For you that use 2 dvd subs

dholmes

Wingnut & Grimster, both of you have 2 svs subs, did you try putting them together in the same location or do they sound better the way you have them in your pics? Having 2 svs subs sound better than one? thanks

PolkThug

I found corner co-located to be best.

dkg999

I have an SVS 20-39 PC+ in the front left corner, and an SVS PB-10 in the rear right corner. It takes a little work with the phase adjustments, and sound levels, but it really fills the room with bass impact at low sound levels.

dholmes

Thanks, I just ordered another svs sub,I dont have the room to locate them in the same place. Im going to put them in front between the front spks.

Ron Temple

When I was running split duals, I was able to get flat and had phenomenal bass(still do)...

VR3

Stereo subs is the way to go.

LFE is over-rated.

Systems

Vr3MxStyler2k3 wrote: »

LFE is over-rated.

How so?

I should add that I use 2 subs and they are placed in opposing corners(front left right rear) and are for the LFE channel only.

ABX

stereo subs spead out room nodes better.

Sherardp

+2 for dual subs, running dual PB12 PLus 2s paired with the SMS-1, that thing does wonders for bass. Both of mine are corner load on both sides of fronts.

VR3

LFE is a monorual (sp) signal --

So if you spread it out over two parts of the room, its just like taking the same signal and putting it in two places, can cause some major cancelation problems ---

With stereo subs, you basically get stereo sound, shouldnt have to many cancelation problems or anything like that ---

Besides... stereo subs are where its at... but remember I'm like 90% music... (if not more)

But if you are running LFE, in one corner, stacked is the way to go... 100%

I plan to, one day -- have stereo AND LFE subs..., LFE would only turn on during movies....

Stereo subs is the only way to go for music -- 100% I think.

ABX

I heard a lot of bass is mono anyway ?
Harman Kardon had an interesting read about stereo subs and sub placement if I recall.

VR3

not hardly... perhaps in movies...

But in music, the bass guitar can be one side, kick drum in the middle...

etc etc

Systems

Ok, at first I thought you where suggesting that the use of the LFE channel is overrated for use In an HT. The LFE content in some movies is important and with some the only good reason to watch them.

Studies have been done and volumes written about subwoofer placement and there is no absolute agreement as to the best place but many sub manufacturers suggest corner placement.
The need for stereo subs in a 2 channel system would be dependant on the actual crossover frequency .If you have small main speakers and the crossover to the subs will be rather high say 90- 100hz then stereo subs would be the ticket.If you have large mains and the crossover is in the 50-60hz range then a single mono sub should would be fine.

Here is the Harmon paper that ABX is refering to. http://www.harman.com/wp/pdf/multsubs.pdf

ABX

Yes, that is the one.

Serendipity

Vr3MxStyler2k3 wrote: »

LFE is a monorual (sp) signal --

So if you spread it out over two parts of the room, its just like taking the same signal and putting it in two places, can cause some major cancelation problems ---

With stereo subs, you basically get stereo sound, shouldnt have to many cancelation problems or anything like that ---

Besides... stereo subs are where its at... but remember I'm like 90% music... (if not more)

But if you are running LFE, in one corner, stacked is the way to go... 100%

I plan to, one day -- have stereo AND LFE subs..., LFE would only turn on during movies....

Stereo subs is the only way to go for music -- 100% I think.

+1

Stereo subs AND an LFE sub would be optimal.

Grimster74

Sorry, just seen this thread. For me, I had them corner loaded at one time and it sounded amazing. Once I purchased my SMS-1 and ran threw the setup routine I found it to have better results when placed closer together. Dr. Spec (a.k.a. Ed Mullen) is the one that suggested keeping them no further apart then 4-5 feet.

Face

You can separate them and still have them sound good. But you'll need to use room EQ wizard and a SPL meter to get both phase adjustments correct, otherwise there can be cancellation issues.

reeltrouble1

having two subs greatly reduces the risk of standing waves, for all out bass coverage go with eight, four on the floor and four in the ceiling, you can cover both the horizontal and vertical with this method. Each room is unique. I have used stacked psw 450's corner loaded with great success for HT, now I use two Polk SW200's with the Polk SWA-500 amp, this sounds amazing for HT, for overkill I may add two more subs in the rear of the room. If SVS is your bag then I would think they will be awesome.

