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Frequently Compared Car Amplifiers

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Rockford Fosgate R2-250X1
Prime Series mono subwoofer amplifier — 250 watts RMS x 1 at 2 ohms
$179.99
  • 150 watts RMS x 1 at 4 ohms
  • variable low-pass filter, subsonic filter, and bass boost
  • preamp and speaker-level inputs
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Memphis Audio SRX250.1
Street Reference mono subwoofer amplifier — 250 watts RMS x 1 at 2 ohms
In stock
$159.99
  • 150 watts RMS x 1 at 4 ohms
  • variable low-pass and subsonic filters
  • variable bass boost
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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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Alpine KTA-450 Power Pack
Compact 4-channel car amplifier — 50 watts RMS x 4
  • 100 watts RMS x 2 bridged at 4 ohms
  • Dynamic Peak Power (DPP) technology adds a burst of power when needed
  • PowerStack bracket included for mounting amp behind Alpine iLX-W650 digital multimedia receiver (#500ILXW650)
       
Condition New Stock New Stock New Stock New Stock
Performance Rockford Fosgate R2-250X1 Memphis Audio SRX250.1 Alpine KTP-445A Power Pack Alpine KTA-450 Power Pack
RMS Power Output (Wt x Channels) 150 x 1
150 x 1
45 x 4
50 x 4
Peak Power Output (Wt x Channels) --- --- 90 x 4 100 x 4
Power at 2 Ohms (Wt x Channels) 250 x 1 250 x 1 N/A 45 x 4
Bridged Power (Wt x Channels) --- N/A N/A 100 x 2
Minimum Impedance Bridged --- N/A N/A 4
Minimum Impedance Unbridged 2 2 2 2
Best Frequency Response --- 30-250 Hz 20-20k Hz 15-50k Hz
THD at Rated RMS Power --- 0.5% 1% 1%
Signal to Noise Ratio --- 92 dB 84 dB 82 dB
Input Voltage --- --- 14.4v 14.4v
Features Rockford Fosgate R2-250X1 Memphis Audio SRX250.1 Alpine KTP-445A Power Pack Alpine KTA-450 Power Pack
Amplifier Class AB AB D D
Low-Pass Crossover Frequency 50-250 Hz 30-250 Hz N/A No
Low-Pass Slope (dB/octave) 12 dB/octave 12 dB/octave N/A N/A
High-Pass Crossover Frequency --- N/A N/A Off, 60, 80, 120Hz
High-Pass Slope (dB/octave) --- N/A N/A 12 dB/octave
Bass Boost 0-12 dB 0, 6, 12 dB No No
Bass Boost Frequency 45 Hz 45 Hz N/A N/A
Fan Cooled --- No No No
Fuse Rating 30 30 15 20
Speaker Level Inputs Harness No Harness RCA
Preamp Outputs 1 pair No No No
Width (inches) 11-1/4 11-3/8 7-7/8 7
Height (inches) 2 2-3/16 1-1/2 1-3/8
Depth (inches) 7-3/8 8 2-9/16 3-9/16
Parts Warranty 1 Year 1 Year 1 Year 1 Year
Labor Warranty 1 Year 1 Year 1 Year 1 Year
  Owner's Manual Owner's Manual Owner's Manual Owner's Manual
Hands-on Research Hands-on Research Hands-on Research Hands-on Research
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Rockford Fosgate R2-250X1
Prime Series mono subwoofer amplifier — 250 watts RMS x 1 at 2 ohms
$179.99
Remove

Adding...
Memphis Audio SRX250.1
Street Reference mono subwoofer amplifier — 250 watts RMS x 1 at 2 ohms
In stock
$159.99
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Top Seller
Alpine KTP-445A Power Pack
Compact upgrade amplifier for your Alpine receiver — 45 watts RMS x 4
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Alpine KTA-450 Power Pack
Compact 4-channel car amplifier — 50 watts RMS x 4
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