Originally Posted by DrewB
I'm currently running the VTF3-HO (nearfield and behind the listening position) and a really old Velodyne CT-150 up front with the main channels. This should really be the reverse but the HSU is too tall with with the turbo and would block a portion of the screen.
Bottom line is one of these subs will be replaced by a 118...just not sure which one. I'm thinking of the following scenarios:
1. Get rid of the CT-150 and use the 118 up front, laying on its side.
2. 118 up front, get rid of the VTF3-HO and use CT-150 behind listening position as an MBM
Of course the 3rd option would be two 118s but I would like to experiment with the above two options first because I think two 118's might be overkill for my room. I can always upgrade to another 118 at a later date if I feel there is a need for it.
I wouldn't pretend to give "advice" but would like to share some HO/thoughts:
You never know
how a subwoofer sounds and acts like until you have it in *your* room
, primarily because room interaction
dominates below Shroeder/transition frequency (around 300-400 hz in most room and drops with room size, becomes basically non-issue in large commercial theaters), and secondarily because of varying taste/listening habit/system/etc. You could have educated guesses, but bottom line is you need to get it IN there. So at the risk of Jeff getting mad at me (JK), I agree buying only one 118HT is a good place to start especially for small rooms.
Given that one could never be sure, then why do I rec. JTR? Previous users' & reviewers' (databass, hometheatershack) reports allow an educated guess: it's likely the most powerful and "clean" subwoofers you could get at each price range, both subjectively and objectively. I've also noticed that experienced bassheads always tend to move to bigger, and nearly never smaller driver, so there's the reason for joining the 18 incher club. I know enough to not guarantee anything when it comes to audio, but JTR is a good place to start.
IMHO, one thing to consider regarding mixing
subwoofs is, unless they are of somewhat similar quality/capability
(ideally you want them to be, in my case JL Audio and JTR), it's a good idea to turn down
the gain and range of the lesser subwoofer
and let the JTR do more. This allows the lesser subwoofer more headroom and hence less chance of distortion when that explosion hits, and allows the better sound of JTR to dominate. The lesser subwoofer should contribute positively (room distribution and SPL), not negatively (add distortion/"bad sound").
The MBM concept seems extremely fun. Using the Velodyne as such, does it contribute to the sound (also how loud is this sound and how good is the quality)? If it contributes to the sound too much, then I would keep number 3 above in mind. Does adding tactile response affects sound adversely IOW.
From observation of previous setups by pro's and experienced users, my vote is for 1 front wall, 1 back wall, the one in the back close to and behind MLP, preferably the JTR. A very smart and experienced pro (initials MS, friend of Jeff) once taught me an important step with front + back setup is to adjust delay of front vs back subwoofers
to obtain smoothest in room response (and if you don't have measuring equipment, perhaps the setting that sounds loudest/best?). I have Theta Casablanca SSP, will Y split my JL and JTR & position subwoofers, and will let Dirac take care of adjustment from there.