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
I finally purchased the STA 200 amp and it is only 3 hours into listening—I enjoy the soundstage, imaging and sonic bandwidth. The price is fantastic and may be a used amplifier killer up to $2000 used / $4000 new. I’m comparing it to three other amps and will post my impressions later. 
The only issue is the limited space for connecting my speaker cable for bi-wiring. 
To both jetter and abery ( and anyone else ). Although I am not using my pair of STA 200s in my main system, I do believe it is an amazing little amplifier. I also believe I have as much, if not more, experience than most, in using the amp with several different combinations since my acquisition of the first sample almost 2 years ago. The amp was designed with a passive pre to go before it, and for a year now, this is how I have been listening. Not just with the STA 200, but with other amplifiers. Without naming names, I owned 2 top tier preamps, that were quite excellent, but ultimately, determined they were coloring, and robbing my system of details in the music. I would suggest both of you to take your preamps out of your systems, and run only through the SYS, for about a week. There will be an adjustment your ears will make, as I know you will not like everything you hear at first. But if you really appreciate your recordings for what they truly are, and can be, given time, you, like me, will stay passive. This is especially true with the input sensitivity, and gain, of the STA 200. No preamp, one less pair of interconnect, and I am telling you, your preamps are not needed. My Luminous unit is incredible. Silent, reliable, and offers me remote volume, which I never had before in my main 2 channel system. My Dac is quite amazing as well, and it is an older type ( modified Adcom GDA 700 ), and drives any of my amplifiers with ease. And if I am wrong, after about a week, all you need to do is go back to your preamps with an extra set of interconnects, and, enjoy ! So, there you have it. Enjoy ! MrD.
Thanks for suggestion. I will try "sys only" this weekend. Now, I did use my Prebox S2 as a pre while my RP-5 was getting repaired and it performed outstanding. Finding a passive pre with all the features, inputs and remote as the rp-5 would be quite difficult.
Looking forward to your thoughts on the SYS/STA200 direct into your Zu speakers. 
I haven't read this whole thread, and maybe it was mentioned, but does the Sys have a remote control?  Thanks,