phasing
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Joined: Jan 2011
Posts: 1,291
connoisseur
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OP
connoisseur
Joined: Jan 2011
Posts: 1,291 |
a few days ago i installed a new amp for my 2 front speakers.
when the installation was finished, i realized that the speakers were not in phase, so i inverted the connecting wires at one of the speakers' connector.
all was fine until the time came for Audyssey calibration. Audyssey said my front speakers were out of phase. i ignored the advice and went on with the calibration, knowing they were in phase.
what i would like to know is the reason this is happening; that Audyssey says one thing and my ears tell otherwise. could it be that phase is inverted in the amplifier? the amp is bridgeable, and i think that when an amp is bridged, one of the channels' phase is inverted; but the amp, as used, is not bridged. it's used in stereo mode, and the only filter used is a 33Hz hi-pass.
anyone can enlighten me about this? i find it quite puzzling.
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Re: phasing
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Joined: Jul 2008
Posts: 912 Likes: 4
aficionado
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aficionado
Joined: Jul 2008
Posts: 912 Likes: 4 |
a few days ago i installed a new amp for my 2 front speakers.
when the installation was finished, i realized that the speakers were not in phase, so i inverted the connecting wires at one of the speakers' connector.
all was fine until the time came for Audyssey calibration. Audyssey said my front speakers were out of phase. i ignored the advice and went on with the calibration, knowing they were in phase.
what i would like to know is the reason this is happening; that Audyssey says one thing and my ears tell otherwise. could it be that phase is inverted in the amplifier? the amp is bridgeable, and i think that when an amp is bridged, one of the channels' phase is inverted; but the amp, as used, is not bridged. it's used in stereo mode, and the only filter used is a 33Hz hi-pass.
anyone can enlighten me about this? i find it quite puzzling. That is why I am not a particular fan of calibration. A few months ago I bought a brand new Yamaha CX-A5000 Pre-pro, great unit, however, when I did the calibration, it read that all but 1 pair of speakers(9.2)were out of phase which is ridiculous. It had me rechecking everything in my set-up including the cabling between the Pre-pro and amps, but, in the end, being pretty meticulous when I connected the new unit, and I hadn't changed any connections between the amps and speakers anyway, I knew there was nothing wrong. My usual checking method(if you want to be 100% sure) is run a test tone just in the L/R speakers and when sitting in the sweet spot between the two and the tone is in the middle then you know everything is OK.
Last edited by casey01; 03/09/14 07:42 PM.
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Re: phasing
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Joined: Sep 2011
Posts: 1,767
connoisseur
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connoisseur
Joined: Sep 2011
Posts: 1,767 |
Audyssey found that my 'Rears' were out of phase with the other speakers & indeed they were hooked up wrong on Axiom's powered wall mounts.
My fault, but Audyssey was correct in that case...
TAM
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Re: phasing
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Joined: Jan 2011
Posts: 1,291
connoisseur
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OP
connoisseur
Joined: Jan 2011
Posts: 1,291 |
i checked my wiring again, and found out that everything was ok before i did the calibration.
i'm getting quite old, and after about 8 hours work on the new setup, i was very tired and out of breath and a mistake slipped by which i did not see when i checked all the connections again just to be sure all was right. i had also checked on a TV station where the sound was mono...
so now everything is fine and working properly; i just had to reverse a connection on one of the speakers.
so, we just forget about this and go listen to some good music...
thanks to you both for the comments and help. :-)
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Re: phasing
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Joined: Sep 2011
Posts: 1,767
connoisseur
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connoisseur
Joined: Sep 2011
Posts: 1,767 |
Getting old & developing dim vision - I hear ya!!
TAM
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Re: phasing
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Joined: Jul 2009
Posts: 2,281
connoisseur
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connoisseur
Joined: Jul 2009
Posts: 2,281 |
I hear ya, I am still looking for the truck that ran over me last time I was working behind my system.
DOG is GOD spelled backwards. What others think of me is none of my business. M80 V3 MY GLOSS Cherry
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Re: phasing
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Joined: Jan 2004
Posts: 13,840 Likes: 13
shareholder in the making
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shareholder in the making
Joined: Jan 2004
Posts: 13,840 Likes: 13 |
Trust Audyssey
M80s VP180 4xM22ow 4xM3ic EP600 2xEP350 AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85
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Re: phasing
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Joined: May 2002
Posts: 10,654
shareholder in the making
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shareholder in the making
Joined: May 2002
Posts: 10,654 |
Okay Jacques, but just to answer something you asked about, yes some amplifiers do invert polarity, but this would affect all its channels equally, so the connected speakers wouldn't exhibit a wrong polarity issue.
Of course some "audiophiles" imagine that absolute polarity is also necessary, but testing doesn't support such a theory. It isn't unusual for polarity to be reversed several times in the electronics of recording studios.
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Enjoy the music, not the equipment.
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