Two Subs?

gce

I have my new sub ordered (SVS PC12-NSD). I'm replacing my Klipsch that is on the front stage right side. There is no room for the SVS up front so its going on the rear stage left side. Got the cable run and I was thinking why not leave the Klipsch hooked up and dial in two Subs, the recever has 2 sub outs.

So my question is would this sound good or should I just take the Klipsch out of the picture and let the SVS do the job?

falconcry72

Bass response is very room dependent, and every room is different, so there's really no right answer. Dialing in 2 subs is definitely more tricky than 1, but that doesn't mean it won't be beneficial.

I would setup just the SVS by itself first, to see what it's capable of, and then see if you can improve things by adding in the Klipsch. If you go straight to running both, it may sound better than the Klipsch by itself, but not as good as the SVS by itself, and you wouldn't know it.

Experiment and see what works in your room. Good luck!

chris23120

I would try it out. Technically i run 6 subs..LOL Although the center channel sub is crossed over at 60hz and the left and right towers subs run on the Large setting L/R front on the tuner so only 3 run on the LFE. I have a large room and find that it sounds much better with all the gains low but having a huge amount of headroom so its amazing when some random bass hits during a quiet scene in a movie and your drink moves.

-FROG-

Gotta experiment and play around with real time audio tests.

VR3

If your SVS peaks out at 110db and your Klipsch at 105db, the Klipsch is doing nothing...

I would sell the Klipsch

spock 2054

gce wrote: »

I have my new sub ordered (SVS PC12-NSD). I'm replacing my Klipsch that is on the front stage right side. There is no room for the SVS up front so its going on the rear stage left side. Got the cable run and I was thinking why not leave the Klipsch hooked up and dial in two Subs, the recever has 2 sub outs.

So my question is would this sound good or should I just take the Klipsch out of the picture and let the SVS do the job?

Your setup, as far as sub placement is identical to mine. Try it. I have my Velodyne DPS 12 rear left and the Polk PSW110 front right. Sounds fine after running Audyssey on my Onkyo 809. Have you run YPAO on your receiver with both subs yet? That SVS sub is a odd, but good looking sub. Ever thought about two of those?

Airplay355

I've heard a good way to put too subs in a room is to place the first sub where you want it (or where your wife lets you put it). Then walk around the room to find the spot where the bass is quietest and stick the other sub there.

-FROG-

VR3 wrote: »

If your SVS peaks out at 110db and your Klipsch at 105db, the Klipsch is doing nothing...

I would sell the Klipsch

You don't think the second sub may be a solution to covering dead spots, depending on how "live" the room is? My Theater room is not crazy big, but the back side of it runs into 2 more rooms and an open pathway to another few rooms. Not to mention all wood floors... I had two 12's up front which "should be" more than enough but experimenting with placement, the bass still ended up in all of the other rooms. I got my hands on a Cerwin Vega down fire 15" and set that in a 3rd corner and it helped tremendously! Recently I sold the two 12's up front and got my hands on a set of Cerwin Vega 15's and the problem is solved with the dead spot where I sit. The only down side is it has knocks stuff off the walls and breaks them. I guess my point is, maybe the second sub would benefit in some way depending on the room setup?
*This coming from a guy that once had two 18" subs in his car, so the demand is high for extreme bass*

gce

Tried the 2 together and then unplugged the Klipsch. I now have more room in my living room because the Klipsch is out of the picture. The SVS kicks ****...I'm very happy with it!!! :cool:

gce

Now I know my bass is setup just right. Listening to some music and my wife asks me "Do you think there's to much bass" I say "No, why" she says "cuz I can feel it".

-FROG-

Good stuff.

20hz

Ps my wife does the same thing " why does it have to rumble so much"
I always ran 2 subs first it was one under each main as a speaker stand then I moved it to the cornor and new DIY sub was much lower and deeper than the 15" dayton quatro but I still run it at a lower gain to add fill to my room .
The Big sub was in the cornor and the15" on the side of the tv I was watching the movie stargate the scene when the spaceship takes off I went up there to adjust position on my center speaker so I was standing between the subs well the bass hit I felt the floor wave and my stomach turned , it was intense .

