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Will this amp trick work for increasing bass performance?

I'm considering matching Focal Utopia Scala Evo with two amps for bi-amping, to separate bass and mid/high. 

I'm considering the Pass Labs XP-32 pre-amp, which has individual volume controls for each channel/amp. By slightly increasing bass amp volume over mid/high amp volume, I get to feel more punch from the 11" woofers. The crossover in the Focals cuts off at 220Hz, so only bass and sub bass are affected.

Which two power amps would you consider? Power amp budget is about $30K. Was told Focals like power, so >250W for bass amp seems the minimum. Pre amp will likely be Pass Labs XP-32.
Maybe Pass Labs X250.8 + X150.8 or X250.8 + XA60.8?

Your thoughts please? Any other ideas to get more bass performance from the 11" woofers in the Focals? Subwoofer is not an option. I know McIntosh has a pre-amp with equalizer, which would solve the problem too. But I always thought EQs are a no-no.
robert1976

Showing 1 response by erik_squires

erik_squires
16,733 posts
 
Heresy below:

1 - I find Pass does not so well with these speakers and low impedance.  A single amp from Ayre or Luxman may do better, not to mention a host of Class D amps.

2 - If you do insist on bi-amping, consider the Vandersteen trick, and put an EQ in series with the bass amp. 

3 - Of course, bass is greatly affected by proper room treatment.  Too many mid/high frequency reflections can tilt the entire response the wrong way.  Room modes can make the bass sound tubby or overbearing. Always a good place to start.

Above all, please yourself.
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