Ok, I used to have a factory CD player so when I bought my Alpine amplifier I also purchased a bass knob that had 1 wire running back to the amplifier and 2 wires going to the RCA's of the HU I guess (3 total wires). It is broke so I am sending it back to have it fixed. Anyway, I have a new CD player and am getting a kicker 450.2 amp. The new amp comes with a bass knob that only has 1 wire that looks like a telephone wire that runs back to the amp. I am thinking of just using it and selling the old bass knob. What is the difference and does it matter which I use?