Setting Sub Crossover Freq

For more thoughts, look at

http://www.hometheaterhifi.com/technical-articles/156--miscellaneous-ramblings-on-subwoofer-crossover-frequencies.html

FWIW, there is anecdotal evidence that some receivers still cut off the LFE at the crossover frequency.

http://www.avsforum.com/avs-vb/showthread.php?t=1232328

Thanks all for your input. I the case of polarity...I'm having trouble. Is there a precice way to know, other than by lisening for "more bass" ?

Mjmch, are you running through a high-pass crossover to main speakers and a low-pass crossover to sub, or are you instead letting the main speakers run full range and connecting the sub via line-level or speaker-level inputs from preamp or amp? These are two very different approaches. If taking the latter approach, you are only adjusting HF roll-off of sub, and would therefore want to do so at a frequency at or beneath the useful bass output of your mains.

Dgaarretson, I am running RCA outs from my pre into the RCA inputs on the Sub. (I'm running balanced from the other pre outs to my amp, which is then powering my speakers--full range).