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Hello!I am thinking about getting a single 10" sub with a built
in amplifier to perform with my smaller monitors. I have
my monitors about 5 foot out from the front wall of a typical
sized (17.5 X 13.5) rectangular living room. My listening
position is also about 5 feet out from the back wall. I need
to have the sub positioned fairly near and along the front wall,
and am concerned with not only placement, but things like phase
switching adjustment, etc, due to the distance the sub will be
behind the monitors. Would a sub with 0 and 180 degree phase
adjustment be adequate, or do I need a sub with continuous
phase adjustment? I will be crossing over at about 100 Hz.Thanks!!!
Follow Ups:
At 100 Hz, 1 wavelength is about 11 feet, so the monitors are about 1/2 wavelength from the wall (you said they were 5 feet out) so on that basis a 180 phase shift should be about right. But there may be substantial phase shift in the woofer of your monitors,particularly if its ported, so the problem becomes more complex. I use a Paradigm X-30 electronic crossover to bring in my sub at 80 Hz, and to roll off the low end on my satellites. I find that plugging the ports on the satellites eases the crossover problem. (a plug of foam or polyester)Getting a sub to work really well is always a hassle, but well worth the effort if you can get it right.
It's hard to say what you would need, these things are too unpredictable. I have a Genesis sub with variable phase, but I find it much easier to place the sub in-line with the my monitors (woofer voice coil to bass/mid voice coil) and leave the phase setting @ 0. Is it possible for you to place the sub against a SIDE wall, in-line w/your monitors, or even a little in front (describe an arc, all speakers equi-distant from your listening position)? That is VERY effective, as long as you don't crossover the sub too high. You don't say whether you're high-passing your monitors or not, that could also be a factor.Hsu like to place their subs right next to the listening chair.
If front wall placement is your only option I would opt for the variable phase, other factors being equal, but they're not as common. Good luck!
It's hard to say what you would need, these things are too unpredictable. I have a Genesis sub with variable phase, but I find it much easier to place the sub in-line with the my monitors (woofer voice coil to bass/mid voice coil) and leave the phase setting @ 0. Is it possible for you to place the sub against a SIDE wall, in-line w/your monitors, or even a little in front (describe an arc, all speakers equi-distant from your listening position)? That is VERY effective, as long as you don't crossover the sub too high. You don't say whether you're high-passing your monitors or not, that could also be a factor.Hsu like to place their subs right next to the listening chair.
If front wall placement is your only option I would opt for the variable phase, other factors being equal, but they're not as common. Good luck!
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