How to integrate a sub into existing theater setup with 3 subs?? - AVS Forum
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post #1 of 8 Old 11-12-2013, 07:07 AM - Thread Starter
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I just moved into a house with a dedicated movie theater that has the following subs installed. 2 JBL S120PII, 1 BIC VK12.

I have a mfw 15 turbo with the dayton amplifier that i was using in my previous setup. How do i make all these subs work together?

How would you set these subs up for optimal performance?

Is the mfw turbo going to overpower the other subs and make them unnoticeable?

Should i remove the subs and just have the one mfw turbo?

I am really looking for some clarity on how to proceed.

Thanks
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post #2 of 8 Old 11-12-2013, 10:26 AM
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I would start by putting the subs in decent spots. Spread them out. Run audyssey or whatever room correction software you have and see how it sounds afterwards. If it sounds good, you're done. If it doesn't, you'll need to move them around until you find spots that sound good.
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post #3 of 8 Old 11-12-2013, 10:52 AM
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I would start by level matching all the subs to around 72-73 db at the primary LP. Do this one sub at a time and check to see that the combined spl is going up 1.5 to 3 db to rule out cancellation. Then run room correction. This is very doable but, may take a little time. This is the procedure that I have used integrating 3 non-identical subs. Because you will be using 4 subs, you may gain significant headroom in the system and over driving a sub will not be as major of a concern.

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post #4 of 8 Old 11-12-2013, 07:07 PM - Thread Starter
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if i put them all at 72 or 73 is that not limiting the mfw turbo that outperforms the other subs hand down. what i am asking is will the turbo ever get to its potential in that setup.
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post #5 of 8 Old 11-12-2013, 11:07 PM
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You don't need that has a goal. The three sub will smooth out the room response and increase headroom for the system. Each sub will perform better and not work as hard. Unless you like running the system out of balance compared to the rest of the speakers, you should see an improvement. Try it an see how you like it. The goal for HT is good bass and LFE, not an out of balance system. I prefer good clean bass to more extension or spl . You don' need a lot of rumbling and bloated bass which you will get tired of.

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post #6 of 8 Old 11-13-2013, 09:24 PM - Thread Starter
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if using the 4 subs that way is it not pointless to have the turbo in that setup? it seems like i would be better off just having another jbl as the turbo will not ever get pushed at all compared to the other subs
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post #7 of 8 Old 11-14-2013, 01:27 AM
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Read Earl Geddes paper on the use of multiple subwoofers: http://seriousaudioblog.blogspot.com/2012/05/two-great-articles-on-multiple.html

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post #8 of 8 Old 11-14-2013, 06:44 AM
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The only way to know for sure what's going on with the acoustics in your room is to measure. Once you have a tool like an OmniMic or REW in-hand, then you can measure and compare the frequency response with different placements. Then you will know what's best without playing a guessing game.
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