Rockford Fosgate punch 120 User Manual (English)

Questions and Answers:

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Catherine ValenciaAug 11, 2025
How to troubleshoot a Rockford Fosgate punch 120 Car Amplifier that does not turn on?
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  Samantha YoungAug 11, 2025
  If your Rockford Fosgate Car Amplifier isn't turning on and the power LED is off, it could be due to several reasons. First, the voltage applied to the REM terminal might not be between 10.5 and 15.5 volts, or there might be no voltage present at all. Check the alternator, battery, fuse, and wiring, and repair them if needed. If the voltage exceeds 15.5 volts, have the electrical system inspected by a certified car service center. Alternatively, the voltage to the B+ terminal might be outside the 10.5 to 15.5-volt range, requiring the same checks and repairs. Lastly, the amplifier might not be properly grounded, so inspect the wiring and repair as necessary.
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Miranda LittleAug 17, 2025
What to do if my Rockford Fosgate Car Amplifier has no sound but the power LED is on?
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  Kaitlyn ThompsonAug 17, 2025
  If your Rockford Fosgate Car Amplifier has no sound but the power LED is on, the issue might stem from the speakers or their wiring. Start by disconnecting the existing speakers and testing the amplifier with known working speakers and wires. If the amplifier now plays sound, carefully inspect the wiring and installation of your original speakers, making necessary repairs. Another possibility is that the speakers themselves are defective. Disconnect the existing speakers and test with known working speakers to identify if the speakers need repair or replacement.
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Amanda SullivanAug 22, 2025
Why is the speaker output low or distorted on my Rockford Fosgate punch 120 Car Amplifier?
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  Trevor HillAug 23, 2025
  Low or distorted speaker output from your Rockford Fosgate Car Amplifier can arise from a few potential issues. First, the input gain signal for the amplifier may be incorrectly set, so try readjusting the input gains. Another cause could be a source unit output that's too low or nonexistent; test the system with a known working source and repair or replace the original source as needed. Finally, low battery voltage or significant voltage drops to the amplifier under load can also lead to this problem. Check the alternator, battery, fuse, and power and ground wiring, making any necessary repairs.
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xrobinsonAug 29, 2025
How do I fix engine noise when using high level inputs on my Rockford Fosgate Car Amplifier?
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  hardycindyAug 30, 2025
  To address engine noise when using high-level inputs on your Rockford Fosgate Car Amplifier, especially if it uses TOPAZ input circuitry, you may need to provide a reference ground to the TOPAZ input circuit. Connect the shield of the RCA input from the auxiliary amp to the chassis ground of the radio. Alternatively, you can connect the RCA shield to the amplifier's power ground terminal.

Rockford Fosgate punch 120 Specifications

General

Power Output	120 Watts
Channels	2
S/N Ratio	>90dB
Crossover Slope	12 dB/octave
Frequency Response	20Hz - 20kHz
RMS Power at 2 Ohms	60 Watts x 2
Bridged RMS Power	120 Watts x 1
THD at Rated Power	Less than 0.05%
Crossover Frequency	50 Hz to 250 Hz
Bass Boost	0-18dB at 45Hz
Low Pass Crossover	50-250Hz
Signal-to-Noise Ratio	90 dB