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Zoom B3 and 1/4 phono vs XLR

Discussion in 'Effects [BG]' started by mrz2u, Mar 3, 2014.

  1. mrz2u


    May 10, 2012
    I have only ever used XLR where it had to be used. That I can recall I have never had it as an option on both ends till now.

    The Zoom B3 has an XLR out and my MarkBass has an XLR in. I need a new cable anyway so why would or wouldnt I want to make the connection from the B3 to the AMP with an XLR cable?
  2. Jazz Ad

    Jazz Ad Mi la ré sol Supporting Member

    It is better to use XLR when available.
  3. Stay with the 1/4" connection, the xlr connection is line level and will likely overdrive the input on the Markbass. The xlr on the Zooms is intended to drive the input on power amps or line inputs on mixers.
  4. mrz2u


    May 10, 2012
    Uhhh, the MarkBass, it IS an amp. The 1/4 in jack is line level as well.
  5. Power amplifier not instrument amp, pretty sure that the inputs on the Markbass are not up to a 1 volt input signal.
  6. mrz2u


    May 10, 2012
    How do you imagine a power amp is different?

    And on voltage, from where are you getting your numbers? On page 51 of the Zoom manual it says only this about the XLR output…

    Balanced output XLR connector
    Output impedance
    100 Ω (HOT-GND, COLD-GND), 200 Ω (HOT-COLD)
    PRE/POST (switch selectable)
    GND LIFT (switch selectable)

    Nothing there about output voltages…probably because they are well within normal ranges would be my guess.

    On the MarkBass amp it says this about the XLR input…
    INPUT impedance: 500 Kohm, max. voltage: 15 Vpp
    BALANCED impedance: 100 Kohm, max. voltage: 25 Vpp

    So the XLR input actually takes more voltage than the phono jack.
  7. Many users have found the xlr on the Zoom units to be too hot for most inputs on mixers and instrument amplifiers causing excess noise or unpleasant distortion, ymmv
  8. I thought that you could adjust the level of the XLR output on the zoom...
    OK... time to break out the manual...

    On the GLOBAL menu, you can change the master level... if the XLR is in "post" position, this should also change the level on the XLR.
  9. Jazz Ad

    Jazz Ad Mi la ré sol Supporting Member

    Indeed. Just because it can be super hot when needed doesn't mean you have to run it like this all the time.