Z-Review - O2 Vs SMSL sAp II Pro Headphone Amp (Patreon)

Z-Review - O2 Vs SMSL sAp II Pro Headphone Amp

I have more respect for the Odac [http://amzn.to/1ksMWyE][$150] and O2 [http://amzn.to/1jzi6PL][$160] combo than a person should.and since I own them both. S...