I have a db drive e7be digital bass enhancer need to know about the wire to the bass knob

what about the remote power wire from the radio? 2 channel or four channel(amps)? are the speakers running parallel or in series? are you using a mono block? or an EQ?

The vibration from the bass is cutting off the amp. it is a loose wire causing this issue. you can also get a stabilizer that will stop the vibrations from causing this issue.

Bass boost simply adds DB or gain to the bass signal. Some like it, some dont.
The frequency knob is the Low Pass Filter (LPF) that cuts off the amp output above
the set frequency. A bass system usually cuts off below 400 HZ and more often 200HZ.
A good, rattle your car bass note is in the 25-80HZ range or lower but most amps and audio
input devices cant attain a good low note with clarity.
"Low-pass filter allows only frequencies below the crossover point to be amplified. A high-pass filter allows only frequencies above the crossover point to be amplified - useful for keeping low bass away from small speakers, so they can play more efficiently."
Checkout Crutchfields Glossary of Car Amps.
http://www.crutchfield.com/S-LPyoWWgD5qN/learn/learningcenter/car/amplifiers_glossary.html

Use a Bass reflex sistem, for that you may make a 3 inch hole in the box within an open pipe of 2 thirds of the box deep

It is NOT clear what you are trying to do... HOWEVER if you are attempting to extend a bass potentiometer remotely, you CANNOT use the four wire flat telephone line as it is unshielded and you will pick up hum.

The MRD-M300 has speaker-level inputs so you can easily use it with any car stereo. Hook it up and hear what good bass can sound like!
Details:

• 150 watts RMS x 1 at 4 ohms
• 300 watts RMS x 1 at 2 ohms
• MOSFET power supply and output stage
• STAR Topology for cleaner sound
• Bass Engine® features:
  • low-pass digital crossover, 30-200 Hz, 24 dB/octave
  • variable subsonic filter (15-50 Hz in 5 Hz steps)
  • parametric EQ variable from 30-160 Hz
  • Bass Compensator enhances low-end definition
• top-mounted digital control center with cover
• time correction 0-10 milliseconds in 0.5ms steps
• phase correction 0-180° selectable
• digital readout
• detachable front cover
• blue power LED
• delayed turn-on
• requires 8-gauge power and ground leads — wiring and hardware not included with amplifier
• speaker- and preamp-level inputs
• gold-plated terminals
• 8-5/16"W x 2-11/16"H x 11-1/2"D (10"D without front cover)
• 1-year warranty

i need an bass knob for an planet audio rxd2400

check this diagram found here

on rockford amps, the bass control knob needs to be connected to get the maximum output (+18 db gain i believe). If you did this to the power wires, then yes, you may have at least damaged the bass control knob. Try replacing this to see if you get all of your gain back. If not, then you have damaged something inside the amp...maybe a capacitor or power supply inside. If that's the case, you'll need to get the amp looked at by an electronics repair technician or local stereo shop.

I'm wanting to know the same thing... But be careful on the pin out of the control you get.

I have an audiobahn 2300HCQ amp... Before I had the 1800. The 1800 came with a remote with 6pin remote cord. I got the 2300 used and did not get a control for it. The plug on the 2300 is a 4 pin plug... I can't figure out how to cross it over correctly to get the 1800 remote to work on the 2300.

I have tools to crimp an end... Just can't figure out the color pin out.