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Dunlavy SC-IVa how best driven

I have been driving my B & W 801s with Northcreeks crossovers with Audio Reasearch Classic 150s upgraded with infinicaps. My preamp is an Audio Reseach Ref 2. Does the IVs require more power to sing? Thus far i've been quite pleased with the performance of my system, but after hearing the IVas driven by an x350 combined with a tube front end, I knew I had to upgrade the speakers.
jwin

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jwin OP
101 posts
 
I am pleased that my Classic 150s will work well. I have loved these amps and the way their solid state front ends and 4 pair each of 6550C back ends provide the best of both worlds. I do have two more questions if you are kind enough to help out. It appears that the 4 ohm outputs should be used and with a room 16W x 17D x 11H what might the best placement be?
Thanks for your hel.
Jeff
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