Does a Sub for Wilson Sophia II make sense?


I went from Martin Logan Electrostats, Aerius, with Genesis sub to Wilson Sophia II. Even with the Aerius, it was no trivial matter to integrate the sub seamlessly. I have a rather large room 18' by 36' with some large openings as well. Based on the measurements by Stereophile, the Wilson's start rolling off around 50 hz. Has anyone tried to integrate a sub with the Wilson Sophia? Also any suggestions on sub is also appreciated. What I was thinking is full range to the Sophias and filling in from 20hz to 50hz with an active sub and adjustable crossover. I listen to records exclusively, all types of music, but mostly rock and then Jazz. My system is
VPI Classic 3 Dynavector XX-2 MKII, Avid Pulsus phono stage, Acurus RL-11 Preamp, Music Reference RM-9 MKII amp (Genalex Gold Lion KT77 and Russian 6922) and Sophia II speakers.
Thanks in advance for any help.
captain_winters

Showing 3 responses by irvrobinson

Because of room modes causing peaks and dips in any speaker's low frequency response, increasing the number of bass sources smooths out the in-room frequency response. Your speakers can be flat to 20Hz, but if you can't position them for minimizing room modes what you actually hear may not be very good. It is also advantageous to have an effective level control for bass frequencies. So in my mind it is a rare room that doesn't benefit from one or two subs. This is just simple physics. I'd rather position my main speakers for best imaging and move the sub(s) around to get the bass right.
What sort of source were you measuring? Pink noise? White noise? Warble tones?

It looks to me like your entire bass range from 200Hz downward has problems, and low-bass is out to lunch.
That probably means you have some real bass problems. It might help if you get a better measurement system, like the Dayton Audio OmniMic from Parts Express.

You need at least one sub, you might need two but I'd buy one first, and it looks like a good low-pass frequency is at least 120Hz, maybe higher. Maybe as high as 200Hz. You'll have to experiment. A suck-out in the 100-250Hz range makes everything sound thin.