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Rockford > 
Item#: 9SIA15511G6432

Rockford Fosgate 400W 4 Channels Bridgeable Amplifier

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Rockford Fosgate




Amplifier Class
Class AB
Amplifier Channels
4 Channels


Max Power
RMS Power
50 W x 4 @ 4-Ohms

100 W x 4 @ 2-Ohms
Bridged Power
200 W x 2 @ 4-Ohms Bridged


Frequency Response
20Hz - 20KHz
Input Voltage
150mV - 4V
Built-in Crossover
Crossover Frequency Range
Front High-Pass (HP): 50Hz-500Hz 12dB/octave Butterworth

Front Low-Pass (LP): 50-500Hz 12dB/octave Butterworth

Rear High-Pass (HP): 50Hz-500Hz 12dB/octave Butterworth

Rear Low-Pass (LP): 50-500Hz 12dB/octave Butterworth
Bass Boost Control
Front Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or

Front Punch EQ2 Treble: 0dB to +12dB @ 12kHz

Rear Punch EQ2 Bass: 0dB to +18dB @ 45Hz and/or

Rear Punch EQ2 Treble: 0dB to +12dB @ 12kHz

Function depends upon LP/AP/HP switch position
CEA-2006 Compliant
I/O Ports
Signal Input Low level: 2 RCA pair

Power Input Connector: 4 AWG Block

Speaker Output Connector: 8 AWG to 18 AWG Screw terminal barrier strip
2.25" x 7.63" x 13.02"


12dB/octave crossover

4 Gauge power/ground terminals

Audiophile grade speaker connections

MOSFET output stage

MOSFET power supply

Top Mounted LED Indicators

Efficiency (average): 71% @ 4-Ohm; 70% @ 2-Ohm

Heat Sink Type: Cast aluminum

Cooling: Convection

Visual Indicators: Power, Thermal, Protect

Manufacturer Warranty

1 year limited
1 year limited

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

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  • Ronald C.
  • 3/5/2012 6:56:10 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat amp

Pros: Great clean power, Do not hesitate to buy! Pushing a pair 6x9 and 6.5 inch speakers with power to spare. Great value"

Cons: None to speak of.

Did you find this review helpful? Yes No

  • Brandon D.
  • 12/23/2011 3:46:57 PM
  • Tech Level: High
  • Ownership: more than 1 year

5 out of 5 eggsFantastic Amp

Pros: Great amp for the price, you often times get much more power then you are supposed too. I bought mine refurbished and it does 77rms per channel. Solid amp, great construction and powers 4 speakers with ease.

Cons: It is heavy. Can overheat, but what amp does not get hot?
The name is recognized, so it could be subject to theft over other brands.

Other Thoughts: This is a really nice amp for the price. I recommend if your looking for some quality power that does not break the bank.

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  • Anonymous
  • 12/21/2011 10:50:44 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year

4 out of 5 eggsDecent

Pros: Put out the power you need for sure. Actually, if you are driving door speakers with these you will most likely not use the full power. IF YOU DO DRIVE SPEAKERS HARD, refer to cons section

Cons: It gets hot easily when driving speakers hard. Alpine amp of comparable quality actually got hotter easier. All but the best amps overheat but this one in particular gets pretty hot.

Other Thoughts: Powering:
1 set 125rms Image Dynamics Comps (front)
1 set 75rms Alpine Coax (rear)

Did you find this review helpful? Yes No

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Home > 
Automotive > 
Car Electronics > 
Car Amplifiers > 
Rockford > 
Item#: 9SIA15511G6432
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