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Alpine Car Audio KTP-445A Head Unit In Line Power Amplifier 100WattKTP-445A
£124.99 Save £74.99  was:£199.98
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5 Stars (8)

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

Save: £74.99 (37%)  rrp: £199.98
5 Stars
8 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.

Condition: New

Save: £74.99 (37%)
rrp: £199.98
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Key Features

Head Unit In Line Power Amplifier 100Watts - Alpine Car Audio 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.

***For Alpine Headunits Only! 

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

Download image of Alpine Car Audio KTP-445A Click here for Image of Alpine Car Audio 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

My experience with the "brick" amp KTP445A
GEORGE CHELUSI on 20/04/2021 4 star rating

I got this amp together with alpine UTE92BT head unit, and jbl Club component 16.5x4Spekers, i wanted small ,compact and less wiring as possible to hide it behind the dash. I'm really impressed with the quality sound of this amp for such a small "brick". I will rate this amp at only 4 stars bcz i had several problems having to do with the power supply from car OEM that comes in line with the head unit, after one week of intense use the OEm fuse blown bcz I am a heavy listener and at high volumes amp needs more power(amps) the 18awg car oem wiring was unable to deliver the minimum 25amps needed for the amp and head unit so voltage drop happen ,after 22volume (from 35) a kinda protection was coming on and volume was automatically dropping at 7level. So what i did I've upgrade the constant12v and ground with 12awg from the battery and went to amp iso to connect it(you need to cut old wire and isolate maybe in the future you might solder back). I have to say that i can go over 18volume level bcz is much louder after wire upgrade and no protection coming on at high sound levels. Very very happy with the outcome 😊☺️ small, compact and quality sound. Also if i have to buy it again i will go for the other version ktp445U as you can put proper wiring and also better sound quality. I hope that this review will help others to know the pro and cons for this amp. Also head unit and amp very good combo high quality and Manny functions.

Susan on 10/05/2020 3 star rating

I tried this amp, it is okay. Was not really up to the job and found it a little harsh, upgraded to the In Phase IPA 601 which is a real amp compared to this baby. I guess you are paying for the name here.

Alpine amp
Mark on 29/03/2020 5 star rating

I think this is a brilliant idea I’ve just fitted a new component system in my car with two amplifiers was very tight for space as it’s only two seater sports car for design and space saving I think it’s very good that the only drawback I have is does this unique get hot because next to a stereo as well I’m not saying it will all catch fire but it’s It’s worth looking into how hot it does get I’m sure this won’t be a major problem but something that I would think about as the H could damage your car stereo.

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Questions/Answers About This Product
  • Question: 12 January 2022
    Will this work with a Alpine CDE-181RR?


    Yes, this will work with the Alpine CDE-181RR.

    Found Useful? Yes 

  • Question: 31 December 2021
    Car: Hyundai Tuscon - 2005 >

    Hi for a 2017 hyundai tucson what adapter do i require to make this fit?

    Thank you


    The amplifier should come with the necessary parts required for the installation.

    Found Useful? Yes 

  • Question: 14 June 2021
    Car: BMW 3 Series (E46) - 2005> (E90)

    RE: 2007 BMW 3 series

    Will this work on my car? The factory head unit is made by Alpine.
    Would any harnesses be required?
    Many thanks,


    The amplifier will normally work on this vehicle perfectly fine with an aftermarket headunit. However, this only applied to none OEM-amplified vehicles.

    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:

120 - 122 Alfreton Road, Nottingham, Nottinghamshire, NG7 3NR
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