OK, all you dbx Driverack'ers out there - a question: What are you applying for delay to your mains to time-align with the subs?
I was working into new rackgear this afternoon - the KT DN9848 http://www.klarkteknik.com/dn9848.htm - which took months to get, touring season and all... So I was time-aligning my smaller mains and reflecting on some dialogue on ProSoundWeb where many report routinely applying a 6-8ms delay on the mains to align with the subs (before they delay the system for backline or room position, etc).
Tonight I confirmed it once again - a full 2.66ms (3ft) delay was needed to time-align the mains with the subs. There is no other processing in the signal path - this is needed delay that is imparted by the crossover(s).
Here's my set-up:
EV QRx 118s sub and QRx 115/75 (running bi-amped, with the 2-way Mains in passive mode) positioned in factory placing atop the sub, Earthworks SM30 positioned at 7-ft, on-axis. Using SmaartLIVE's Impulse function, the subs were (repeatedly/continuously) sampled independently from the Mains, and the arrival difference noted.
The subs were acoustically materially behind the Mains. No news there, but I realized I do not employ this technology in the home on the 4345's - there I use an analogue crossover and no DSP.
So, I wonder, what do you Driverack'ers do, at home - do you know?
OK - some pictures...
- Infredible - what delay are you using between the LF and MF/HF on those 4343's?
- Widget - do you know if the DEQX is employing any time-alignment, and phase adjustment?
1) The small stack (one side, only) - no, this is not Pancake House...
2) SmaartLIVE Transform function, full range, after applying the 6-band parametric to the DN9848 "Outputs"
3) Face of my combined "drive" and "FX" rack - from the top: TC M2000; DN9848 DSP; DN370 EQ; DN514+ 4-channel gate; DN500+ 2-channel C/L; Ashly CLX-52 2-channel C/L, etc.... NB: I was only using Channel 1 (Left) for this - note that both Channels of the DN370 EQ are bypassed (Red LED to right of Channel faders); and only Outputs 1 (L-Sub) and 3 (L-Main) are active (lit) on the DN9848. None of the Inserts are active...
4) SmaartLIVE Impulse, Mains (here includes a global, system 10.07µs delay I was playing with, exploring the "Haas Effect" - but that is subject of a future Thread...)