Why don't the VU Meters Move?

Discussion in 'Archived Threads 2001-2004' started by Brett DiMichele, Feb 12, 2003.

  1. Brett DiMichele

    Brett DiMichele Producer

    Sep 30, 2001
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    Hey Folks,

    A while back I posted that I purchased a Behringer
    Tube Ultra-Q and I was fairly certain the unit was
    defective. I checked my wiring with Behringer and
    with some of the knowledgeable forum people and I
    confirmed my wiring was okay. I sent the unit back
    and after waiting for more than a month ( I will
    never do buisness with Musicians Friend again.) I
    have the new unit at home and set up.

    This unit unlike the last one, works flawlessy! But
    I have a question..

    There are 2 VU Meters one for each channel and they show
    the amount of "warmth" the Sovtek Triode tubes are adding
    to the signal. These VU meters barely move unless I crank
    the volume up to the earbleeding point (in other words, so
    loud I can't bear it!).

    It says in the manual something about a 6Db correction the
    unit applies to the input signal when using unbalanced XLR
    Connections. I am assuming it's -6Db at the input. Could
    that reduction and possibly too little pre amp output
    voltage be the culprit?

    What can I do to remedy the problem? I am guessing that I
    just have to live with it... The unit is obviously working
    as the parametric EQ works fine and I know the tubes are
    imparting thier harmonics onto the signal because when I
    defeat the unit (turn it off and it hard bypasses) I can
    most certainly hear the difference (and it sounds much
    better on!) [​IMG]

    Any suggestions or information would be greatly appreicated!

    Thanks a million!
  2. Joel X

    Joel X Stunt Coordinator

    Nov 21, 2002
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    It is possible you are not sending it enough signal to get it to do its processing. I had a similar problem with my Ultra Bass Pro that I use for my Bass Shakers. What I did to fix it was run the signal through a small mixer that I purchased for mic phantom power. After I was able to boost the input signal the problem went away.
  3. Brett DiMichele

    Brett DiMichele Producer

    Sep 30, 2001
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    I don't think it's a case of not enough signal for it to
    process because the Parametric EQ Section *is* functioning
    correctly. And when I defeat the EQ section and just use
    the Tubes if I turn the tube section off also there is a
    very noticeable difference in sound.

    I think my problem is that I am using the PreOuts which
    are connected to the volume gain on the receiver and this
    varries the pre out signal. If I was to set the volume to
    full and use the input Boost/Cut on the Tube-Q then the
    meters move big time.. The problem is that I then have no
    way to control the volume other than using the Tube-Q's
    Input gain controls which I don't want to use...

    My Power amp has a gain control but it's on the back of
    the unit and it's not exactly easy to use that as a volume
    knob [​IMG]

    If the output voltage of the Pre Outs was a tad higher I
    think I would be okay with the VU meters, I would probably
    even have to back the gain down on the inputs of the Tube-Q
    but there is no way to boost the Preouts short of another
    Pre Amp inline between the Reciever and the Tube-Q and I
    am not putting another device in the chain...

    Ohh well, no big deal really...

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