While we all know that Apogee's are phenomenally tough loads, i once saw someone running bridged Perreaux 2150's on them and they did this for many, many years. Since bridging and low impedances typically create havoc, that should tell you something about how sturdy these amps were. If memory serves me right, i also think that someone from Audiogon was running a similar set-up but i can't remember who. Either way, i just thought that i'd throw that out for something to chew on. Personally, i would choose a 3150 or something newer in the Perreaux line over one of the 2150's. MUCH warmer and smoother sounding. Sean
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