JL Audio XD500/3 vs Alpine KTP-445U Power Pack

 
JL Audio XD500/3
DISCONTINUED 
$349.99
  • 75 watts RMS x 2 at 4 ohms + 300 watts RMS x 1 at 2 ohms
  • preamp and speaker-level inputs
  • variable low- and high-pass filters
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Alpine KTP-445U Power Pack
In Stock 
$149.99
  • runs off same power circuit as receiver (must be 15-amp or more)
  • compact amplifier with universal plug for in-dash receivers
  • 45 watts x 4 at 4 ohms
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Product Features

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Condition New StockNew Stock
Performance JL Audio XD500/3Alpine KTP-445U Power Pack
RMS Power Output (Wt x Channels)
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75 x 2
180 x 1
45 x 4
Peak Power Output (Wt x Channels)
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---90 x 4
Power at 2 Ohms (Wt x Channels)
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100 x 245 x 4
Bridged Power (Wt x Channels)
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150 x 190 x 2
Minimum Impedance Bridged
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44
Minimum Impedance Unbridged
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22
Best Frequency Response
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12-22k Hz20-20k Hz
THD at Rated RMS Power
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1%1%
Signal to Noise Ratio
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104 dB82 dB
Input Voltage
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14.4v14.4v
Features JL Audio XD500/3Alpine KTP-445U Power Pack
Amplifier Class
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DD
Low-Pass Crossover Frequency
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50-500 HzN/A
Low-Pass Slope (dB/octave)
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12 or 24 dB/octN/A
High-Pass Crossover Frequency
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50-500 Hz60, 80, 120Hz
High-Pass Slope (dB/octave)
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12 dB/oct12 dB/oct
Bass Boost
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NoNo
Bass Boost Frequency
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N/AN/A
Fan Cooled
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NoNo
Fuse Rating
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5015
Speaker Level Inputs
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RCA (adapter req)Harness
Preamp Outputs
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1 pairNo
Width (inches)
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8-9/167-7/8
Height (inches)
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21-1/2
Depth (inches)
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7-1/82-9/16
Parts Warranty
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2 Years1 Year
Labor Warranty
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2 Years1 Year
  Owner's ManualOwner's Manual
 Hands-on ResearchHands-on Research
 
JL Audio XD500/3
DISCONTINUED 
$349.99
Add to Cart
Alpine KTP-445U Power Pack
In Stock 
$149.99
Add to Cart

Video: Car Amplifier PowerWe describe the basics of deciding how much power an amplifier should have when you're trying to match it to your speakers or subwoofers.

Video: Car Amplifier ChannelsOne of the first steps in choosing an amplifier for your car audio system is to decide how you intend to use the amplifier, and thus how many channels it should have. This short video gives you a quick overview to help answer that question.