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Old 08-15-2014, 10:38 PM - Thread Starter
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Sealed and ported sub in same room for home theater

I have an onkyo tx-sr608, EP2500, DSP1124P, AA AVA 18 in 8.75 cu ft @20hz . I ended up with a blown SI HT18, I'm thinking about reconing it and putting it in a sealed down firing box next to my couch. Sealed to keep it end table size, and next to the couch for more low end impact by the couch.

I have two questions.

1... Can I run a sealed and ported sub of different make in the same room?

2... It looks like my receiver only has processing for one sub, even though it says 7.2. Will that be a problem?

Here's the basic layout of my living room.


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Old 08-16-2014, 05:32 AM
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Originally Posted by hondakilla98 View Post
1... Can I run a sealed and ported sub of different make in the same room?
You may.

2... It looks like my receiver only has processing for one sub, even though it says 7.2. Will that be a problem?

It will. Mixing different subs is unpredictable, mixing different formats even more so. If you can separately process them it can work, but I wouldn't attempt it otherwise.

I ended up with a blown SI HT18, I'm thinking about reconing it and putting it in a sealed down firing box next to my couch

A driver that works well in a ported cab may not work well in a sealed cab, and vice versa. You will have to model it to be sure.

Bill Fitzmaurice Loudspeaker Design

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Old 08-16-2014, 07:22 AM
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With a receiver with Audyssey Sub EQ I think mixing is okay, otherwise I think it should be avoided.

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Old 08-17-2014, 05:13 AM - Thread Starter
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What if the second sub was a ported 15? What about adding a minidsp?
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Old 08-17-2014, 05:41 AM
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What if the second sub was a ported 15? What about adding a minidsp?
You'll get the best results with identical subs. You may be able to get a good result if they're not matched, but there's no guarantee.

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