-FROG-

20hz wrote: »

Ps my wife does the same thing " why does it have to rumble so much"
I always ran 2 subs first it was one under each main as a speaker stand then I moved it to the cornor and new DIY sub was much lower and deeper than the 15" dayton quatro but I still run it at a lower gain to add fill to my room .
The Big sub was in the cornor and the15" on the side of the tv I was watching the movie stargate the scene when the spaceship takes off I went up there to adjust position on my center speaker so I was standing between the subs well the bass hit I felt the floor wave and my stomach turned , it was intense .

You should do a frequency sweep and see where the resonate frequency is! I have a cool "Function Generator" app on my phone and LOVE sweeping subs! :eek:

chargerman426

Really depends on the subs. I had an Outlaw sub than bought an SVS. The Outlaw couldn't keep up with the SVS so I got rid of the Outlaw.

dorokusai

I'd say based on the information provided, stick with the SVS only and sell the Klipsch. If you have two subs in different areas you are creating more problems, as mentioned above and unless you're getting some room correction gear or software, it will get worse. It's just not that easy and even harder to incorporate two different subwoofers into the same room without electronic help.

The SVS is more than capable of handling the room, go with it.

Mark

McLoki

If you decide you need more bass, sell the klipsch and get another SVS. (same as what you have) If you are fine with the bass you have, move the Klipsch to another system or sell it.

Either way - dialing in 2 different subs is a nightmare. with 2 of the same subs, you can choose a 6db gain (putting the subs together) or a 3db gain (moving the subs apart - but an overall smoother room bass curve)

Enjoy,

Michael.

ss1

Svs it is

20hz

I got a strke disc its basically a freq generator , how would I know the resonate frequency ?
I have done 20-100 hz , I just do it to check where the db drops at 20 hz , I think it was 9 db .
Its a true sub !

-FROG- wrote: »

You should do a frequency sweep and see where the resonate frequency is! I have a cool "Function Generator" app on my phone and LOVE sweeping subs! :eek:

20hz

now I put all subs in the cornor with one amp feeding the set ( its four 12" in a isoberic clamshell cabinet )
I had dialing in problems before but hopefully all cornor loaded solves it .
As long as the window wont break above it .

mwk455

let us know what you do .

SugarmillMan

mwk455 wrote: »

let us know what you do .

Ditto. Getting two subs into a living room or family room space is sometimes a tough one. The WAF factor is going to be a tough sell in most cases. With smaller subs you may fair a little better but for larger subs, it's a challenge.

chumlie

mwk455 wrote: »

let us know what you do .

See post #10 & 11.

be83663

I would recommend two identical subwoofers one next to each front speakers. Definitive Technology's BP7000 speakers, $2,500.00 each is what every speaker companies are striving to make after; and those speakers have a built in subwoofer, one for the Left speaker and one for the Right speaker. If you have a bookshelf or 2-way or even 3-way Front Speakers that you need subwoofer for, then imitate what the BP7000s are doing and put one subwoofer next to your left front speaker and another subwoofer next to you right front speaker. It will be well balanced that way for a much better theatrical sound!!!

gce

Thanks for all the help and suggestions guys. I've had the SVS for a month or so now and found out that's all I need in the room it's in. All I can say about this sub is it kicks **** when needed and puts out clean tight bass the other times.

Face

be83663 wrote: »

I would recommend two identical subwoofers one next to each front speakers. Definitive Technology's BP7000 speakers, $2,500.00 each is what every speaker companies are striving to make after; and those speakers have a built in subwoofer, one for the Left speaker and one for the Right speaker. If you have a bookshelf or 2-way or even 3-way Front Speakers that you need subwoofer for, then imitate what the BP7000s are doing and put one subwoofer next to your left front speaker and another subwoofer next to you right front speaker. It will be well balanced that way for a much better theatrical sound!!!

