To Tube or not to Tube......


For quite some time now I've been thinking about switching from a solid state to a tube power amp. My Threshold T-100 has been real good to me and I do like it, but it's really the only "high-end" amp I've ever owned, so it's all I know. I'm intrigued by the "warm" sound of tubes and do have a tubed phono amp and CD player, but I am by no means well-versed in the sound of tube power amps having never really auditioned one. I know that goes against the prevailing wisdom and I should listen before I buy, but I don't think I will have the luxury of doing that.

That being said, I've gone through about 20 pages of this forum reading about the benefits and detriments of tubed power amps but nothing I've read has swayed me either way. The posts I've read have been informative re: bias issues, reliability, blowing fuses or whatever else might blow up or go wrong with the tubs, etc. So, if I were to go the tube route, I would not want deal with too much of that hassle. At lease I know that the amp I have doesn't have any such issues. That's why I was leaning toward amps like BAT with their auto biasing (I also need balanced inputs), and would want at least 60-100 wpc. I would be willing to deal with adjusting bias so long as it was a relatively simple process.

I figured I would pose my main question to the exerts here (and this I did learn for this forum): given what I already have in my system, what tube amp would be a good match for me? My pre-amp is a SS Threshold, JM Lab speakers with a "minimum impedance of 4 Ohms," EAR 834P phono stage, & Unison tube cd player.
Much appreciated.
ebuzz

Showing 1 response by islandmandan

Ebuzz, I was in the same position as you, very curious about tube amps. That led me to change speakers, from Dynaudio Contour 5.4's, to 12" custom built Tannoys.

I briefly tried a Sophia Baby amp, which I liked, but I needed to go further. I purchased a VAC PA 35.35 EL 34 push-pull amp. That was a good match, at 35 Wpc.

I had always been wanting to try 300B tubes, but I didn't think there would be enough power. I took a chance on a very modestly priced SET 300B amp, from Assemblage Audio, which was owned by Sonic Frontiers. I had factory upgrades done on the amp, and settled in with it.

Turns out, it's the best amp I've had with my Tannoys. I just installed some fairly expensive EML 300B XLS tubes yesterday, and now I am hearing the closest thing to live music I've ever heard in my home.

You may not be willing to make similar changes, but for me, the results have satisfied, and rewarded, me with music listening in a way I most likely wouldn't have experienced otherwise.

For your speakers, something along the lines of the VAC PA 35.35 would do nicely. Thirty five watts per channel may not sound like much, but with the large transformers it has, it produces plenty of current for a good many speakers.

You will get many different opinions, and there are many, many, ways to get to the place you wish to be, musically speaking. What I've done has gotten me where I wanted to be, and searched for, for forty years. This is where I will remain.

Best of luck, have fun,
Dan