Bedroom HT sub set-up question

[Squishman]

My 11' x 17' bedroom 5.2.2 HT has Klipsch KG4's and four suped-up Minimus 7's for front height and rears. Subs are two 8" Yamaha's. One Yamaha has two 8" drivers and fits nicely laying on it's side under the TV table. The other, a single eight sits in a corner. I am thinking of replacing the corner unit with a BIC America 12" floor firing sub (it would be my third, as I have two in my 5.2.2 living room HT system). Is it ok to horribly mis-match the subs like this? They are already sort of mismatched, but it is sort of like 3 Yamaha eights, so not really. ha. Anyway, comments? I want to keep the one under the table as it sits amazingly well there.

 

[WaynePflughaupt]

Generally not a good idea. Here’s a case study with supporting measurements.

http://www.hometheatershack.com/forums/rew-forum/26478-please-provide-your-impressions-advice-my-rew-graphs-2.html#post244289

Regards,
Wayne A. Pflughaupt

 

[Squishman]

Thanks Wayne. Turns out, I still had some head room on both volume controls. It sounds ok now. Better than ok actually. Thumps pretty good. I will leave it be for the time being.
btw, I should have mentioned in my post about my two 12"ers that "as you know" in the living room. Because I got help here on this forum flipping them right-side down.
Two really nice systems, so I am happy. I live in a brand new mobile home, so this place rocks pretty good.