Do you have a question about the Pioneer GM-X904 and is the answer not in the manual?
Configuration of LPF/HPF switches for Speaker Out A and Speaker Out B for audio range selection.
Explanation and graphical representation of adjusting the LPF cut off frequency for Speaker Output A.
Explanation and graphical representation of adjusting the HPF cut off frequency for Speaker Outputs A and B.
How to adjust input level controls A and B to match car stereo output for optimal volume and clarity.
Instructions for connecting the special red battery and ground wires to the amplifier and vehicle.
Details on power source, current consumption, fuses, dimensions, weight, and output power.
Technical data including load impedance, frequency response, SNR, distortion, and separation.
Specifications for low pass filter, high pass filter, and input level/impedance.