Still not a fan for subs with my two channel rigs, but certainly nothing against those who like to use them for music.

treitz3

reeltrouble1 wrote: »

for overkill I may add two more subs in the rear of the room.

Good Gawd man! :eek:

VR3

I am curious if you guys have ever tried stereo subs before with your dual sub setups --

If not you need to --

Just to give you an idea....

I have my volume set to like 1/8 the way, which is VERY VERY balanced for my room and volumes, seamless blend...

Well I put on a chinese drum line -- big ol 60" bass drum is in the mix...

At about 3/4 up on the preamp, the big ol bass drum hit and you just grasp your seat and lean back trying to catch yourself...

Very very clear, effortless, authorative bass. At 1/8 volume, perfect depth and placement of a MASSIVE MASSIVE bass drum -- yet still had the guts to kick you in the nuts every time, clear as a bell...

To me, that is what defines subs -- the fact I have about 5/8 more to go on the volume knob speakers for itself ---

Just an awesome configuration with stereo subs - I highly recomend trying it....

reeltrouble1

yea Trey, the stereo PR in the SRS and four woofs in each of the Amazings......waaaaaaaaaa. I guess if I really had a need for sub stereo would be one way to try and blend things....

RT1

VR3

ah PR isnt the same! LOL

Th amazings got some bass -- wonder how they would handle the chinese drum line - thats some dynamic stuff

MSALLA

I need some education on this. How do you set up stereo subs? How would you wire that?

AdamRagland

by the way dholmes, did you mean to say dvd subs or svs in your title? don't know if you can edit titles just wanted to let you know. not trying to be a jerk:)

dholmes

Svs subs bad typer!

AdamRagland

it caught my eye when i was cruising the forum.. i saw the title and was like "oooo whats a DVD sub?!"

VR3

MSALLA wrote: »

I need some education on this. How do you set up stereo subs? How would you wire that?

Sorry I didnt see this

There are several ways --

In my case

I have two options

My preamp has 2 sets of preouts for the mains -- so I could run one set to my subs (or in my case, a sub amp) -- and the other set to my main amp

Second alternative, which I am currently doing -- is get a crossover to go between them, in my case a Paradigm X30 crossover -- run you mains and sub through that...

And of course you break the signal down into left and right...

dholmes

Well I got my 2 svs subs hooked-up & calibrated, I put them between my mains & used the Velodyne sms-1. the house shakes now I watched War of the Worlds it was A+ bass. My ht is concrete floor with carpet & it really pressurizes the room ,Im glade I got the pb12 +2 to go with the older ultra.

McLoki

I just got a second SVS 25-31. (the new one is a PC+ to go with my old CS+ - both are driven by amps of similar power)

I was hoping to get better impact, but due to room issues I am not there yet. I kept the second SVS because it brought to the table sound I did not think I needed.

My old sub sounded great and never seemed to strain. Now that I hear 2 subs (was running in 20hz tune both before and after the sub addition) in my huge room (about 12,000 cubic ft) I realise that even at the average volumes I listen to DVD's at (calibrated -15 to -20 demo at -10 with sub about 2-3db hot) it was apparently distorting and I did not realise it since it was such a step up from what I had before.

Right now the subs are co-located and I hope to be able to move them further apart to help with the room issues when I get the time to regraph things and put new curves into my BFD.

Right now - I am just enjoying them colocated with the same BFD graph I was running before.

Michael

bsoko2

I know that you all are not big fans of the HSU MBM-12. I am running one of those with a HSU 3.3 in max output and it sounds fantastic in a 6000 cubic foot room with two large openings on the left side into other parts of the house. The subs are placed 7 feet apart at the end of the couch and behind for nearfield location. In some cases you can feel the air move!

Bill

Ron Temple

McLoki wrote: »

My old sub sounded great and never seemed to strain. Now that I hear 2 subs (was running in 20hz tune both before and after the sub addition) in my huge room (about 12,000 cubic ft) I realise that even at the average volumes I listen to DVD's at (calibrated -15 to -20 demo at -10 with sub about 2-3db hot) it was apparently distorting and I did not realise it since it was such a step up from what I had before.


Michael

That additional headroom makes a huge difference in the bass presentation and blend with the mains. When I lent Steve one of my subs, it was immediately apparent I'd made a big mistake (sorry Steve). Running single for that month prior to getting the Ultra was a real strain.