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Alpine - Power Pack 180W Class D Bridgeable Multichannel Amplifier with High-Pass Filter - Black

Model:KTP-445U
SKU:4769803
Your price for this item is $289.99
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Warranty Protection Plans
Standard Geek Squad Protection
What's IncludedTerms & Conditions
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Installation: Available at select stores

More installation info is available in checkout

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Specifications
  • Key Specs

    Continuous Watts x Channel @ Ohms
    45W x 4 x 2
    Maximum Watts x Channel @ Ohms
    45W x 4 x 4
    Amplifier Class
    D
    Number Of Channels
    4
    Bass Boost
    None
    Bridgeable
    true
    Low-Pass Crossover
    None
    High-Pass Crossover
    Variable
    Speaker-Level Inputs
    true
  • Compatibility

    Voice Assistant Built-in
    No
  • General

    Product Name
    Power Pack 180W Class D Bridgeable Multichannel Amplifier with High-Pass Filter
    Brand
    Alpine
    Mounting Hardware Included
    true
    Model Number
    KTP-445U
    Color
    Black
  • Audio Power

    Continuous Watts x Channel @ Ohms
    45W x 4 x 2
    Maximum Watts x Channel @ Ohms
    45W x 4 x 4
    Watts Per Channel Maximum
    45 watts
    Amplifier Class
    D
  • Audio

    Number Of Channels
    4
    Minimum Frequency Response
    20 hertz
    Maximum Frequency Response
    20 kilohertz
    Total Harmonic Distortion
    0.01 percent
    Signal-to-Noise Ratio (SNR)
    80 decibels
    Bass Boost
    None
  • Features

    Bridgeable
    true
    Low-Pass Crossover
    None
    High-Pass Crossover
    Variable
    MOSFET Power Supply
    true
    Bluetooth Enabled
    false
    Remote Control Included
    No
    Marine
    false
    Fan Cooled
    false
  • Input

    Line-Level Inputs
    true
    Speaker-Level Inputs
    true
  • Output

    Preamp Outputs
    false
  • Dimensions

    Product Height
    1.5 inches
    Product Width
    2.63 inches
    Product Depth
    1.5 inches
    Product Weight
    3.3 pounds
  • Warranty

    Warranty - Parts
    1 year
    Warranty - Labor
    1 year
  • Other

    UPC
    793276011916
Features

Give your car stereo system a power boost with this Alpine Power Pack KTP-445U 180W Class D bridgeable 4-channel amplifier that features a 12dB/Oct high-pass filter for powerful sound.

  • Geek Squad installation

    is strongly recommended for this product. Please visit your local Best Buy store for details.

  • Handles up to 45W RMS (continuous) @ 4 ohms or 2 ohms

    For powerful sound. Up to 90W continuous bridged.

  • 12dB/Oct high-pass filter

    Along with variable gain ensures flexible operation.

  • 4 ohms bridged impedance

    Conducts power evenly to keep the speaker at an appropriate level.

  • RCA and auto sensing speaker-level connectors

    Enable simple installation.

What's Included

  • Alpine Power Pack 180W Class D Bridgeable Multichannel Amplifier with High-Pass Filter

  • Wiring harness with RCA connectors

  • Owner's manual

Questions & Answers (62)
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This Product
Alpine - Power Pack 180W Class D Bridgeable Multichannel Amplifier with High-Pass Filter - BlackAlpine - Power Pack 180W Class D Bridgeable Multichannel Amplifier with High-Pass Filter - Black
Your price for this item is $289.99
 
Continuous Watts x Channel @ Ohms
45W x 4 x 2
60W x4 @ 4 ohms
50 Watts x 4 @ 4 Ohm; 45 Watts x 4 @ 2 Ohm; 100 Watts x 2 bridged @ 4 Ohm
45 Watts x 4 @ 4 Ohm
Maximum Watts x Channel @ Ohms
45W x 4 x 4
90 watts RMS x4 @ 2 ohms
100 Watts x 4
Data Not Available--
Amplifier Class
D
D
D
D
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Reviews

Rating 4.7 out of 5 stars with 776 reviews

Rating by feature

  • Rating 4.6 out of 5 stars

  • Rating 4.7 out of 5 stars

  • Rating 4.7 out of 5 stars

96%would recommend to a friend

Customers are saying

Customers highly value the Power Pack 180W Class D Bridgeable Multichannel Amplifier for its exceptional sound quality, compact size, and ease of installation. Many customers rave about the remarkable sound improvement it brings to their audio systems, particularly the front speakers. The compact design of the amplifier is also widely appreciated for its convenience and versatility in various installations.

This summary was generated by AI based on customer reviews.

Top Mentions filter

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

  • Rated 5 out of 5 stars

    I Highly recommend the 445u

    This amp was my first car audio purchase since college…. Tech has caused things to shrink, yet still be efficient- this amp is an example of that. Before I begin - let me say I like a clean factory look…. I try to keep things factory but the sound was terrible. It is in my 2010 FJ Cruiser…. Pushing new component 6x9 speakers …. From a pioneer wireless CarPlay headunit. It makes a world of difference - 4x40 rms for sure - just enough to be loud and clear…. I haven’t pushed the speakers yet as I don’t blast things- but music is so much more different with an amp. You’re missing details in your music if you’ve only ever used a stock stereo- yes even jbl. If you like that factory look- this will work with your factory radio- an extremely easy install as well …. This amp takes up very little space but does its job very well. Super easy install as it can run off the headunit within certain parameters…. Just get it.

    Posted by JRock

  • Rated 4 out of 5 stars

    Great Little Amp!

    Great little amp. Got it for my '78 F150 to run door speakers & 6x9s behind seat. Loud, clear sound. Nice compact size. I have it temporarily mounted with zip ties in the pics. (The actual mounting brackets are missing but that is Best Buy's fault) Plan to remount it more securely later. Only reason I didn't give it 5 stars is the location of the adjustments, gain, etc.

    Posted by Installed

  • Rated 5 out of 5 stars

    Reliable and compact

    Replaced my stock Bose speakers with Alpine R series and used this amp to power them. Provides a lot more power and at half the size. Could even fit behind your dash.

    Posted by holanj

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