First of all, connect the RCAcables coming from the radio1 head unit to the respective inputs of your PQ-7. Always run signal cables in a distance to power cables and the vehicles's factory wires to avoid induction of noise.
TECHNICAL DATA Parametric 6-cgabekl7-band equalizer All bands: + 10 dB adj. Range. Q=0.5 20 Front channels EQ frequencies: Center freq, I . band 100 Hz (35 350 Hz) Center freq. 2. band 300 Hz (1 00 11 00 Hz) Center freq. 3. band 1000 Hz (350 3000 Hz) Center freq.