SparkoS Labs SS3602, MUSES02, OPA2134PA, High Quality Operational Amplifier Chip for BT20A PRO and V3 (1 Pair 2PCS)
SparkoS Labs SS3602 was a worthwhile addition for my sound level
While the opAmp upgrade cost more than the BT20A Pro, the sound quality improvement is worth it. Would have been great if shipped with instructions, and if it arrived a bit sooner.
Ordering and delivery was a pleasure experience. It comes as 2 per order.
With these opamps installed on my R and L channel, the overall sound profile became warmer. The highs got smoother. The listening experience became more enjoyable for me because it tookout the listening fatigue I was getting with the stock ZA3+Airmotiv B1+ setup.
I now have 2 V3 amps and bi-amping my speakers. They are well priced, and sound far better than their price suggests, but the experience is great. I would have preferred larger binding posts, but I am using banana plugs. Power is spec is over optimistic, but adequate for normal listening. Well Done. Love it.