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How much does speaker polarity matter?

Discussion in 'Electronic Repair' started by [email protected], Jan 2, 2008.

  1. Meat Plow

    Meat Plow Guest

    I remember one drummer we had in the 90's that miked both mounted toms (1
    mic), his floor tom, bass, snare/hi-hats, and had an overhead for his ride
    and crash cymbals. He brought his own 8 plug snake :)
    I had the same setup in my basement when I had a kit down there.
     
  2. Meat Plow

    Meat Plow Guest

    I've had similar experience but in a modern digital studio. One trick I've
    used is to soft gate the bass guitar track attack on the bass drum to
    tighten up the rhythm. Being both a drummer and bass player I understand
    just how closely knit the two need to be. I love to here a band where
    those two really click.
     
  3. Ron(UK)

    Ron(UK) Guest

    I've just got one of those Klark Technik SQ1 Dynamic 8 channel
    gate/compressors, I haven't had much time to play with it, but that`s
    one of the clever tricks that it`s ideal for.

    Ron(UK)
     
  4. Ron(UK)

    Ron(UK) Guest

    If it`s rock n roll that`s the norm, but it`s not always necessary. Of
    course rock drummers like to see lots of mikes, doesn`t necessarily
    meant that they are all actually live.

    Ron(UK)
     
  5. GregS

    GregS Guest

    My brother found two compressors he junked picked, asked if I could look at them.
    He said I could do what I wanted. After finding out they were vintage in high
    demand, I tuned them up and go tabout $1200 for them on Ebay. Just mono compressors
    that seemed to be liked for doing drums. That was fun. I split with my brother.

    greg
     
  6. Ron(UK)

    Ron(UK) Guest

    Dontcha just love it when that happens

    Ron
     
  7. N Cook

    N Cook Guest

    I misinterpreted the wiring colours for replacing the jack plug on a set of
    stereo headphones one time.
    Try as an experiment, doing the same, reversing the polarity of one relative
    to the other, and then try locating a soloist in the sound "image".
     
  8. Arfa Daily

    Arfa Daily Guest

    I just watched a programme on TV about the Floyd, and Nick Mason made just
    that point about him and Waters.

    Arfa
     
  9. Arfa Daily

    Arfa Daily Guest

    Ah yes, agreed. But that is when one channel is reversed with respect to the
    other, as has been raised repeatedly in this thread. Absolute polarity, of
    two correctly phased channels, has no such effect, one way, or the other.

    Arfa
     
  10. Meat Plow

    Meat Plow Guest

    We use the same basic setup for recording with the addition or two high
    end AKG mike up at the ceiling of the studio. We mix a little of those in
    for a natural spatial enhancement to the overall stereo image. The ceiling
    in the studio is a cathedral style ceiling that's maybe 15 feet high. The
    control booth and vocal isolation booth are separate.
     
  11. Meat Plow

    Meat Plow Guest

    Right now we are using 4 Symetrix 525's. I really like those things and
    even have one myself. I used it in conjunction with my bass rig which was
    a separate Crown Microtech 1000, Gallien Kruger guitar preamp and the 525.
    Now, the rig is the same amp but with a BBE bass preamp that has built in
    comp/limit, BBE effect enhancement and an active crossover. I play into a
    4x10 and when needed a 1x18 matched set of Fender cabinets.

    By the way this "we" I refer to is myself, my sister and brother in law
    who own a music store and recording studio. I own the building which is a
    store front that has 3 other businesses in it and my sister and her
    husband rent from me. (that is when they can afford to pay the rent)
    Pretty tough business this mom and pop music store is. I still do some
    repairs for them. Mostly guitar amps but I'm picky as to what I'll work on
    and that which I refuse they send out. They have a decent business but
    it's really hard to make money with all the chain stores around like
    Guitar Center and Sam Ash to mention a few. However it's good for me
    because I get calls from them when someone walks in off the street with
    a piece or equipment for sale. My basement is full of sound reinforcement
    gear, guitar amps, etc... :)
     
  12. z

    z Guest

    In theory yes, but in practice, you'd need one hell of a system for
    that to make a difference; and it's not 100% clear that it's audibly
    different. Or that it's not.
     
  13. z

    z Guest

    One thing is the lack of phase coherence between different drivers.
    Sure, the drum head moves as one unit, pushing a wavefront with a lot
    of frequencies, all lined up with their crests added. But by the time
    that gets parceled out through the crossover, the phases and delays
    between the drivers are all out of whack. One reason why fancier
    speakers are so often stepped, with the tweeters set way back from the
    fronts of the woofers, etc. So, if you've lost that punch of having
    all the crests of the waveforms of different frequencies aligned in
    one big tidal wave of air pressure and it's all smeared out in space/
    time, you don't lose much by just flipping the polarity on the whole
    thing.
     
  14. Eeyore

    Eeyore Guest

    I wouldn't bet on that AT ALL ! I dount it's praticularly pistonic in action.

    Graham
     
  15. Ron(UK)

    Ron(UK) Guest

    There used to be a slo mo video on the net of a bass drum being hit, you
    could see the ripples in the head as the impulse spread outwards from
    the impact point to the rim.

    I wonder what the time delay is between the batter head moving and the
    front head following (or trying to follow)

    Ron(UK
     
  16. Meat Plow

    Meat Plow Guest

    What's that supposed to mean?
     
  17. Meat Plow

    Meat Plow Guest

    I do have one hell of a system :)
     
  18. Eeyore

    Eeyore Guest

    Function like a piston meaning that the surface doesn't flex/distort. Cone
    loudspeakers are considered to have pistonic action at low frequencies for example.
    At higher frequencies they suffer cone break-up and are no longer pistonic.

    Graham
     
  19. clifto

    clifto Guest

    I have, going back more years than I care to relate in a public place. :)
     
  20. N Cook

    N Cook Guest

    I did notice the other month, in a large London terminus railway station,
    that the pa system over hundreds? of speakers is much clearer than it used
    to be.
    I wonder what they've done - multiple staggered delays? so there is one
    coherent movement of sound along the major axis of the station?
     
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