Key Features
Amplifier Type Mono Channel
Bridgable Not Bridgable
RMS Power at 4 Ohms 300 W x 1
RMS Power at 2 Ohms 500 W x 1
Performance
Frequency Response 20 Hz - 20000 Hz
Signal to Noise Ratio 100 dB
THD at Rated RMS Power 0.05 %
Crossover / Equalizer
Bass Boost With Bass Boost
Bass Boost Frequency 45 Hz
Low - Pass Frequency 50 Hz - 250 Hz
Other Features
Input Voltage 14.4 volt
MOSFET Circuitry Yes
Dimensions
Width 13.07 in.
Depth 9.85 in.
Height 2.38 in.
Miscellaneous
Product ID 20606848
More Information
The Rockford Fosgate Power 501BD has 1 Equalizer Bands. Signal to Noise Ratio: 100 Decibels. Rockford Fosgate. Its a full sentence. It means POWER! It means ATTITUDE! Since 1973, when founder Jim Fosgate put his name on the first real piece of high performance audio equipment built for the car, nothing has been the same.

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Key Features
Amplifier Type Multi Channels
Bridgable Bridgable
RMS Power at 4 Ohms 62.5 W x 4
RMS Power at 2 Ohms 125 W x 4
Performance
Frequency Response 20 Hz - 20000 Hz
Signal to Noise Ratio 100 dB
THD at Rated RMS Power 0.05 %
Crossover / Equalizer
Bass Boost With Bass Boost
Bass Boost Frequency 45 Hz
Low - Pass Frequency 80 Hz - 80 Hz
High - Pass Frequency 120 Hz - 120 Hz
Other Features
Input Voltage 10.5 volt
MOSFET Circuitry Yes
Dimensions
Width 9.8 in.
Depth 13.35 in.
Height 2.4 in.
Miscellaneous
Product ID 20295755
More Information
What has kept Rockford Fosgate Punch amplifiers on top of the high-end car audio industry? Simply put, they have continually improved their amplifiers, drawing on the feedback they receive from hardcore car audio competitors. Rockford's Transana (TRANSconductance Active Nodal Amplifier) MOSFET circuitry simplifies the current and voltage gain while TOPAZ (Tracking Operation PreAmplifier Zone) circuitry eliminates 80% of unwanted noise created by ground loops. Punch amplifiers feature discreet surface mount technology (DSM) utilizing high-speed robotics to produce circuit boards that are more efficient, put out more power, and are less prone to unwanted noise. To keep the amp protected, Rockford's NOMAD (Non-Multiplying Advanced Decision) protection circuitry uses an analog computer that serves to protect, but not limit the amp.