Bighead Posted September 5, 2019 Share Posted September 5, 2019 I am considering adding a third and fourth subwoofer to my home theater set up. My Klipsch R-112SW subs and the R-115SW subs that I want to add do not provide outputs so, Klipsch support told me that it is not recommended that I run more than two at a time. I am highly disappointed and surprised that Klipsch has sort of prevented their customers from easily adding more subwoofers. (If they had outputs, customers could purchase additional product $$$). I would prefer to add Klipsch subs as I do enjoy the sound (and look) but this has me considering buying subwoofers from another manufacturer. Has anyone added a third (and or a fourth) Klipsch subwoofer to their HT? If so, how did you go about it? And how did it work out? Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted September 5, 2019 Share Posted September 5, 2019 Nothing wrong with running 4 subs. Put one centered on each wall for best coverage or put one in each corner for best output. You can run 4 subs of any brand. Welcome to the forum. Quote Link to comment Share on other sites More sharing options...
Thaddeus Smith Posted September 5, 2019 Share Posted September 5, 2019 7 minutes ago, Bighead said: I am considering adding a third and fourth subwoofer to my home theater set up. My Klipsch R-112SW subs and the R-115SW subs that I want to add do not provide outputs so, Klipsch support told me that it is not recommended that I run more than two at a time. I am highly disappointed and surprised that Klipsch has sort of prevented their customers from easily adding more subwoofers. (If they had outputs, customers could purchase additional product $$$). I would prefer to add Klipsch subs as I do enjoy the sound (and look) but this has me considering buying subwoofers from another manufacturer. Has anyone added a third (and or a fourth) Klipsch subwoofer to their HT? If so, how did you go about it? And how did it work out? Splitters from your AVR sub pre-outs is where you will accommodate the additional subs, not the subs themselves. Quote Link to comment Share on other sites More sharing options...
Bighead Posted September 5, 2019 Author Share Posted September 5, 2019 I realize that I can use a splitter but what about speaker set up? When I run Room EQ won’t the two subs conflict with the set up? Do I just set the gain and frequency dials the same on each one and hope for the best? I’ve also read on some forums saying that depending on when the subs were built that the gain knobs can be set differently. Any idea about that? Quote Link to comment Share on other sites More sharing options...
Thaddeus Smith Posted September 5, 2019 Share Posted September 5, 2019 There's a ton of variables at play here and going with 4 subs isn't going to be just plug and play. You're going to have to roll up your sleeves a bit and dig into lots of forum threads and discussions and extract the bits which are relevant to your setup, brand of EQ, room dynamic, sub placement, etc. In my setup, I have only two subs. They're physically next to each other, however, and at the front of the soundstage - directly behind my main speakers. My AVR supports dual subs, but because of their physical placement I have them fed from a single pre-out, gain matched, and treated as a single speaker with regards to EQ and room correction. 1 Quote Link to comment Share on other sites More sharing options...
inMotionGraphics Posted September 5, 2019 Share Posted September 5, 2019 (edited) 30 minutes ago, Bighead said: When I run Room EQ won’t the two subs conflict with the set up? Do I just set the gain and frequency dials the same on each one and hope for the best? No, I think setting and hoping for the best is not going to get you your desired results. I don't run multiple subs yet myself, but I think most people use the miniDSP box: https://www.minidsp.com/products/minidsp-in-a-box for managing more than 2 subs. This will allow you to correct each sub independently. PS: Is Klipsch's defense, whether they gave you a sub out or you use splitters, it results in the same thing... unless I'm missing something... Edited September 5, 2019 by inMotionGraphics Quote Link to comment Share on other sites More sharing options...
Moderators Travis In Austin Posted September 5, 2019 Moderators Share Posted September 5, 2019 Here are the specs for Dolby Atmos Pro, you can extrapolate out what they are trying to achieve, what certified studios and mixing people who mix for Dolby Professional certified systems are putting into the mix and assuming the placement will be substantially close to. 5.4 Surround Subwoofer Placement The following guidelines pertain to the placement of surround subwoofers in auditoriums: • The distance from a surround subwoofer to an auditorium corner should be ≥ 1 meter. • For rear wall or ceiling placement, the surround subwoofers should be placed wider than the top surround arrays. • For front wall placement, the surround subwoofers should be wider than the left and right screen loudspeakers. • If multiple pairs of surround subwoofers are used, distribute the pairs along the length of the auditorium. For example, if two pairs are used, place one pair in the back of the auditorium, and one pair in the front half of the auditorium. • Avoid placing the subwoofers near any listening position. Placement high on the side walls or on the ceiling is best. The distance from each surround subwoofer to the nearest listening position should be ≥ than one-quarter the distance from the subwoofer to the RLP (defined on page 1). For a steeply inclined theatre (with rear seats near the ceiling), we recommend placing the subwoofers farther from the rear wall. [End of quote] The RLP is the "reference listening point" it is 2/3's of the distance back from the screen towards rear of room, centered left and right. Rear subs can be, and usually are of a different type and size in a cinema application, and their gain is set lower at the RLP than the front subs. The front subs are set 10db over the front main speakers, ( The point is, depending on what you are mostly watching, your AVR or processor, what you mostly have on Bluray, etc., you may not need identical subs, and even if they are identical, they may not be intended to operate at the same gain levels. Travis Quote Link to comment Share on other sites More sharing options...
Bighead Posted September 5, 2019 Author Share Posted September 5, 2019 I think you’re right InMotionGraphics. If they are chained it wouldn’t matter if it’s through the sub out or a splitter. Thanks for pointing that out. Dwilawyer, thank you for responding. The information you have provided is helpful and appreciated. 1 Quote Link to comment Share on other sites More sharing options...
yamahaSHO Posted September 5, 2019 Share Posted September 5, 2019 I ran 3 in my theater where 2 did not cut it. Worked out amazingly. Quote Link to comment Share on other sites More sharing options...
willland Posted September 5, 2019 Share Posted September 5, 2019 5 hours ago, CECAA850 said: Nothing wrong with running 4 subs. Nothing wrong with 5 subs either for HT but could not ever get it to blend "perfectly" for music. Bill 2 1 Quote Link to comment Share on other sites More sharing options...
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