Not true at all.

Toolfan66

Face wrote: »

Not true at all.

+10000000000

I have two subs in my HT, one in the back and one to the side of my room, I have them dialed in so good that you can not tell where the subs are in the room when being played..

With that said I don't think I would want to tackle two different sub manufactures. not saying it can't be done cause I don't know, I'm just to anal when it comes to putting things together. I want it all to match not just in sound but aesthetics as well..

newrival

Two subs will always be better than one (given comparable performance) to help smooth frequency response.

newrival

be83663 wrote: »

I would recommend two identical subwoofers one next to each front speakers. Definitive Technology's BP7000 speakers, $2,500.00 each is what every speaker companies are striving to make after; and those speakers have a built in subwoofer, one for the Left speaker and one for the Right speaker. If you have a bookshelf or 2-way or even 3-way Front Speakers that you need subwoofer for, then imitate what the BP7000s are doing and put one subwoofer next to your left front speaker and another subwoofer next to you right front speaker. It will be well balanced that way for a much better theatrical sound!!!

This is ridiculous. Subwoofers within the cabinet are space saving compromises and have been utilized long before the bp7000.

newrival

It seems to me there are few people commenting that actually understand the reason for multiple subs. I'm even surprised by doro's comments, considering the regard I hold for his experience. If the subs are the same delivery type (sealed/ported/bandbass/IB/whatever) and are of at least decent quality, you are much better off having more than one. Nearly invariably.

Two subs aren't for getting you "more sound" (unless they are benefitting from coupling, and you need the extra headroom), it gets you smoother sound. Multiple subs is about frequency response smoothing and combatting room nodes. And, no, the subs don't have to match, they just have to be level matched and crossed over similarly, which is pretty simple.

To the OP: if you played a wave sweep, I would bet that with your one sub you would witness from the listening position the bass get louder and quieter as the frequency changed. This is do to room modes, nulls, etc. A second sub in a different location will have different points where the volume comes in and goes out. The point of using them both is so that you benefit from the overlap. The low points on the on one sub will likely not be the same frequency as the other sub and so the two exhibit a smoother frequency response. Additionally, Pressurization is much easier to achieve and allows for more headroom. The two subs are sharing the duty of moving air and the less a driver has to move to achieve a given level, the better. (I am speaking simply and generally here, of course)

newrival

VR3 wrote: »

If your SVS peaks out at 110db and your Klipsch at 105db, the Klipsch is doing nothing...

I would sell the Klipsch

I wholly disagree. Those numbers don't account for room gain, and you don't know what levels the OP is achieving nor listening at. It may be true, but without measurements, that advice is just a stab in the dark

dorokusai

I'm not sure why you're surprised Newrival? I based the comments on what he asked unless I missed something later. I would not try to integrate two subwoofers from two different manufactures, even if they are close in spec....which in reality of hearing both of them, they are NOT. Unless you want to arbitrarily wing it with the rear panel connections on the back, and the use of the AVR for the rest using some rough room correction preset guidelines, well, by all means go for it.

It's certainly possible and it's been done here and elsewhere but you're commenting as if you know his room, current sweeps and all kinds of information based on his few posts.

I don't see any reason to not simplify, use the better subwoofer and if you want to and are so overwhelmed to use both, get some real room correction subwoofer device to work all that out....again, which will be interesting to do if you can't even make the decision of what subwoofer to keep in the first place.

I mean no disrespect to the original poster but I'm trying to keep it reality based and not toss advanced level room correction, a possible new device and expense and some frustrating time spent on this forum and perhaps others trying to figure out why it doesn't sound good or why at 40hz his wife accidentally craps her pants at 6pm every night.

I'll just drop out and let you two sub experts rock and roll since I'm out of my mind I guess.

Good luck.

Mark