Nuforce STA200

I know this is an old thread and I am a new member, but I have a question about the STA200 for which I cannot for the life of me find an answer.  Is it stable driving a capacitive load?  I have Vandersteen 2ce Sigs that I want to vertically biamp with a pair of STA200s.  However, Mr. Vandersteen warns that many solid state amps are unstable driving the capacitive load when vertically biamping.  I tried calling Optoma to ask, but their tech support is dedicated to their projectors, not their audio stuff.  Please help?!

dengief, welcome.....I am not sure what Mr. V is indicating....I am running my pair of STA 200s in a vertical biamp situation ( something I have been recommending for a while now, given having two identical stereo amps, or of the same, 4 monoblocs ), and I am having no issues to speak of. The speakers I am using are a pair of Signet floor standing towers ( I was a rep when I got them ), and they sound very good being driven this way, and of course, with the NF amplifiers. I have used professional Yamaha amps, Hafler amps, Citation amps, and some others ( I had a s---load of power amps at one time ), with the same configuration, with excellent results. I owned 2c’s, and later 2ci’s ( in the past ), and have had clients with them, and never an issue, and vertically biamped them, too. Unless Mr. V. is doing something different with the latest incarnation of the model 2s, I do not see a problem. I have always preferred, is sq, vertical biamping vs horizontal, and I have done so with Martin Logan, B&W, Kef, Klipsch, Legacy, and others, that had the passive biamp ability, without issues. I would encourage you to read the manual of the Vandys. I hope this helps, but if it does not, I do understand.....my best, and Enjoy ! MrD.

Mated my Nuforce STA-200 with a Schiit Saga, was very good with my Zu Omen's. Used a Sillnote cord for $100.00 and opened up well.

Hi Mr.D.  I was hoping to hear from you.  Your comments about this amp are largely why I decided to buy a pair.  Apparently, RV used to recommend vertical biamping in his manuals, mine included.  He now recommends against it on his website and his newer manuals.  Here is a quote from RV himself on the “Ask Richard” section of his website:

”VERTICAL BI-AMPLIFING IS NOT RECOMMENDED AS MANY AMPS OSCILLATE WHEN NOT HAVING A GROUND RETURN DRIVING THE TOP END OF THE SPEAKER. THIS PART OF THE CROSS-OVER IS CAP COUPLED FOR BOTH THE MID-RANGE AND TWEETER THIS COULD CAUSE THE AMP TO OSCILLATE AT VERY HIGH FREQUENCIES. THIS COULD BE A PROBLEM AND DAMAGE THE TWEETER.”

This has me scared to try.  I wonder if this phenomenon is unique to his first order crossovers.  I have had my 2ce Sigs vertically biamped with Rotel for the past 13-14 years.  But I’m still scared of damaging something if I do the same with the STA200 I just ordered.  Thanks!

RV would certainly know best...give the company a call about your specific system