Axiom Home Page Forums General Discussion Technical Questions Graphs multiple subs multiple seats.

LOL!

Randy, I wish I had a magic solution for you. I do think you are on the right track. Sometimes I get so caught up with the SPL thing and room response and wondering if I have the phase set correctly and the crossover just right and gain at the right level I stop having fun. I've kinda tweaked the subs so they sound right to my ear and I've left it at that. Sure, there are problems with the system, but there is something in that "ignorance is bliss" saying. . .

I just think Randy's subs need more breaking in.

Yes, he should play the pod scenes from "War of the Worlds" on a continuous loop for 3 months straight. . .

Randy, along with your idea of not trusting SMS, do your ears confirm the results you are seeing on the graph when you move to different seats in the room and compare the same scene/song/etc.?

Is it so bad that it's worth all the hair-pulling you're doing moving speakers around (and the big extra investment you made in the new subs?). I'm sure you've considered all this already, I just feel for you and am trying to offer any tidbit of helpful advice I can that might take away from the frustration I can tell you're going through.

Not a problem guys, sitting on the couch upstairs drinking a beer right now and chilling.

Will head down in a sec to give it some more thought, trial, and error.

May try all 3 subs up front next. Just found a thread on AVS where man have this setup. Here is article as well.

http://www.sonicdesign.se/subplace.html

Just out of curiosity, why 3? I've seen 2, and I've seen 4, but I don't know that I've ever seen 3 before.

Good luck.

No particular reason, was debating over a single 500 or 2 350's, pricewise about the same deal.

Just got done placing the 600 dead center below my screen, and each 350 centered on either side between the 600 and side walls.

Let the graphing commence...

Look at this way. Moving subs saves you a trip to the gym.

Anyway, If it looks better at 180 phase then I'd leave it there. Also you can get more output from the 350s from room gain down low by moving them into the corners in front of the bass traps. It may make the peaks higher somewhere but its worth a try. Given your volume problems I would suggest installing the 600 into the SMS so you can have more control over the input signal gain.

Regarding the hum have you tried XLR cables between the subs or splitting the 600 from the 350s at the Denon to troubleshoot where its originating? Hum is very irritating and it may be worthwhile to attack that problem first.

It seems if I have all three subs plugged into the same outlet, doesn't have to be the outlet the other AV equipment is plugged into, the problem is pretty much not a problem anymore. I should be able to figure something out there, especially if I leave all three near the front stage.

There is not enough room on my stage to put the 350's on the outside of the 80's because of the traps. So I moved them on the floor a couple of feet forward, but clear to the side walls.

All subs calibrated to 73dB's individually, and speakers at 78dB.

With all subs in phase - prett flat from 20-40, big dip at 55 by 10dBs, back up to normal around the 80hz, then another big dip at 110.

With 600 in phase and 350's out of phase - still flat from 20 to 40 with a hump showing at 40ish, dip at 55 raised by 8dB's, dip at 110 still there but maybe a little better.

With 600 out of phase and 350's in phase - still pretty flat from 20 to 40, hump at 40 gone again, however instead of dip I have a valley from 45-63, and still have the dang dip at 110.

All subs out of phase - A little uglier than the previous setting.

I think I forgot to mention I have the 600 dead center up front as well.