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What process did you use to integrate multiple subwoofers for 2 channel listening?

Today I will be trying to integrate up to three subs. Two are matching Rythmiks F12SE, and one is a REL R-328. The Rythmiks have a variety of adjustable parameters, including phase, crossover, and gain. There are other switches and passes on the sub, but I'm going to try to keep it basic to begin with. The REL has variable gain and crossover; the phase on REL is either 0 or 180.

I have REW for measurement. I will be buying a few more furniture sliders this morning, on doctors orders. ;-)

QUESTION: If you have multiple subs, by what process did you integrate your subs? One at a time? More? Which adjustments did you try first and in what kinds of increment?

I know that trial, error, measuring, and listening will all take time. Rather than look for a needle in a haystack, I'm curious what sequence or process was most effective for you.

Thank you.
128x128hilde45
hilde45's avatar
hilde45 OP
5,167 posts
 
Thanks. I have 3 subs. @millercarbon, I'm not sure what mistake you're trying to disabuse me of, but all I mean by integrate is make them sound good. Some of the technique won't just be listening but much will. From listening to moving/changing to measuring back to listening. 

you can set the crossover to about 80 and then adjust the volume levels.
That's a helpful bit.


@nonoise  Thanks for the reference.
@mmcely Thanks for sharing your technique concisely. I'll try it.

Just after I posted this, I found this very helpful and detailed discussion: https://www.thehifipodcast.net/episodes/episode-24-how-to-integrate-subwoofer


jtcf's avatar
jtcf
1,620 posts
 
I set up mine the old fashioned way - I put sub #1 in my listening position and walked around close to the walls while playing a track with deep bass.Quickly found the two corners where the bass was best and set them up there. Then it was a matter of trial and error over the next few days adjusting the settings.
I eventually moved one to a "null" corner firing towards the peak corner where it previously resided.I think it's smoother that way in my room. They are both behind me in the back corners totally unobtrusive. Anyone listening to the system marvels at the bass the little Harbeths kick out (heh,heh).
hilde45's avatar
hilde45 OP
5,167 posts
 
The problem I’m not able to solve, and perhaps the room’s physics make it impossible, is a +5db or more bass hump from about 73-92 hz. This is evident in REW and it’s also easily noticed with music. A tubby zone. The idea that one more sub would solve this is implausible. It will take a systematic approach to moving the subs and adjusting various things, and I'd bet a few hundred $$s that that fails too. But at least I'd know I had hit the limits of this room. Thanks for any approaches. I’ll ask over at the REW forum, too.
golfnutz
231 posts
 
I think you've nailed it your thread description - trial and error. It takes a lot of time to go through the various iterations, but viewing the measurements is well worth the effort.
If you haven't done it already, go to AVS forums and to the Rythmik thread and download Enrico's tip for dialing in their subs (it's in his signature).
Don't be afraid to use different volume adjustments, different frequencies, different bass extension filters for each sub. Experiment with room locations (ie different angles, even pointing the front of the sub to the wall).
Take notes (I added them to REW). It's all important so you know what works and what doesn't. Taking notes will help speed things up. Carpet slides are a great idea.
djones51
4,947 posts
 
Are you running any software you can apply EQ, should be fairly easy to notch
 70-90hz.  If you have the PEQ version of the Rythmiks put a -6db at 80hz,  measure and adjust. 
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