+1 Wiim BUT there are choices bet. Wiim Amp vs Wiim Amp Pro. Sorry about double posting if you were aware of the following differences.
- Pro has 10dB higher THD+N ratio than non-Pro (higher is better);
- Pro has incorp. PFFB (Post filter feedback) tech which takes care of 8-ohm load dependency issue;
- Both support 4 ohm load with almost 100% amp. efficiency;
- Non-Pro has Airplay 2 support while Pro does not; and
- Pro is $80 more expensive than Non-Pro (listed at $300 but you could often find like new used for less)
Anyway, Pro does sound a bit better (according to some reviewer) but if you could not live without Airplay, Non-Pro version will be the choice.