Power output of tube amps compared to solid states


I'm having a hard time trying to figure out how tube amp power output relates to solid state power output. I've been looking at the classifieds for tube amps and I see lots of tube amps with 50w or 60w output, but nothing close to the 250w output typical of solid state amps.

So I have no idea what type of tube amp is required for my set up, right now I'm using totem forests with a required power rating of 150w-200w at 8ohms. The bass is so powerful on these that I have the sub crossover set to 40hz.

My question is, are tube amps so efficient that 50w from a tube sounds like 150w from a solid state? Or will 50w output from a tube severely limit how loud I can play my speakers? If so, are tubes usually meant to be driving super-high efficiency speakers?

I had previously tried a tube pre-amp with a solid state power amp (both musical fidelity) and didn't like the results because the imaging suffered greatly, even though the music sounded nicer from a distance. Now I want to try a solid state pre-amp (bryston) with a tube power amp (no idea which brand to look at), but I don't know how much power output I need or if it will even be possible with my speakers. Does anyone know what I would require?
acrossley
Atmasphere,

Interesting.

Does Wilson then state that the Watt/Puppy was designed to work best with tube amps, or is that just the way it happened to turn out.

If not, then it sounds more like the Wilson design is flawed however a tube amp might be the right bandage.
Interesting conversations. The original conversations changed from the definition of power to sound quality of tube vs. solid state amps. There is an amazing bias here between the tube lovers and solid state lovers and music lovers. Personally, if the music doesn't sound real, then I couldn't care less if it is solid state or tube. Same logic applies if the sound drives me out of the room. As I mentioned previously, quality designed tube or solid state amps would reproduce the signal accurately and both sound wonderful. Speakers have various impedances and some are easlier to drive than others and that really affects whether the amps would work well or not. There are many various criteria for amp design. Imput impedance, gain, output impedance, current capacity, voltage, power output into specific loads, etc. All of these criteria can help determine if the design and construction and parts used should be of higher quality or not. Some times, more than not, you really do get what you pay for. All that said, I have listened to some wonderful tube equipment and also have listened to some equally wonderful solid state equipment. Nothing is perfect yet. it would be hard to design and build perfect. First, you have to assume that the music was recorded 100% correctly, using equally great recording equipment and that just simply is not the case. Maybe with Mark Levinson or Manley recording gear, but in most cases, the music isn't recorded perfectly from the beginning. Then send the signal from a source (album or cd or tape) to your preamp. Well, the cables have impedance don't forget and will slightly degrade the signal, unless corrected for. the pre-amp will degrade the signal. not one is perfect. The cables from the pre-amp to the amp degrade the signal. The amp will degrade and the speakers aren't perfect in reproducing signals either. See where I'm going? At this point in our scientific history, we aren't there yet. Electricity over wires and through tubes, resistors, inductors, capacitors, transformers, etc. will produce distortions and have losses. Can't get around it. Can a tube amp beat a solid state amp? absolutely, same can be said visa versa. How were they designed and built? Were they designed and built on the same price point? power output?, etc. if not, you are comparing apples to oranges.

I love good, accurately reproduced music and couln'd care less if it came from tubes or solid state. If it is right, then it is right.

enjoy
Atmasphere, I suspect that some like; Jim Strickand of Acoustat, Roger Sanders of Sanders Sound Systems (formerly Innersound), Roger West of Sound Lab, Gayle Sanders of Martin Logan, Nelson Pass of First Watt, and Dave Wilson of Wilson Audio might disagree with your proclamation re: the suitability of ss with the types of speakers you've mentioned.
Some would argue that it's actually the additional coloration of tubes that make them appealing.
I would argue that there is greater chance of flushing money down the loo by prioritizing speaker choice to accommodate amplification rather than choosing a speaker which fits in ones budget, works in ones room, and which offer the least objectionable coloration's for the individual purchasing them.
Unsound, if they disagree, its only because they have not been studying what happens that is different between tubes and transistors with respect to how they drive a load. Roger Sanders and I already went around on this one, and if you ask Roger West, he'll tell you that a lot of his customers use our amps... and Nelson Pass has different nomenclature as he uses Voltage Paradigm terms and I don't, but he and I are on the same page here. Just look at his articles about 'current source' amplifiers.

You might also look at a great article written by the chief engineer of EV http://paulspeltz.com/tomcik/index.html

What you get from this article is that there are no known examples of speakers needing over 20:1 damping factors, but that there are speakers that need damping factors of 0.1:1. IOW, the Voltage Paradigm does not work for all drivers.

Sorry for the OT- this really deserves a different thread.
Atmasphere, I do believe your argument has merit. It's just interesting that a couple of those ESL designers also designed ss amps to be used with them. Nelson Pass used ESL's amongst others when developing the Threshold amps. J. Gordon Holt, founder of Stereophile used both tubes and ss with his ESL's. Many of the others used both tubes and ss when demonstrating their speakers at big shows. I would imagine they would want to demonstrate them at their best, and at the very least, not at their worst. I'm sure many who can afford them, use your fine amps where appropriate.
The damping factor issue is a whole new ball of wax, and yes, your probably right, better for a different thread.