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Alpine KTP-445U 4 Channel 45W Power Pack Car Amplifier
frogheadindustries (1241)
100% positive feedback
Price:
$275.00
Free shipping
Returns:
Condition:
Owner's Manual (English/ French/ Spanish). Class D amp technology. What's in the box 5.5" Speaker-level/low-level input harness (Turn-on lead is 40" long). 30" Power/speaker-output harness. 15-amp ATM mini-blade fuse (installed).
- Buy It NowAlpine KTP-445U 4 Channel 45W Power Pack Car Amplifier
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About this product
Product Identifiers
BrandAlpine
MPNKTP-445U
UPC0793276012395, 4958043510788, 0793276011916, 0093276011917, 4958043541782
eBay Product ID (ePID)114789503
Product Key Features
RMS Power45W
Channels4
ModelKTP-445U
Dimensions
Width7.875in.
Additional Product Features
RMS Power AT 2ohm45W
Signal to Noise Ratio82dB
Amplifier TypeMulti Channels
Bass BoostWithout Bass Boost
RMS Power AT 4ohm90W
All listings for this product
Ratings and Reviews
Most relevant reviews
- May 30, 2023Top favorable review
Great for improving sound quality from factory radio
I was finally able to install this after a few months of having it. It does have better sound quality than the factory head unit. I also replaced the door speakers with quality ones to match the sound. I was able to set the gains and stuff it under my dash. I also purchased a harness side wire harness, and a stereo side wire harness to solder the inputs and outputs to. I also grounded the amp to the head unit and the chassis. My only beef with this unit is that the bass doesn't hit as hard as I would have liked from adding 180 watts to my stereo system. This is why i took away 1 star. This is not the seller's fault at all, just my pickiness. All in all, I'm happy with this as I'm not looking to make noise going down the road, just hear my music with better quality. There is no alternator whine, and it does what it's supposed to do.Verified purchase: YesCondition: Pre-owned
- Aug 12, 2016Top critical review
alpine ktp-445u
This is a nice little amp. Not bad but perhaps too few watts for my liking. I connected it to the rca outputs on my new jvc head unit but it doesn't seem to have more usable power than the head unit. I am not an audio expert but I have been playing guitar in bands for about 40 years. ThanksVerified purchase: YesCondition: Pre-owned
- Feb 02, 2016
Compact and good power
Very good price brand new, and very versatile. Small enough to hide inside your dash. These are a solid state unit so not much to go wrong with these so don't be afraid to purchase one of these used as well - long as it has both wire harnesses its supposed to come with. 45 watts RMS per channel may not seem like a big power number, but it is a world of difference on a factory radio (without external amp already) or even any aftermarket head unit, most of which you're probably lucky to get 10 watts RMS per channel with. Has no problem reproducing low tones for your door speakers, and even for a low price class D amp it can do the highs clearly as well. It's made to plug completely into all your factory speaker outputs and power/ground wires, has four-channel input so you don't lose your fader at the head unit. Another useful feature is its low pass crossover that can be set at several frequencies - useful for if you're still using factory door speakers, and/or have an added subwoofer system.Verified purchase: YesCondition: Pre-owned
- Apr 12, 2016
Perfect fit for my s197 2005 ford mustang coupe
Installed this little guy behind my new single DIN mechless pioneer deck. Since i have the shaker 500 system and am still using the shaker subs, i opted to use the Pioneer RCA's for the factory subs and use the line level inputs to feed the Alpine powering the 4 full range speakers. The pioneer head unit was loud enough to begin with but adding the Alpine made everything so much louder and clearer. The Alpine does get a bit warm when in use but its negligible. I have the gain set at 25% and there's no need to go higher. All in all i am happy with my setup and would use the amp again. Install was pretty easy and straightforward. When i swap the shaker subs i will reconnect the RCA jacks to the alpine to see if there is any improvement in sound.Verified purchase: YesCondition: New
- May 01, 2022
Is better than the Alpine head units 18w RMS x 4. Bass is more controlled and hits harder.
It was a nice Plug and Play and way too much wiring to try and put somewhere. Had to put wireloom on all of it for protection against the sharp edges of Civic dash braces. For my 2002 Civic LX sedan it would have fit better behind my accessory plug panel if it was a little shorter. I cut some 1/4" rubber pieces to put on the right and left side to protect the wires coming out of the amp from those sharp edges of the braces. It will only fit with the label facing outward(or 180 inward) since that is the thinnest dimension or the accessory plug will hit when installing that panel.
Verified purchase: YesCondition: New
- Jun 08, 2021
Great for what it is
My previous car audio setup before adding this was alright but not great I could hit about 14 on the head unit (new alpine one) with brand new speakers before major distortion started to occur. After adding this it boosted the sound level at lower volumes as well as allows me to reach a higher level of sound before the distortion occurs. It is also great in that at least in my vehicle it can hide behind the head unit and not have to worry about running any wiring.Verified purchase: YesCondition: New
- Jun 29, 2021
Great Amplifier
The small 4 channel amp is powerful enough to satisfy your audio desires. I paired the amp with two pairs of 4-way Pioneer 6x8 speakers. I’m able to turn the volume up a lot louder, now that I have the amp. Previously, the sound would distort at about 60% max volume. Now, I can turn the radio all the way up and it just sounds better!Verified purchase: YesCondition: New
- Aug 18, 2020
A truly amazing amplifier from Alpine!
A great amp. Just read any of the many pro reviews online and you'll find that nobody has anything bad to say about this amp. It's a marvelous piece of engineering. It's bridgeable to 90 RMS x 2. It's extremely efficient so it won't over work a vehicles electrical or charging system. It's compact in size and doesn't generate much heat. It's very clean with impressive numbers all around. If you're buying something cheaper...you're certainly getting something cheaper. If cheaper is what you're trying to achieve, then good luck. For those of you that can recognize a winner...here's your champ!Verified purchase: YesCondition: Pre-owned
- Jul 29, 2020
KTP-445A VS KTP-445U
Make sure to get the 445U model if you have any make but ALPINE cuz the 445A is made for alpine and it has less options than the 445U, I ordered the 445A thinking it was the 445U and I had to do some modifications to make it work for my factory radio and it did work but not as good as the universal 445U , the one I’ve got doesn’t have the frequency adjustment neither the gain adjustments after all I told myself that I have to post this so ppl don’t do the same mistake that I did. You will be able to tell the difference once it’s all installed the right way I read so many reviews and I am amaze of ppl, the reviews will pick you up for a minute and then will slam you down to the ground It worked for me but somehow it didn’t work for others and all the reviews that I read didn’t do me any good I had to try for myself and I am happy with what I’ve got ( not really ) cuz I ordered the wrong one but at the end it’s still an alpine and that’s pretty good enough for me Thank you for reading and good luckVerified purchase: YesCondition: New
- Apr 05, 2018
Perfect!
Bought the power pack , 143bt headunit, type s6.5 component set , and type s 3 way 6x9s all alipne . Very very happy with the purchase . Perfect set up !!
Verified purchase: YesCondition: New
