[sugbob21]

i am sure this topic has been talked about ,but is there an optimal placement to put one sub with my super 6 alnico monitore? Should it be inside the speakers, in a corner, outside the speakers, infront of or behind ?

[DaveBSC]

Subwoofer placement 101 goes like this. Put the sub where the listening position is. Then play some very bass heavy test tracks and/or put a LF sweep test track on repeat, and walk around the room until you find a spot where the bass response sounds the most even and natural. Put the sub there.

[opnly bafld]

..............walk around the room until you find a spot where the bass response sounds the most even and natural. Put the sub there.

Actually you have to crawl around, your ears need to be where the sub will be placed.

[JLM]

Sorry for the late arrival...

Subwoofer 102 goes like this:

You need multiple subs (2 minimum, 4 is recommended) placed around the room to cancel out standing waves (below roughly 140 Hz) that otherwise are present in every room.  Standing waves (depending on the room, where you listen, and frequency) will add or subtract 20 dB of output.

Check out Floyd E. Toole (worked at the Canadian National Research Council, involved in much of the research), Schroeder frequency (the 140 Hz mentioned above), and swarm (here at AC, a vendor term).