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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: Subwoofers in phase or out? a quick question posted by mattcecil1@yahoo.com on March 28, 2007 at 11:02:30:
The phase switch is there to help you minimise any cancellation at frequencies covered by both the sub and the main speakers. The correct position is whichever is the louder.Sub settings are tricky, however, and crossover frequency and gain settings also affect the result. In the manual for my REL, it states that people tend to set crossover frequencies too high and the gain setting too low. I definitely did both of those in my early days with the REL in my audio system.
It's hard to give advice as to what should be the correct frequency because it depends on whether you're running the main speakers full range with the sub blending in under them, or using an active crossover setup of some kind to split frequencies between the sub and the mains. The gain setting depends on the decision between those 2 options also, if they are options for you. In some systems/with some subs you don't have a choice and it will have to be one or the other.
I think there's something wrong when you have the subs 180 degrees out of phase. Singers are usually centred in the soundstage, not always but it is definitely the usual presentation for singers. If you're losing that on all recordings then soemthing isn't right. That would indicate that since you lose that but like other things more when the subs are out of phase, then either phase setting is going to be a compromise and the best result may be somewhere between them. Some subs do provide a complete 360 degree phase adjustment and that is definitely better than a simple in/out of phase switch which is all that my sub has. When what you have is a choice between 2 options, with each having different strengths and weaknesses, you pick the one which suits you best overall. There's really no other choice.
You may find that you can get better results with one sub in phase and the other out of phase. Room asymmetries and other things can certainly affect that. Try putting one sub back in phase and see what that does, then swap it out of phase and put the other out of phase. You really have 4 options here: both subs in phase, both out, A in phase and B out, and A out of phase and B in. Go for whatever sounds best overall.
But do try lowering the crossover setting and playing with the gain also.
David Aiken
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Follow Ups
- Re: Subwoofers in phase or out? a quick question - David Aiken 14:08:34 03/28/07 (0)
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