XLR or 1/4"?

Discussion in 'Hardware, Setup & Repair [BG]' started by BigBohn, Oct 12, 2001.

  1. BigBohn

    BigBohn Guest

    Sep 29, 2001
    WPB, Florida
    whats the difference? im not recording, just live clean hi-fi playing. PLEASE SOMEONE STRAIGTEN ME OUT HERE!!! *i meant that in no perverse sense*
  2. merlin

    merlin Guest

    I am not sure where i should move this. I mean really it has nothing to do with bass, yet it isn't suitable for Off Topic i don't think.

    Seeing as i have moved one of your threads today, i won't be cruel and take my late night out on you, so i'll answer your post instead:

    XLR sockets (this one a male) looks like this:


    It has a earth shield, Pin 2 is usually 'hot' and pin one 'anitphase'.

    A 6.5mm jack (or 1/4" for u yanks. ;) ) looks like this:


    That is a stereo socket.

    As for 6.5mm plugs they look like this:


    Is that enough difference for ya?

    I think its fairly self explanatory..

  3. Munjibunga

    Munjibunga Retired Member

    May 6, 2000
    San Diego (when not at Groom Lake)
    Independent Contractor to Bass San Diego
  4. BigBohn

    BigBohn Guest

    Sep 29, 2001
    WPB, Florida
    hehe merlin, thanks, and you too munji

    edited to TO too, lol:D
  5. OK..
    dr.AllodoX's quick lessons in TSR / XLR jacks..

    the XLR-plug consists out of 3 conduits.

    1 - ground
    2 - hot
    3 - neutral

    The " neutral " is a signal that is the exact opposite of the " hot ".

    The key to Balanced lines is that you substract both signals from eachother.

    Humming / static / etc is picked up by both signals, and thus will be identical on both signals..

    lets say for instance the static has a value of -1..
    if you substract both signals from eachother it would be : ( -1 ) - ( -1 )

    Since out math-teachers told us that substracting a negative number will result in a positive number, it will actually be : ( -1 ) + 1 = 0

    If the static is 1 , it would be even simpler.. 1 - 1 = 0 ... So, as you can see... the static cancels eachother out.

    But the signals are actually the exact opposite of eachother.. so lets say for example the signal is 4 volts.. this would mean that the " hot " is +4, and at the same time the " neutral " would then be -4..
    if you substract these.. it would be : ( +4 ) - ( -4 )

    which leads to (+4) + ( 4 ) = 8

    so you see.. the static cancels eachother out, while the signals boost eachother, giving you clear sound without any form of interferance..

    the TSR jack ( TSR = Tip Sleeve Ring ) is actually the same as the XLR jack, but in a more compact form.. you still have 3 conduits..

    voilla !

    if you have any more questions.. just ask :D

    p.s. Damn, i'm good !! :D
  6. BigBohn

    BigBohn Guest

    Sep 29, 2001
    WPB, Florida
    :eek: whoa, thank you, teacher, hehe:D
  7. merlin

    merlin Guest

    Ok i aint gonna start a war. lol I think you may be right for your part of the world. I know Pin 2 being hot is a international standard, but all the plugs we use have Pin 3 as ground. I had to wire up a few for rehearsal, i made Pin 3 ground (copied a pre-existing one), they work fine too.

    Damn Australians!!


  8. if you connect all wires 1-on-1 there's no problem..
  9. LakLnd5

    LakLnd5 Guest

    Oct 5, 2001
    Chicago, Il, USA
    Not to bud in, but I think you need to take a good look at your gear to determine which pin is the hot lead. I have a Demeter pre that's pin2/hot that runs to a Crown power amp that's pin3/hot. I had to make a cross-over cable. If I didn't check, my whole rig would've been out of phase!!

    my 2 cents ;)
  10. A way to remember the XLR pinouts -

    X = pin 1 = eXternal, or shield
    L = pin 2 = live
    R = pin 3 = return

    XLR balanced is pretty much always used in low impedance circuits, like 600 ohms, and 1/4 inch is pretty much unbalanced and hi impedance, like 10,000 ohms and greater.