Miltiple amps for stereo Matrix 801's

Specs don't appear to be available for the output impedance of the W4S DAC2.

If you biamp, regarding the cable capacitance issue I mentioned I would feel pretty confident that you'll be ok if the length of each interconnect is say 10 feet or less. Just avoid interconnects that have high capacitance, more than say 50 picofarads per foot (pf/ft).

However, the other impedance-related issue I mentioned may be a more significant concern. The Bryston amps have an input impedance at their balanced inputs of 20K ohms. Which means that if you were to connect each channel to two amps via y-adapters, the DAC2 outputs would see a load of 10K ohms. That is low enough to be a concern, and I would not want to opt for that approach without first somehow verifying that the DAC2's output impedance is less than 1K, and preferably well under 1K, at all frequencies.

Regards,
-- Al

I can ask W4S about this if I decide to go in that direction. Thanks for the help and I have a better idea now of my options.

Seen it on here so many times that I cringe every time I see "biamp" in a title. It can be done but, in general, if you're asking, you shouldn't. Conversely, I encourage this learning experience for everyone and wish them luck. It's rarely simple and easy except if you're using identical amps, which defeats the purpose to a degree. Unless you're dealing with a really nasty load, like Kappa9's, the only benefit over adequate amplification is reducing the electrical reactance of the woofer affecting the other drivers which, to these ears, has only been theoretical.

Won't get into active biamping because that wasn't the question and I'm not writing a book. Not sure if I would tackle the 801's xover without DSP.

@ Ngjockey,

Why do B&W and hundreds of other manufacturers provide two sets of binding posts on their products?

Consumer demand, to sell more amplifiers, for bi-wiring?

Ideally, all speakers would either be active or come with an external crossover for use at line level. Westlake Audio and Naim provide external x-overs with their speakers, to name a couple.

In the pro market they use monitor controllers with adjustable x-over points. Most studio monitors are active these days but the bigger stuff typically isn't.

I assume that's a rhetorical question.