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Alpine Car Audio Systems KTP-445 Head Unit In Line Power Amplifier KTP-445A
£109.99 Save £89.99  was:£199.98
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Everything you need to fit it yourself at home

Only £30.00 

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5 Stars (5)
4 Channel Amplifiers Alpine Car Audio Systems KTP-445A

Alpine Car Audio Systems KTP-445 Head Unit In Line Power Amplifier 100Watts

Save: £89.99 (45%)  rrp: £199.98
5 Stars
5 Review(s) / write a review
Quickfind Code - 26445
Quick Summary:

This compact upgrade instantly boosts the power of your system. Easy to install with no additional wiring, it fits neatly behind your head unit.

Save: £89.99 (45%)
rrp: £199.98
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On Orders Over £300

  • Free Car Air Freshener with every order Free Car Air Freshener with every order
  • Next Day Delivery available on all order before 5pm Next Day Delivery available on all order before 5pm
  • Easy Returns Easy Returns
  • 1 Year Easy Warranty 1 Year Easy Warranty

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Key Features

KTP445 Head Unit In Line Power Amplifier 100Watts - Alpine Car Audio Systems KTP-445A

This compact upgrade instantly boosts the power of your system.
Easy to install with no additional wiring, it fits neatly behind your head unit.

Download Alpine Car Audio Systems KTP-445A manual Click here to download manual

Download image of Alpine Car Audio Systems KTP-445A Click here for Image of Alpine Car Audio Systems KTP-445A
Technical Specification
General Features:
  • 4 x 100W MAX
  • 4 x 45W RMS
  • Works with all 2005 - present Alpine head units
  • Plug & Play installation (no additional wiring required)
  • High/Low gain switch
  • Compact size
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Customer reviews

Packs a very small punch
Tom Palmer on 12/09/2016 4 star rating

The KTP-445A is a very easily installed amplifier for use with 2005 and newer Alpine Headunits. It is a very simple install: 1. unplug the head unit 2. plug in the KTP-445A(assuming the alpine is already installed) 3. reinstall the head unit That easy. If you dont have an Alpine Headunit, get the KTP-445U, which is universal, and will require some splicing/wiring skills. I have had this installed for about a month now. Here is what I think: The PROS: 1. Ease of installation, seriously, find a small, well ventilated (it gets hot) place to stash it within about 3-4 feet of the headunit. I zip tied it to a wire bundle under the dash 2. Very compact amp, see above. 3. Specs are impressive (for the size), especially compared to some of the competitors. Clear, un-distorted audio for those who don't need to win any competitions. The CONS: 1. For the price, I would expect preamp output compatibility. This only uses your speaker level inputs. There are two plugs, one input (power/ground/speaker/etc), and one output (speaker). It would have been easy to make the speaker level inputs a separate plug and add low level inputs. 2. Due to the above, the volume doesn't get much louder then just the headunit, but it is clearer and less distorted at those higher levels. Overall, 4 out of 5. This is due to how compact the amp is and the ease of install. I probably wouldn't purchase it again, but a day turning wrenches is my favorite kind of day.

great for small cars
mark on 12/05/2015 5 star rating

using one of these with my alpine unit in a citreon ds3 i didnt want to add lots of stuff to the car as im only going to own it for a year and dont want anything i cant just put back to standard, even i could install this without any issues just plugs straight in

Alpine KTP-445
IANMIDDLETON on 03/02/2015 5 star rating

If you don't have much space or don't want huge amp's cluttering up your boot this is perfect.

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Questions/Answers About This Product
  • Question: 29 December 2018
    Car: Nissan

    What means no wiring required?


    The KTP-445 is designed to work with any Alpine unit. So it is a plug and play solution.

    Found Useful? Yes 

  • Question: 10 May 2018
    Hi there,

    Do you stock the Apline KTP-445U (universal) model or know where I could purchase one? Looking for the separate gain controls without Apline head.

    Many Thanks,

    you would be better off with the GMD1004 as its cheaper, and will do the same job

    GM-D1004 - 400W 4 Channel Easy Install Amplifier with TVC concept and input sensor

    Found Useful? Yes 

  • Question: 23 January 2017
    Car: Toyota Landcruiser - 2005 >

    hi there cant decide which head unit to buy for good sound quality looking at the alpine CDE-178BT and the CDA-137BTI which says is the flagship model but the only 1 with DAB is the CDE-196 DAB?


    Thanks for your question, The CDE-196DAB is the only DAB unit, all of those mentioned are great for sound, however if it is sound & quality, there is the Pioneer DEH80PRS which has 24 bit DAC processor & binary EQ

    DEH-80PRS Competition Grade CD tuner with Bluetooth

    Found Useful? Yes 

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Fitting Services

Need help with Installation?

Here at CarAudioCentre we offer a professional and reputable fitting service in all our stores. For all fitting enquiries and bookings please visit or call one of our nationwide stores. Our fitters can install your new car stereo, DAB radio, audio visual, speakers, subwoofers or amplifier. We can also help to connect your iPod or MP3 player to you existing audio unit and can offer the best advice on the right in-car entertainment for your vehicle, to further this more we also offer a total 100% custom installation service for demo and show vehicles. So if you have an idea come on in and run it past us, the possibilities are endless and we are never too busy for an enthusiastic chat about our favourite subject.

Please note:

"That our two year warranty on products is only applicable to purchases made directly from us and that have been fitted in one of our stores."

Our Stores:

542 546 Mansfield Road, Sherwood NG5 2FR
Tel: 0115 9624 986
743-745 Eastern Ave, Newbury Park, London, IG2 7RT
Tel: 0208 599 2368
835 Garratt Lane, Tooting, London, SW17 0PG
Tel: 0208 971 9181

Owner's Manual