A friend of mine purchased 3 BIC subwoofers, a F12 about a year ago, and a pair of V1220's recently in the crazy low priced $97 each walmart.com deal. The subs were picked up tonight from the local wal-mart and we set them up in my room and proceeded to take some frequency response graphs.
This is kind of a sister project to the recent thread where I measured a pair of Klipsch RW-12Dhttp://www.avsforum.com/avs-vb/showthread.php?t=1390563
For this set of measurements - everything was setup the exact same in the as for the Klipsch tests. I turned off all external EQ in my Onkyo TX-NR 1007 receiver (no Audyssey, no Dynamic EQ, mains crossover set to 100hz, sub LFE set to 120hz) and just measured:
1) the BIC F12 by itself
2) a single BIC V1220 by itself
3) a pair of BIC V1220 subs
4) a F12 and a V1220 together
5) and finally all three subs together.
These frequency response graphs were captured in my 3500 cubic foot room using Omnimic. Distance calibrations in the receiver were accurately set. The frequency response graphs were all taken with no smoothing but averaged over 10 captures each from my main listening position. Here are some pictures of my room to get an idea of the setup.http://s1191.photobucket.com/albums/...20Room%202011/
The sub placement for these measurements is as follows:
1) F12 - Left side of projector screen with driver facing outside wall
2) V1220 - Left side of projector screen with driver facing down (standard config) and port facing outside wall
3) Dual V1220 - Both on outside of projector screen with ports facing outside walls
4) F12 on left side as in configuration 1 and V1220 on right side as in config 3
5) Dual V1220 as in config 3 sharing y split single sub1 output and F12 near center for room with driver facing forward on sub 2 output.
The placement chosen is the best/flattest position I've found in my room for duals.
Note: SPL interval is 2dB on every chart except the last one. (5dB intervals on Y axis is more common and makes the frequency response look flatter, but is harder to determine actual differences with precision)BIC F12BIC V1220single BIC F12 vs. single BIC V1220 - Frequency responses comparedBIC V1220 pairsingle BIC F12 and single BIC V1220BIC F12 and BIC V1220 pairBIC V1220 pair vs. Klipsch RW-12D pairBIC V1220 pair vs. Klipsch RW-12D pair with more common 5dB y axis spacing