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Thread: Anyone know how to hook up an Altec 9014A EQ?

  1. #1
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    Anyone know how to hook up an Altec 9014A EQ?

    It has a screw terminal strip on the back of the chassis labeled : ground, L2, L1, (L1 & L2 connected by a resistor), and L2, L1, (with no resistor) I want to make XLR connections to this EQ. I think it was made around 1968. Thanks.

  2. #2
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    - L1 & L2 are the usual "Altec-Speak" for ( + and - ) on a "balanced" ( 3-wire ) connection .
    - Obviously "Ground" goes to pin 1 on the XLR type connector .

    - In your case , I don't believe it'll make much difference which one you choose as your hot ( connected to pin 2 ) from your XLR connector . Just be consistent going into & coming out of this EQ with your choices .

    - The resistor across L1 & L2 is a load resistor. You may need it .

    - I see from your other post that this "Notch Filter" is a passive inline .


  3. #3
    Member Alan Fletcher's Avatar
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    L1= pin 1 (neg)
    L2= pin 2 (pos)
    GROUND= pin 3 (shield)

    If you want to use an unbalanced connection, just jumper pins 1 and 3 together:

    Pins 1+3 = neg.
    Pin2 = pos.

  4. #4
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    Thanks !

  5. #5
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    Yes this notch filter is passive, with 24 knobs; each knob controlling a different frequency 60HZ to 12.5 KHZ. Does it matter which set of L1 & L2's get the input or output? Is the pair of L1 & L2's connected by the resistor input or output? Any idea where to get a manual for this unit?

    PS: it looks right at home next to my 1592B and 342B...

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