B&W CM1 woofer popping? Too much power? - AVS Forum
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post #1 of 3 Old 07-03-2011, 05:34 PM - Thread Starter
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I am currently running B&W CM1's, a Rotel RC-1550 pre-amp, a Rotel RB-1552 power amp, a Pro-ject RPM 5.1 turntable with a SHURE M97xE cartriadge and a Marantz NA7004 network DAC which I run my Macbook through. A B&W ASW608 handles the real low end. All connected with Chord Company banana plugged speaker cables with more Chord Company quality interconnects.

Sound is fantastic at low to moderate volumes but the woofer on the CM1's makes a horrible popping / cracking sound when I turn things up louder (just under half way). It is especially noticeable on lossless playback through my iPhone via the Marantz NA7004.

I don't have the bass turned up or any equalizers (including Apples or Marantzs) in use.

If it is too much bass power being sent to the speakers is there a way I can channel the excess bass power to the sub-woofer to stop the CM1's over extending?

Many thanks
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post #2 of 3 Old 07-03-2011, 07:03 PM
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If you are indeed overdriving your main speakers, you can use a unit like this or buy a AV receiver that has adjustable crossover.

http://www.hsuresearch.com/products/...ss-filter.html

I would try 80Hz as a start and maybe even 100Hz for the CM1.

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post #3 of 3 Old 12-13-2011, 07:23 PM
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My crossover going to my CM1-s is set at 100Hz. At 80Hz I'd get a cone bottoming out on the limits like you described.
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