For those seeking to maintain a fully analog signal chain and not lose any "bits" in the process of filtering your signal, these two "studio quality" units work wonders. They both have independent stereo channels of adjustment. Great for those using multiple channels of subs.I am only selling these units to finance another purchase. I will probably buy the exact same units again when I can. (Note the 2nd stock photo shows an XR-2001, which looks quite similar to the XR-4001 I have. I will try to post actual photos soon.) $300 for the XR-4001 4-way active crossover
$300 for the PQX-572 twin independent channel 7-band parametric I'm rating them 7/10 for cosmetic reasons. Soundwise, they are clean sounding. I'm only selling them to afford some rare used speaker drivers that have come up for sale. Otherwise, I would certainly keep these units and would prefer to hold onto them.
Review:
http://www.soundonsound.com/sos/1995_articles/sep95/ashlypqx570.html Manuals:
http://www.ashly.com/products/discontinued/manuals/pqx571-572-parametric-eq-r01.pdf http://www.ashly.com/products/discontinued/manuals/xr-1001-2001-4001-crossovers-r01.pdf
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