Dual sub hook up?
Digital Daddy
Posts: 36
I have a VEL 12" and the D-box 10" that the VEL replaced and was wondering if I can hook up both subs by splitting LFE signal with Y-adapter?How would I calibrate the subs individually if they will both play when fed a test tone?In your opinion would it make a big difference with the second sub hooked up?
- RTi 70
- CSi 40
- r30
- r15
- Velodyne 12" sub
- H/K AVR520
- PS3
- Xbox 360
- Bell HD satellite 6100
- Samsung 4665 HDTV
Post edited by Digital Daddy on
Comments
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You will have to blend them manually between the crossovers. Each subwoofer will have a different setting considering the fact they will be on different sides of the room unless you plan to set them side by side and or stacked. Yes you can hook them up with a Y-Splitter. But I highly recomend you don't, your gonna run into alot of calibration to come. I suggest running one sub through your mains as Polk Suggests -- Speaker Wire --, and then run the other through the LFE. Calibrate the sub that is plugged in with speaker wire with the mains, make sure it blends to your liking, around 60-80hz. Many set it to 80hz, however I would calibrate it to about 10hz (IE: If your speakers only pick up notes 40hz and above, set the crossover at 50-55hz) before the Mains bottum out. This is me. Then I would plug in the other subwoofer via LFE cable
Then calibrate it to match the mains/subwoofer and then you will have a much fuller sounding setup. I suggest using a SPL Meter. If you don't have one
Ratshack sells them.
If you choose to hook them both up via LFE. God speed to you. It will be alot of calibrating, nothing a SPL meter can't shorten. It will be louder, the system will exstend no lower than your best subwoofer. The best subwoofer will last the longest (IE: The worst one will bottum out before the better, distort - etc). So It is mainly up to you. I would use the worst subwoofer wired tot he mains, mostly because it will not play at the same volume. The subwoofer once wired to the receiver (if im not mistaken) turns up with the receiver and receiver settings, and not the subwoofer amp volume controls. So it will not be as loud.
Correct me if I am wrong, or if it is wrong to do this. If you have equally good subwoofers --- Your worst subwoofer drops off a 30hz, so you could set your LFE subwoofer to pick up 40-50hz and below. In doing this, you will have a stronger bass region in the 40-50hz region and it will stop the worst subwoofer from bottuming out. I think you can do this, can anyone retaliate?- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit. -
Sid is right, mixing subs with different FRs will result in peaks where they are both strong, and depression where only one is strong.
To do it right would require doing FR sweeps, efficiency, and max SPL testing on each sub. Nothing that can't be done with an SPL meter, some sweep tones, a CD burner, and Excel.
After that, you might want to look at a cheap parametric EQ (like a BFD) on the inferior sub and try to make its FR look more like the better sub.
Or.......you could slam a beer, say 'eff this, and run a Y splitter off the sub out and stack em and calibrate the stronger one a bit louder than the weaker one and be done with it.
Doc"What we do in life echoes in eternity"
Ed Mullen (emullen@svsound.com)
Director - Technology and Customer Service
SVS -
Can we talk about room size and what series Velodyne you own?You might not need to go though all the mad of trying to blend 2 sub to work together in one room.I have found it not be a easy task,fun yes but can turn into fustration..........maybe not needed or worth it.
You you must I would stack em,I have had great results doing so.It looks crazy but works good.You have to set up one at a time by using test tone.Turn one all the way down set the level,then turn up the other untill the spl raises up 1 db,then back it down slow untill the DB is matched.Dan
My personal quest is to save to world of bad audio, one thread at a time. -
::Sid is right - Doc::
Gotta get my quote on- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit. -
Thanks for the help guys,but now it sounds like too much BS,will just stick with the VEL CHT 12".The VEL thumps pretty good but was just curious about dual hook up.
- RTi 70
- CSi 40
- r30
- r15
- Velodyne 12" sub
- H/K AVR520
- PS3
- Xbox 360
- Bell HD satellite 6100
- Samsung 4665 HDTV
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Originally posted by Digital Daddy
Thanks for the help guys,but now it sounds like too much BS,will just stick with the VEL CHT 12".The VEL thumps pretty good but was just curious about dual hook up.
since you have the subs... hookem up and give it a listen. If you don't like it disconnect it. If you like it leave it and in time if you would like to get into sweep tests then all the better.
HBomb***WAREMTAE*** -
Originally posted by Vr3MxStyler2k3
::Sid is right - Doc::
Gotta get my quote on
First good laugh since "my return"... Could be Doc doubled his pain med's...
DD,
Gotta agree with the Bomb-ster on this one. For the price of a Y-splitter, y-not give it a shot?More later,
Tour...
Vox Copuli
Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb
"Death doesn't come with a Uhaul." - Dennis Gardner
"It's easy to get lost in price vs performance vs ego vs illusion." - doro
"There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD -
WB Tour. LoL, I was shocked when I read that......lol!- Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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A call to Polk and they will likely say put one sub in front one in back. At least that was the advice I got. Alot of people urged me to stack, when I did I was really glad I did, my two 450's sound great, give it a try. You have the equipment, move it around and play with it.
