Your experience of moving to two subs


Hi all, I have a 2.1 system with the sub sounding best in the center between the loudspeakers. My speakers have substantial, deep, and detailed bass for their size and with the SS amp I’ve chosen. Thus, the sub’s optimal crossover setting is only at about 28hz. I have plenty of bass amplitude going on -- don’t need "more" bass.

I’m wondering about soundstage effects of having two subs on the outsides of my speakers, though. Having my sub in the center does result in some apparent compression of the low frequencies towards the low-center area. The L and R channels from my preamp are combined at my sub. I know some people may disagree and think that the source of frequencies below 60hz can’t be located by human hearing, but my experience tells me differently.

Does anyone have an opinion on the benefits of 2 subs vs only 1 when there’s no need for more bass oompf?

128x128gladmo

Heh heh.  I’m with ya man, and maybe that’s why Alon finally saw the light.  If Wilson uses subs with their Alexandrias, well…
 

 

The Rythmik Audio website's FAQ section that I've been re-reading since I bought my F12G sub seems excellent to me. One fine example:

( @soix )

"Cone excursion goes up 4x for every octave lower in frequency. So 40hz needs 4x more excursion than at 80hz. And large cone excursion increases distortion and in particular "intermodulation distortion" (higher frequency (small excursion) signal is modulated by low frequency (large excursion)). The correct way to address this is put a high pass filter (HPF) on front speakers in order to reduce the cone excursion. This issue is particularly bad for ported front speakers as you may notice with full range signal, woofer in ported speakers have far more excursion than that in sealed front speakers. With the cone excursion reduced, the distortion from the front speakers is also reduced and the sound becomes more dynamic and coherent."

Rythmik FAQ about Subwoofers

Rhythmik makes awesome subs and I hope the SB2000 (that I also own) can keep up.  My guess is it will and that once you get both subs dialed in you’re gonna reap sizable benefits.  Keep us posted!

I had one sub broken for awhile (I normally run two) and when I had one I had to really mess around with placement, crossover point etc. got the other sub back so back to two and the System just snapped right back into place. Sounded even and right again. All I can figure is only using one was making lumps in the frequency response and sometimes it sounded fine and other not so much.

now 28hz is pretty low and might not benefit as much. I was running 60hz at the time notes above.

@soix Haven’t tried yet, but the Rythmik F12G is so much faster than the SVS SB2000 that it’s really in a different class. Is a different type of technology altogether.

My plan for when I try putting them into play together is to use a copper power cable on the F12G that I know sounds slower and more smeary and an 11awg 7N OCC silver power cable (which I normally use on the F12G) on the SB2000 to attempt to split the difference in apparent rapidity of response. Not sure if the SB2000 will get anywhere close in speed because of the silver, but my testing in the past showed that it was very responsive to changes in power cables. Much more so than the F12G.