B&W Variable High Pass Alignment Filter Setting.

I'll be honest with you,I had much better luck without the B&W filter. I chose to go without......I found the B&W filter actually hurt the overall sound in my system.

Thanks for your comment.
I'd still like to try it out and see how it sounds in my system.

Hklai: I had a pair of 801 series2 for many enjoyable years and found the B&W filter very noisy and irratable. Rather than fork over the extra $$$ for the Krell any other very expensive after market filters, I chose to go without.You may have better luck with yours.Also,many by-passed the IPOC ( I think thats what it was called ) which many said at the time was the biggest complaint about these great speakers..Great speaker have fun!