The Vandersteen 2Wq crossover technique is definitely unusual.... It looks like a high pass filter is used before the the main power amp as usual, but then this amplifier's output is sampled and the low frequencies boosted to drive the sub amplifier. Any colouration in the main power amp's characteristics at <30Hz will be present in the sub output, which the vandersteen spec suggests is desirable!
My experience is consistent with konut's suggestion. I used a 1st order crossover for a few years, but now use a line level 4th order crossover at 60Hz and would not go back. The 1st order setup took alot of tweaking to avoid phase issues in the crossover band, and having the sub produce any higher frequency output (frequencies where the human ear is directional) makes it harder to hide. That article also has some comment on frequency response equalisation. It dismisses active room correction as expensive and with "too many negative side effects", and suggests that room response can be adequately managed by tweaking placement and crossover frequencies. That's a fairly unusual opion to see expressed in an article about subwoofers! Placement is important of course, but it alone cant compete with active correction based on in-room measurements. With squeezeboxes we have several excellent low cost room correction options that should not be ignored. -- htrd Toby Dickenson Your last.fm profile mashed with eBay; www.exitahead.co.uk ------------------------------------------------------------------------ htrd's Profile: http://forums.slimdevices.com/member.php?userid=3710 View this thread: http://forums.slimdevices.com/showthread.php?t=67022 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
