AudioRoundTable.com - RDF feed
type: channel
description: Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
items: Multible subs.
items: Re: Multible subs.

Multible subs.
type: item
description: If you use 2 lab 12s in a box does the SPL go up by 3 DB ? Like one lab-12 would be 92 db at one watt and two lab-12s would be 95 DB at one watt one meter ? Thanks
creator: Wayne-o
date: 2009-10-24T22:34:33-00:00

Re: Multible subs.
type: item
description: Yes, that's right. You'll get a 3dB increase if power remains constant and a 6dB increase if voltage remains constant. However, if you are distributing the subs (as I think you should) there is some wiggle room here. You probably won't get quite as much summing because you're looking for a mode averaging effect. But that's practically a semantic argument because in practice, the increase is nearly the same as you get in tightly packed clusters. Damping is much more an issue than summing when you're trying to estimate SPL in room.
creator: Wayne Parham
date: 2009-10-25T03:05:21-00:00