Nuforce STA200

Mesch, I have two pairs of nominal 6 ohm speakers, both probably in the 85db range.  One is a 2&1/2 way with two 7 1/2" or so scanspeak mid/woofers.  I can run the unit all day, with the STA200, being fed by this tube preamp, http://www.divertech.com/coplandcta305.html and the amp never is even warm to the touch.  I have a Schitt sys, but honestly it is set to not reduce the output to the amp at all as it is not needed.  In other words, the volume control can be turned up far enough (high enough) from the zero position with the sys in or out of the system to not worry about the preamp volume control not being high enough to function fully.  I don't understand the impedance matching thing to know if I happen to have a more compatible preamp than normal or what.

Well, I might just be overly cautious. I need to spend more time with my STA200. I certainly am happy with it's sonics and it seems compatible with my PS Audio Digital Link III via the SYS. In addition to the speakers I mentioned earlier, I also have a pair of Dali Zensor 1s which don't drop lower that 5ohms and are 88dB sensitive. I will try the amp with these as well. 

I purchased this amp for use with a passive pre in an attempt to build a low cost high quality system.  Though I don't believe specs tell the whole story, I do believe there are some that certainly help to insure electronic compatibility between components when putting together a system. I have learned much from this forum toward that end. I remain with much more to learn.

Happy New Year to all!

Thanks mesch for your clarification, truly appreciated.  From your earlier post I got the mistaken impression that you were saying that you knew of an identified amplifier design weakness that could result in possible serious amp failure.  I don't think this any longer.  These things do happen though, for example, I have a pair of Goertz alpha core speaker cables that without the use of zobel networks have resulted in some amps going into oscillation with not pretty results.

So blue skies on this end.

My speakers are so easy to drive (101db efficiency), a clock radio hooked to them will fill the room. As far as the amp blowing, there are so many variables it would be hard to figure out what happened with so little info. This is the first time of hearing of such happening with the STA200. Hopefully, the person purchased new with a reputable dealer

Jetter, Thanks. I was not familiar with the Copland pre. Looks to be a fine unit.  

Aberyclark, Yes we need more info re the blown amp. So far no response to your previous post asking for clarification.