Dual subs and room size


Hi. I've been considering dual subs with speaker input to pair with my Martin Logan 35xt's and not sure what I should be considering in relation to room size. My room is 17' X 10' with the equip along the long wall. I've been looking at SVS sb1000s and HSU vtf 1/3. The SVS are 12" sealed vs 10" ported hybrid for the HSU. It was suggested that I go with no more than 10".  They will support 100% music. The speakers are pretty much an 9' equidistant triangle set up and would be looking to set the subs on the outer side of the standmounts. Any thoughts or advice would be greatly appreciated. Thanks, Dave

italian

Showing 4 responses by wattsperchannel

Again, assuming your quest is a flat FR and not just volume I disagree. EQ can't fix nodes only constructive modes (antinodes). You will be happier with two half price subs versus one full price subs all else held constant if your goal is flat FR. If you just care about volume one sub in the corner of that size room will rock your world unless you sit in a node.
The number of subs has little to do with room size or volume. You want multiple subs to get a flat response by canceling room modes. (Two minimum and three preferred.) Read the stuff by Geddes. It is pretty well established science. Use attenuation to address volume to taste after you are flat.
I hate to see you make a mistake due to some of the advice here. If you listen to music you will be much happier with the flatter FR and integration from 2 lower priced subs versus one higher priced regardless of your budget (as long as you are at a minimum quality level like the SVS you are considering). The improvement from the second sub is NOT about SPL's it is rather these other sound quality improvements and EQ alone will not get you there. You set the SPL's to your taste so you have no worries about being overpowered. The opposite occurs when you eliminate room modes via the second sub.

Regardless of what you are hearing this is not disputed in the scientific community. Do a little homework on room modes, nodes and antinodes and how standing waves behave below 60hz given that most room treatments have little effect in this range. You won't regret it.