This just comes down to crossover setting. At the extreme, if you set your crossover at some high level like 120hz, then you will definitely localize the sub. The sub is performing just like the woofers in full-range speakers. Placing the sub behind the listening position or anywhere other than between the mains will tend to alter the stereo image.
Setting the crossover at some point below 80hz makes the sub perform as a sub. Only the lowest of low frequencies go to it. Most folks can't localize even an 80hz signal. This makes sub placement (from an imaging perspective) irrelevant. One thing to keep in mind: Placing a sub is a tricky proposition. Low frequencies cause interesting room resonances. If you did a frequency sweep, you'd notice some amazing peaks and dips from the sub. Move the sub just a few inches and the sweep changes. The sound can be boomy or tight with the same sub just by changing its location. You also have to work with the phase setting on the sub. There are a lot of variables. Finally, the reason for two subs is to mitigate the placement issues. Many of the peaks and dips can be tamed if you have two subs. Of course, for many, the SOAF (significant other acceptance factor - gotta be policially correct here....) will preclude the multi-sub option regardless of sound quality. David -- dnighorn ------------------------------------------------------------------------ dnighorn's Profile: http://forums.slimdevices.com/member.php?userid=872 View this thread: http://forums.slimdevices.com/showthread.php?t=20197 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
