Originally Posted by sk5987
So I have an SB-1000 in the front corner. I also have an old MartinLogan Dynamo 300 that I'd like to use since it blends really well with the rest of my system (front: JBL L5s, rear JBL L1s, center: JBL LC1). I'm just not sure how to set it up, mostly because the Dynamo only goes down to 35Hz or so—it isn't exactly a "sub"woofer when compared to the SVS. I'll make sure to use Audyssey EQ after, whatever I choose. So,
1. I have to place it diagonal to the SVS due to room limitations no matter what, so should it go in the front corner or back since it blends well with the front speakers?
2. Should I use the Dynamo with its speaker-level inputs? (And where would I plug that in on my receiver?) Or should I keep it on LFE and use it as a complementary sub? (My receiver is 7.2.)
I have a couple of reactions, I will share. First, I would probably prefer to put the less powerful sub in the back corner, on the assumption that it will be a little closer to your listening position. Blending should not be a problem with either of your subwoofers if you have selected an appropriate crossover. Diagonal corners often work very well from a frequency response standpoint, so that part may actually be a plus.
You have a couple of different choices with Audyssey. If you have dual sub outs, with XT-32, there would be some advantage to letting Audyssey set distances and levels for the two different subs. But, Audyssey would stop EQing where the weaker of the two subs is down in volume by 3db, so that could knock out a lot of your low-end EQ for the SB1000.
If you don't have XT-32, with two sub outs, I think that the decision is even easier. I would simply run Audyssey for just the SB1000, and then after calibrating, add the Dynamo to the system with a Y-connector. That won't affect your Audyssey calibration at all, as Audyssey will never even know the second sub is there. The disadvantage of course is that the Dynamo will be EQed in the same way that the SB1000 is. If the Dynamo has any built-in DSP, you could set a Low Pass Filter for about 40Hz. But, doing it the way I suggested will also allow you to easily A/B your sound to determine whether the Dynamo really adds anything to the overall sound quality.
Anytime you try to combine two mis-matched subs, you may like the result, or you may not. But, I do think it is easier to mismatch sealed subs than it is ported subs. As for where to plug the Dynamo in, I would probably try it on the normal LFE setting, unless you know of some specific reason to do it another way. In that case, you can just experiment to find out which sounds better to you. I hope this helps!