Mosfet amps A true compromise betw. tubes and SS?

Even tube is not tube. The sound you get depends on what tubes you use. Their is no direct correlation between Mosfet transistors and tube like sound.

For example; the current crop of Conrad Johnson solid state amplifiers that replaced the MF2100 (and others) use Bi-Polar output transistors instead of Mosfets. They also use Field Effect transitors because they handle voltage in a way similar to tubes.

So just buy an amplifier that you like the sound of; and forget the buzz words.

You may want to try a tube preamp with a solid state power amp. It is a good way to get the best of both worlds.

Yeah...what they all said. I ended up buying a used Counterpoint SA-100 amp (a hybrid tube/mosfet design). It sounded pretty nice in stock form, but those particular mosfets had a history of failure. I had mine completely rebuilt by the original designer and he has since switched to something other than mosfets (you can check it all out at www.altavistaaudio.com) on his newer designs and rebuilds. Some people love their characteristics, but like the above people said...it all depends on the designer. There are good and bad designs using all technologies. Still...I do prefer some tubes in the system. I have gone in the direction of hybrid amps and preamps, but you can always mix tube and SS like Sugarbrie mentioned above.

Interesting question - from my own listening (and there are a lot more experienced listeners in this forum), very bad MOSFET designs have similarities to very bad tube designs ("mist") and very good MOSFET designs can sound remotely similar in character to pretty good tube designs as can some other SS approaches. Understand that I am definitely a tube fan, so my response is biased by that perspective.

When combined with a tube input stage (one of the possibilities for "hybrids"), MOSFETs often sound better (to a tube enthusiast like me). As support, I would point to the LAMM M1.1, though I have heard some of the Counterpoint gear sound great in synergistic systems.

That having been said, I have spent a great deal of time lately looking for SS amplification that could make a tube fan like me content to listen... I have yet to find a completely satisfying compromise, though a recent thread gave me a number of good leads (the suggestions I've followed so far have been among the most musical SS I have heard).

Overall, I have to agree with everyone else here that, while I understand where the reputation arises, there is no clean correlation in my experience between "tube-like" and "MOSFET" so you've unfortunately just got to listen in your system.

Good luck in your search. Incidentally, I have not heard the Fusion 700, so can't comment directly. Hope my rambling somehow helps...

Jacob

Isee now that the Brinkman offers a optional onboard DAC. So its not a hybrid. It's like a amp-dac??? But i do like the fact they don't try to hide anything. The unit comes with a glass top!! Thats cool.

Of course Tweeterman will take exception with me on this, but I don't believe that anyone can look at a web page, see what type of technology is employed in a piece of gear, and think they have even an inkling of what it will sound like - either in an absolute sense (if that even exists), or particularly in their system (the only place that it ultimately matters). By all means, audition some MOSFET gear if you are curious, but don't expect any more uniformity of sound between different amplifiers of this type than there is between amplifiers of the tube type. If that sort of thing were actually the case, then there would only be a handful of distinguishable amplifier "sounds" - one for each type of active device employed in amp circuits, and we all know that is not true. That's because everything matters, not just one thing, and the way the overall circuit is designed and implemented is generally regarded as being even more important than what type of active devices are used. If I were interested in trying out something new based on an idea about its technology, I sure wouldn't make it a "sound-unheard" purchase, off of a website, of foreign gear that no one in my country sells or services, much less has even heard of. Sure, the stuff *might* be great, but what would I be able to do with it if I wound up not liking it so well? (FWIW, the MOSFET amp I used to own sounded nothing like [and not as good as] my present tube amp.)

P.S. BTW Tekunda, mightn't you be jumping the gun just a little bit, plotting your next amplifier change before you even know if, in your words, your "recently" bought amps will "work satisfactorily"? Why not give 'em a chance - they certainly weren't cheap! You have my sympathy if Audiophilia Nervousa is really that advanced!