Rockford Fosgate POWER 650 MOSFET Owner's Manual page 23

Noise:
Less than -8OdB
Crossover:
12dB/Octave, switch controlled.
Crossover Frequencies:
Low Channel
Fiat
70 Hz
100 Hz
140 Hz
200 Hz
280 Hz
Preamp Sensitivity:
50Mv to 2.5V adjustable.
Preamp Frequency
20-Hz-20KHz ± .dB.
Input Gain:
250 MV to 2.5V
both power amp and preamp.
High Channel
Flat
140 Hz
200 Hz
280 Hz
400 Hz
560 Hz
Response:
adjustable.
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