nobsound el34 8 watt rms with vienna acoustics bach grand speakers 4ohm 90 db ?nobsound

Try the Nobsound TPA3116D2 
It kicks some Pioneer columns ass in my office. And plenty of power to push a passive JBL 10" sub I couldn't give away on OfferUp. 

I used the Nobsound 6.8w with 89db, 4 ohm speakers as an interim fix for a while. It sounded surprisingly good, but didn’t have bottom end bigger amps have. It would play loud enough to annoy my wife, but could run out of steam if pushed hard. for average background music it was fine.  Unless you never listen very loudly, I’m not sure this combination sounds like a keeper long term plan if you ever sit and listen actively. I’d either go with a bigger amp (maybe 25-50 watts +), or more efficient speakers.