I am trying to make pigtails for an Altec 9014A notch filter passive EQ. It has a single barrier strip and I need some help to know where to hook up the XLR pigtails for in & out. The barrier strip reads : ground, L2, L1 (connected by a resistor),and L2, L1 (with no resistor).

Also, can the 1588C preamplifier be used in an Altec 342B tube amplifier? The 342B has 4722 grn preamps but I'm not sure if they give phantom power and was wanting to try a condenser mic through it. Thank you,