Nuforce STA200

A couple hundred hours for break in. Leave it on, continuously, with music playing through it, if possible. The question of vertical bi-amp....I feel it is significant, but this goes with many dual amps I have had experience with. As far as a purchase, making any percentage of improvement, well, this is all part of our industry. It is a great amp, at the selling price, for many systems, and not the best, for others. System matching is still very important. 

Thank you Mr. D.  I'll follow up with an update after 200+ hrs of break-in.

TOO MUCH GAIN. Even with my McCormack passive preamp I can't turn my volume knob past the 10 o'clock position without leaving the room holding my ears.  There is no need for a preamp. All you need is a attenuator between your source and the amp. 

I have one driving my Klipsch Forte II speakers.  They are 8-ohm and have 99dB sensitivity.  It runs cool.  I WONDER if they could handle the 4 ohm JBL L-100 Classics? 

Just like Job amps, as long as your speakers don’t fall much below or preferably not lower than 3 ohms, you’ll be fine.