Wavac 805

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.

A gentleman I know used the 805s running into speakers rated at 90db/4 ohm(speakers w/ a somewhat flat curve) and they sounded wonderful..IMO the 805s are doubtful with your speakers.I would look into SS with some muscle

I think you are asking too much from the 805 amps for your speakers with sensitive as low as 85db/4 ohms. 87db or above would match this beautiful amp. I have tried both 87db and 90db, the MD805s really give its full potential with 90db or above , used with 87db speakers sometimes it shows small hint of strain.

I have MD 805's and it can't drive low end has grainy highs and liquid midrange. Had over EUR 50k worth of cables trying to get it sound right. Speakers are 90db/4 ohm.

I own the MD-805m and I say that it won't be able to drive 85db/ 4Ω speakers PROPERLY. Of course if you listen at very low volumes and music with one voice and a guitar maybe it will. :) Impedance curve is also very important as stated above.

Teddy Bear my wavac with the Verity Sarastro has great low end and pure and sliky highs! Maybe you had a problem with tubes?