Wavac 805

Some people will listen to this combo and say YES the amp can drive this speaker.Others listening to the same combo will say the opposite.I have no experience with the Wavac but I can say that my 30 watt SET drives my 88dB/4 ohm speakers
perfectly.Of course this is to my ears.
Sorry I cant give a better reply I hope others are able to.

I agree, my 22 watt 845 SET drives 89db speakers perfectly. In general it depends on volume you listen at, room size, musical tastes, a solo singer is different from a Symphony orchestra with all the stops out. I have heard the Wavac and it is very special, mind you , it should be at the price.

You also need to look at the impedance curve of the speakers. Most speakers have a dip around the bass region, which means that the amp will have to supply a lot of current. If your amp can't do it, not only will you get less bass - your midrange and top end will clip.

Look for speakers which have a benign impedance load. As flat as possible, and 8 Ohms.