The Following info in for the Amp I have.
Fahrenheit 400x2 Power Amplifier
Power Acoustik Fahrenheit Series
· 2ch · High level input · Cross over selectable · Var/Sub 40Hz - 300Hz · Var/High 40Hz - 300kHz · Var. 40Hz 18 dB bass boost · Stable to (stereo): 2 Ohms · Mono: 4 Ohms · 4 Ohm...