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Product comparison
Car Amplifiers Comparison

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Rockford Fosgate R2-300X4
Prime Series 4-channel car amplifier — 50 watts RMS x 4
In stock
$219.99
  • 150 watts RMS x 2 bridged
  • variable high- and low-pass filters
  • preamp and speaker-level inputs
Remove

Adding...
Top Seller
Alpine KTP-445A Power Pack
Compact upgrade amplifier for your Alpine receiver — 45 watts RMS x 4
  • dimensions: 7-7/8"W x 1-1/2"H x 2-9/16"D
  • compact amplifier for Alpine in-dash receivers
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Adding...
Rockford Fosgate Prime R400-4D
4-channel car amplifier — 75 watts RMS x 4
Low stock
42 reviews
$219.99
  • 200 watts RMS x 2 bridged
  • variable high- and low-pass filters
  • preamp inputs and outputs
     
Condition New Stock New Stock New Stock
Performance Rockford Fosgate R2-300X4 Alpine KTP-445A Power Pack Rockford Fosgate Prime R400-4D
RMS Power Output (Wt x Channels) 50 x 4
45 x 4
75 x 4
Peak Power Output (Wt x Channels) N/A 90 x 4 ---
Power at 2 Ohms (Wt x Channels) 75 x 4 N/A 100 x 4
Bridged Power (Wt x Channels) 150 x 2 N/A 200 x 2
Minimum Impedance Bridged 4 N/A 4
Minimum Impedance Unbridged 2 2 2
Best Frequency Response 20-20k Hz 20-20k Hz 20-20k Hz
THD at Rated RMS Power 1% 1% 1%
Signal to Noise Ratio 70 dB 84 dB 90 dB
Input Voltage 14.4v 14.4v 14.4v
Features Rockford Fosgate R2-300X4 Alpine KTP-445A Power Pack Rockford Fosgate Prime R400-4D
Amplifier Class D D D
Low-Pass Crossover Frequency 50-250 Hz N/A 50-250 Hz
Low-Pass Slope (dB/octave) 12 dB/octave N/A 12 dB/oct
High-Pass Crossover Frequency 50-250 Hz N/A 50-250 Hz
High-Pass Slope (dB/octave) 12 dB/octave N/A 12 dB/oct
Bass Boost No No 0-18 dB
Bass Boost Frequency N/A N/A 45 Hz
Fan Cooled No No No
Fuse Rating 60 15 40
Speaker Level Inputs Harness Harness No
Preamp Outputs 1 pair No 1 pair
Width (inches) 10-1/16 7-7/8 9-1/8
Height (inches) 2 1-1/2 2
Depth (inches) 7-3/4 2-9/16 7-3/8
Parts Warranty 1 Year 1 Year 1 Year
Labor Warranty 1 Year 1 Year 1 Year
  Owner's Manual Owner's Manual Owner's Manual
Hands-on Research Hands-on Research Hands-on Research
Remove

Adding...
Rockford Fosgate R2-300X4
Prime Series 4-channel car amplifier — 50 watts RMS x 4
In stock
$219.99
Remove

Adding...
Top Seller
Alpine KTP-445A Power Pack
Compact upgrade amplifier for your Alpine receiver — 45 watts RMS x 4
Remove

Adding...
Rockford Fosgate Prime R400-4D
4-channel car amplifier — 75 watts RMS x 4
Low stock
42 reviews
$219.99
TOP