3 subwoofers, center sub uses crossover to split frequencies

[olds1959special]

Anyone doing anything like this? I have L/R subwoofers underneath each speaker, but then added a third subwoofer to the center. The center sub does not play as low, and only has single ended inputs, so I hooked it up from the RCA outputs of each subwoofer, after turning down the LPF on the L/R subs to 50 Hz. So now, the L/R subs play 30-50Hz and the center sub plays 50Hz - 80Hz. I'm not sure what the point of this is? It's fun to try out weird things.

 

[Hendrixon]

I have a sub on my center channel.
My center "speaker" is actually a pile of 4-5 way dsp crossed active setup.
First, my receiver doesn't allow a center channel without crossover, so the minimum is 40Hz and that goes to the main sub.
Above that I have a dedicated powered sub doing 40Hz-85Hz, why? because I found this range muddies the vocals chestiness and that way I can have deep vocals and control the "mud".
Above it, I have an old passive small sub that excel in vocals chestiness, it covers 85-350Hz.
Above that I have the mid and tweeter area, here sometimes have a small monitor with its own passive crossover, or a different monitor with active crossover from the dsp to the mid and tweeter.

What I found is that the center sub, even doing just 40-85 and only audio from the center channel? actually works more than the main sub doing the LFE and all others speakers lows combined. I wasn't expecting that.

 

[Redacted]

Why not, but you do need a means of equalizing the FR across all 5 speakers!
If you don't, you'll get weird boominess on some music.

 

[john61ct]

If the Center is actually fed a different signal I would keep all the speakers there separate from L/R

Not all content sums bass to mono.

For films, Center should be tuned to higher SPL than L/R, especially the voice/presence and bass frequencies.

Of course that means the amps ans speakers SPL capacities must be CAPABLE of exceeding that of L/R