Two subwoofers??


I have an MX-700 sub. I love the speed that the twin 8" drivers deliver, but I could use more "impact". I know that this sub is room sensitive, and it has been placed with care, so I am fairly certain that I am getting all I can from the sub. I have been toying with the idea of adding a second MX-700 (my wife does not know this). I know that you can gain up to 6db from a second sub, but I am worried about sound cancellation. My question is this:

Has anyone tried a second sub, and what were the overall effects?

and

For anyone that has a second sub, what placement is the best to avoid sound cancellation?

Love to hear from anyone whose wife is more understanding of this fun hobby.......
skidrhow
I've been using a pair of Vandersteen 2Wq subs for about 4 months, and wouldn't go back to just a single. It isn't just a matter of additional sound levels -- the quality of the deep bass is better. Also, in many rooms having a pair of subs also reduces problems of room loading, standing waves, and phase cancellation.

The Vandy 2Wq sub was actually intended to be used as a pair, but based on my experience, and others that I know who have 2 subs in their system, the quality of the sound is much improved with the second sub. If you can borrow a second sub to audition, I'll predict that you will like the results.
I've got a pair of Sunfire True Sub Signatures in my main system. I'm using them stacked, along a wall. I have adjusted the phase of one of them by ear to avoid cancellation with my main speakers. I've set the phase of the other one to be identical with the first one, so they will reinforce rather than cancel. It sounds pretty good.
I'm using a Legacy Pacemaker (2- 15" drivers with seperate enclosed 175 watt amps). One driver is left cannel, the other is right. There is no summing network to screw up the sound. -3dB point is 16 HZ. Works very well for me. Don