'm not one to usually writes reviews unless that product really draws my attention, mostly because of laziness but this product sure does deserve one.I needed a speaker amplifier because my HiFi system had died but the...

This is a review and detailed measurements of the AIYIMA A07 desktop amplifier based on TPA3255 class D amplifier chip. It was kindly purchased new by a member and drop shipped to me. The cost is US $72 on Amazon including prime shipping. And as of this shipping, it also included a 32 volt, 5 amp switching power supply. Member also purchased and sent...

Currently, the op chip used on AIYIMA A04 & A07 is NE5532. Although NE5532 performs well, many audiophiles still want to improve the sound quality by replacing the OP chip. Here we recommend some replaceable OP chips. NE5532: The resolution is average, the high frequency is relatively dry, and the low frequency is relatively muddy and fat. OP275: Better resolution, low frequency and sound field...