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Alpine KTP-445A Power Pack vs Helix Blue B FIVE

 
Alpine KTP-445A Power Pack
In Stock 
$129.99
  • dimensions: 7-7/8"W x 1-1/2"H x 2-9/16"D
  • compact plug-and-play amplifier for Alpine in-dash receivers
Add to Cart
Helix Blue B FIVE
In Stock 
$549.99
  • 180 watts RMS x 2 bridged + 250 watts RMS x 1 at 4 ohms
  • speaker-level inputs
  • Class AB design on front and rear channels, Class D on sub channel
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Product Features

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Condition New StockNew Stock
Performance Alpine KTP-445A Power PackHelix Blue B FIVE
RMS Power Output (Wt x Channels)
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45 x 4
60 x 4
250 x 1
Peak Power Output (Wt x Channels)
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90 x 4180 x 4
Power at 2 Ohms (Wt x Channels)
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N/A90 x 4
Bridged Power (Wt x Channels)
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N/A180 x 2
Minimum Impedance Bridged
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N/A4
Minimum Impedance Unbridged
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22
Best Frequency Response
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20-20k Hz10-30000 Hz
THD at Rated RMS Power
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1%0.03%
Signal to Noise Ratio
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84 dB95 dB
Input Voltage
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14.4v---
Features Alpine KTP-445A Power PackHelix Blue B FIVE
Amplifier Class
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DAB/D
Low-Pass Crossover Frequency
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N/A40-4000 Hz
Low-Pass Slope (dB/octave)
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N/ANA
High-Pass Crossover Frequency
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N/A15-4000 Hz
High-Pass Slope (dB/octave)
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N/ANA
Bass Boost
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No0-18 dB
Bass Boost Frequency
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N/A45 Hz
Fan Cooled
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NoNo
Fuse Rating
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1590
Speaker Level Inputs
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HarnessHarness
Preamp Outputs
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NoNo
Width (inches)
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7-7/817-15/16
Height (inches)
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1-1/22
Depth (inches)
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2-9/1610-1/4
Parts Warranty
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1 Year2 Years
Labor Warranty
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1 Year2 Years
  Owner's ManualOwner's Manual
 Hands-on ResearchHands-on Research
 
Alpine KTP-445A Power Pack
In Stock 
$129.99
Add to Cart
Helix Blue B FIVE
In Stock 
$549.99
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.