Intro to the PAC LC2:

Since I'm using a late-model CD player, I got the PAC LC2. The LC2 converts Speaker level inputs, into the RCA outputs. Here you can see the speaker inputs and RCA outputs:

And the feature we will be taking advantage of, a gain knob:


So, in addition to converting the speaker signal into a low level RCA signal, you can control the gain using the knob, effectively controlling the gain of the subwoofer. What we will be doing is moving that gain function from the PAC unit, into the performance sound overhead.

So to begin, I disassembled the LC2:


This is the gain knob, a 50 kohm stereo linear potentiometer.


So now that I know the rating of the potentiometer, I want to try and find a slide potentiometer with the same rating, that will fit in the overhead console.

Here's where I run into a couple issues:

Stereo slider pots appear to be somewhat uncommon, most are only Single pots

Stereo slider pots can be custom ordered to exact specs, but must be purchased in large quantities

Slider pots rated for 50kohms tend to be much larger than the space I have to work with

What I decided to do was find two slider pots, that were as close as possible to the correct size. So here is what I got:
Slide Potentiometers from Mouser Electronics

Two 50kohm Audio Taper (logarithmic) Slide potentiometers, with 30mm of travel. 30mm is still too long, so I won't be able to reach the full volume, but shouldn't be a problem since I can compensate with the gain on the amp.