KRK ERGO

Been looking into it, but concerned about possible latency issues. (time it takes signal to go thru unit) Not an issue if using unit full range, but problematic if using just for subwoofers (not intended use)List is around $799 & uses licensed lyngdorf technology. I'm using velodyne sms-1 sub-eq's now (3), but doesn't correct for time, just freq. aberations. Reluctant to run SOTA tube components thru a $500 processor box(Full range). SVS/Audyssey has competing product, but you have to use a AV pre with digital delays (or outboard digital delay) to sync up with main speakers due to 7.5 ms latency of processor. Ergo operates up to 500hz., not sure about adyssey. Have e-mail in to tech support at KRK about latency of ergo using analog ins & outs, but haven't recieved a reply yet.

Used as intended the Ergo shouldn't have latency issues,but used as an improvised subwoofer room correction device & not in the signal path of the main speakers, I would assume the 1024 tap FIR filter takes some time processing the signal & a few ms of time delay of the sub vs mains. The JBL looks interesting (& even cheaper). The manual isn't clear about the details of the RMC correction technology (how many filters etc), but looks more suited to use as a subwoofer "controller/EQ". Room treatment is probably best starting point. I've been experimenting with 8 12" subs (infinity prelude mts)divided between 2 channels at various positions & heights in the room (16x21x8'tall)in 3 zones controlled by 3 velodyne sms-1 controller/EQ's attempting to overwhelm modes (confuse them at least)& smooth overall response. None of the subs are "working" very hard with this configuration & more subs seems to smooth out room response.

Harman has the BASSQ on their synthesis/performance web page, but customer support says it never came to market. Manual is on line & some AVS members claim to have one. Manual isn't at all clear as to what type of "processing/EQ" it's up to. Sean Olive's research indicates the "listening panel" doesn't "prefer" flat "in-room" response anyway, so working my way thru Floyd Toole's book to gain more insight