Please wait...
Please wait...
Our website uses cookies so that you can place orders and we can provide a better service. Continue to use the site as normal if you're happy with this, or find out how to manage cookies.
Please wait...
Alpine Car Audio Systems KTP-445 Head Unit In Line Power Amplifier KTP-445A
£108.84 Save £91.14  was:£199.98
Click to Close

Fit it Yourself?

Everything you need to fit it yourself at home

Only £30.00 

With Steering Wheel Control
Only £50.00 

5 Stars (7)

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

Save: £91.14 (46%)  rrp: £199.98
5 Stars
7 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: £91.14 (46%)
rrp: £199.98

  • COVID-19 We are open online & shipping orders during the COVID-19 pandemic
  • Free Car Air Freshener with every order Free Car Air Freshener with every order
  • Next Day Delivery available on all orders before 5pm Next Day Delivery available on all orders before 5pm
  • Easy Returns Easy Returns

Click image to zoom

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
Please wait...
Customer reviews

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.

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.

View all reviews

Write a review
Review Title: 

How many would you give this product?

Newsletter sign up

Questions/Answers About This Product
  • Question: 27 April 2020
    Hi. I have a CDE-111RM in my Lotus Elise from 2010. I assume this would work with the unit? Also, Is there a Bluetooth unit that can be added like the KCE-400BT?

    The Alpine ampo will work but the KCE-400BT is too expensive and not available ATM, I would say buy the KTP-445 and a new car stereo with Bluetooth

    CDE-178BT Flag ship model with Bluetooth iPhone and Android Compatible
    KTP-445 Head Unit In Line Power Amplifier 100Watts

    Found Useful? Yes 

  • Question: 11 April 2020
    Car: Land Rover Defender - 2004>

    Will this Alpine inline also work with a JVC head unit? JVC Single DIN DAB+ Radio KD-X561DBT?

    The Alpine KTP445 will not work with any other units other then then Alpine. The Pioneer GMD will work with the JVC and the Pioneer GMD comes with all the wires

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

    Found Useful? Yes 

  • Question: 10 October 2019
    Car: Porsche

    Do you have a KTP-445U, or can you supply the universal harnesses?


    sorry we no longer have any of the universal models and they cannot be converted either as the units have a lower input level alpine specific models due to the alpines output being higher so if you try and make it universal the volume output will be very low, you would be better buying the GMD1004 from pioneer which can be used universal either speaker level in or phono

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

    Found Useful? Yes 

  • View All
Got a Question about this Product?

The email address is required to email you when your question has been answered

Car Make
Car Model

chars left

Newsletter sign up

N.B. Questions are answered during office hours
Please don't put sensitive info in the question.

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