Nuforce STA200


I am curious about the Nuforce STA200 amplifier  If anyone has experience with the amp it would be appreciated if you would share your listening impressions, both good and bad.  Some of the descriptions I have read classify it as a class AB amp and others a class D amp.  I am not technical savvy about these things, can a single amplifier be both? 
Thanks
George
jetter
Hi MrD-

Are you using a dac with the STA-200?  If so, which one?  I think we’re both using the same passive pre amp.  I’m using a CEntrance dac mini, but thinking of upgrading.
I have a modified Adcom GDA 700 ( an oldie ) along with an after market cord and fuse. I've tried some more recent units ( all under 1K retail ) and still enjoy mine. I have an AA DDE V3.0, with an upgraded power supply and power cord in another system, which I also enjoy. Enjoy ! MrD,.
I also have a Freya, I could not use the Tube stage with the Nuforce, very loud hum/static/hiss etc. I actually can't use the tube stage with any amp, in my 12' x 13' x 8' room with 93 dB efficient speakers. Nuforce's high gain made it even worse than other amps I tried. 

I found I like the passive mode best anyway though. 
brad, if you were to connect the Nuforce to your speakers, without connecting anything to the amps input, ( any amp for that matter ), you may find the Nuforce / other amps to be quiet through the speakers. I have done that with both of my Nuforce amps through my 104 db efficient speakers. The Nuforce amps were silent.I believe you may have a problem with the Freya, or a tube ( s ), as others have not reported very loud hum / static / hiss etc. Enjoy ! MrD.
MrD, thanks, the Nuforce was dead silent in the Freya's passive mode. 

Some early production Freyas had a lot of tube noise, but if I send it back I may just get a "that's normal" response and be wasting my time... 

I have decided for now to just keep using it in passive mode.