Rockville Phenom RXA-F1, Owner'S Manual

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Once again, when bridging two amplifiers together, the final impedance load of the bridged amplifiers should be no
lower than 2-ohms. Double power will occur at 2-ohms.
Master amplifiers positive (+) speaker terminal should be wired to the positive terminal of the subwoofer.
Slave amplifiers positive (+) speaker terminal should be wired to negative terminal of the subwoofer.
Now connect a heavy gauge wire (12 Gauge) between the negative (-) terminal of the Master amplifier and the
Negative (-) terminal of the Slave amplifier.
Please see diagram on previous page for a detailed drawing.
When daisy chaining two amplifiers for independent woofers, wire up the the woofers as you would typically wire them
when installing individual systems, even down to 1-ohm. By using the Master/Slave input configuration you gain the
advantage of having one amplifiers’ preamp section control both amplifiers, eliminating the need to gain match and
crossover match your system between amplifiers.
Twin Amplifier Bridging