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

 
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 FOUR
Low Stock 
$379.99
  • 180 watts RMS x 2 at 4 ohms
  • speaker-level inputs
  • Class A/B design
Add to Cart

Product Features

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Condition New StockNew Stock
Performance Alpine KTP-445A Power PackHelix Blue B FOUR
RMS Power Output (Wt x Channels)
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45 x 4
60 x 4
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 Hz10-30k 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 FOUR
Amplifier Class
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DAB
Low-Pass Crossover Frequency
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N/A40-4000 Hz
Low-Pass Slope (dB/octave)
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N/AN/A
High-Pass Crossover Frequency
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N/A15-4000 Hz
High-Pass Slope (dB/octave)
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N/AN/A
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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1550
Speaker Level Inputs
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HarnessHarness
Preamp Outputs
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No1 pair
Width (inches)
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7-7/814-1/4
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 FOUR
Low Stock 
$379.99
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.