phase question...

Discussion in 'Archived Threads 2001-2004' started by Jason Wilcox, Aug 29, 2002.

  1. Jason Wilcox

    Jason Wilcox Supporting Actor

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    ok so i've got a little 2.1 system hooked up to my computer. but, the sub is out of phase with the bookshelf speakers. unfortunately the sub also lacks a phase switch and i don't feel like opening my sub up to switch the wires. so, i just switched the phase on both my bookshelf speakers. problem solved. but, i keep hearing about "absolute phase"...

    does anyone hear a difference when they switch the polarity of both their main speakers? should i? (i don't)
     
  2. Wayne A. Pflughaupt

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    Jason,

    “Phase” and “polarity” are not the same thing. “Phase” is time-alignment, “polarity” is electrical (which would include speaker-level connections).

    “Absolute phase” means all the voice coils in a speaker with multiple drivers are physically (and thus time) aligned. Absolute phase is difficult to achieve in a sat-sub system unless there is a phase control on the sub, or a digital delay in-line somewhere. Lacking that, the only way to achieve absolute phase is to make sure the sats and sub are equidistant from the listener.

     
  3. Jason Wilcox

    Jason Wilcox Supporting Actor

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    ok thanks......i knew the speakers were out of phase with the sub because when i switched the sub on...frequencies around the crossover point went down about 8db.

    so just to clarify...it's OK if i switched the polarity (+ on receiver to negative on the speaker) of both mains to match the phase of the sub right?
     
  4. Jason Wilcox

    Jason Wilcox Supporting Actor

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    right?
     
  5. Jason Wilcox

    Jason Wilcox Supporting Actor

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    i've got the + on the receiver going to negative on the speakers and - on the receiver going to + on the speakers in order to match the phase of the sub. is this ok?
     
  6. Saurav

    Saurav Cinematographer

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  7. Jason Wilcox

    Jason Wilcox Supporting Actor

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    ah ok......i mean it's obvious that something isn't right when i switch the polarity in one speaker....but when i switch both it sounds normal
     
  8. Saurav

    Saurav Cinematographer

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  9. Jason Wilcox

    Jason Wilcox Supporting Actor

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    thank you! that was the explanation i was lookin for
     
  10. Saurav

    Saurav Cinematographer

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    You're welcome. Glad to be of help.
     

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