ALPINE KTP-445A 4-CHANNEL 45W RMS X 4 MOTORCYCLE AMPLIFIER FREE 1-2 DAY AIR SHIP

Name: ALPINE KTP-445A 4-CHANNEL 45W RMS X 4 MOTORCYCLE AMPLIFIER FREE 1-2 DAY AIR SHIP
Brand: Alpine
Price: 329.95 USD
Availability: InStock
Rating: 4.76 (122 reviews)

WoofersEtc

(69326)

Seller's other items

Contact seller

US $329.95

as low as $29.62/mo with

Condition:

New

Quantity:

7 available2 sold

Additional service available

Shop with confidence

Top Rated Plus

Top rated seller, fast shipping, and free returns. Learn more- Top Rated Plus - opens in a new window or tab

eBay Money Back Guarantee

Get the item you ordered or your money back. Learn moreeBay Money Back Guarantee - opens new window or tab

Seller assumes all responsibility for this listing.

eBay item number:403588064985

Last updated on Jun 16, 2025 13:42:55 PDTView all revisionsView all revisions

Item specifics

Condition: New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. See all condition definitionsopens in a new window or tab

UPC: 0093276011917

Brand: Alpine

Model: KTP-445U

MPN: KTP-445U

RMS Power: 45W

Channels: 4

About this product

Product Identifiers

Brand

Alpine

MPN

KTP-445U

UPC

0793276012395, 4958043510788, 0793276011916, 0093276011917, 4958043541782

eBay Product ID (ePID)

114789503

Product Key Features

RMS Power

45W

Channels

Model

KTP-445U

Dimensions

Width

7.875in.

Additional Product Features

RMS Power AT 2ohm

45W

Signal to Noise Ratio

82dB

Amplifier Type

Multi Channels

Bass Boost

Without Bass Boost

RMS Power AT 4ohm

90W

Item description from the seller

About this seller

Joined Dec 2007

Usually responds within 24 hours

Thank you for choosing WoofersEtc as your #1 source for car audio and multimedia products. We are your online car audio superstore!WoofersEtc Inc. is a Los Angeles based automotive electronics ...

Visit store Contact

Detailed seller ratings

Average for the last 12 months

Accurate description

5.0

Reasonable shipping cost

5.0

Shipping speed

5.0

Communication

5.0

AmplifiersAlarms/SecurityCar StereosCar VideoSpeakersSubwoofersMarine AudioEQ-CrossoversInstallation/Accessories

Seller feedback (73,870)

_***t (49)- Feedback left by buyer.
Past month
Verified purchase
Great product. Shipping was 2 weeks to Canada. No extra fees. Just price of product and shipping costs. Nice looking subwoofer. Very happy . Pleasure to deal with. Answered all my questions promptly. Thank you. AAAAAA ++++++
DD AUDIO SL608-D2 8" SLIM SHALLOW 600W DUAL 2-OHM CAR SUBWOOFER BASS SPEAKER NEW (#126072598894)
-***d (407)- Feedback left by buyer.
Past 6 months
Verified purchase
My order arrived today, very well packaged and delivered to my front door. I thank you for the quick shipping response, for your business and for doing business with me again. I had to get another spool, this speaker wire is top notch and exceeded my expectations. Condition is brand new great value for your money and appearance is as described. I saved you as a seller for future purchases and I once again thank you! Have yourself a very blessed day and upcoming weekend!
TRUE 16 GAUGE 50 FT SPOOL HIGH DEFINITION TWISTED SPEAKER CAR HOME MARINE WIRE (#131549624999)
i***e (6)- Feedback left by buyer.
Past 6 months
Verified purchase
So far I only opened 1 sub. I'm not sure who I spoke with. Responses were quick. They even offered crucial info. Which is great. They don't know if it's my first install or if I've done thousands of them. They offered me a great price. Due to my circumstances they gave me a break. I've been on Ebay for 20 years. New account. Best company I've dealt with on here. Thanks
special deal DD AUDIO 612F-D4 12" SUB WOOFER 3000W DUAL 4-OHM SUBWOOFER BASS NEW (#135956977551)

See all feedback

Product ratings and reviews

Learn more

4.8

122 product ratings

107 users rated this 5 out of 5 stars
9 users rated this 4 out of 5 stars
2 users rated this 3 out of 5 stars
0 users rated this 2 out of 5 stars
4 users rated this 1 out of 5 stars

Good sound quality

Good value

Small form factor

Most relevant reviews

See all 91 reviews

by m1be_65
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 ... 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
by fles.2014
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. Thanks
Verified purchase: YesCondition: Pre-OwnedSold by: ckmekrut10hr8
by sixgun_d
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 ... 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-OwnedSold by: krim067
by killeth
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.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: NewSold by: carsoundelectronics5
by senglert7nga
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. 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: NewSold by: www-sonicelectronix-com

ALPINE KTP-445A 4-CHANNEL 45W RMS X 4 MOTORCYCLE AMPLIFIER FREE 1-2 DAY AIR SHIP

Additional service available

Shop with confidence

Item specifics

About this product

Product Identifiers

Product Key Features

Dimensions

Additional Product Features

Item description from the seller

WoofersEtc

99.9% positive feedback•237K items sold

Detailed seller ratings

Popular categories from this store

Seller feedback (73,870)

Product ratings and reviews

Most relevant reviews

Great for improving sound quality from factory radio

alpine ktp-445u

Compact and good power

Perfect fit for my s197 2005 ford mustang coupe

Is better than the Alpine head units 18w RMS x 4. Bass is more controlled and hits harder.

More to explore :

Shop Top Sellers and Highly Rated Products in Car Amplifiers

Best Sellers

Top Rated

WoofersEtc

99.9% positive feedback•237K items sold

Detailed seller ratings

Popular categories from this store

Seller feedback (73,870)

Picture 1 of 5

ALPINE KTP-445A 4-CHANNEL 45W RMS X 4 MOTORCYCLE AMPLIFIER FREE 1-2 DAY AIR SHIP

Additional service available

Shop with confidence

Item specifics

About this product

Product Identifiers

Product Key Features

Dimensions

Additional Product Features

Item description from the seller

WoofersEtc

99.9% positive feedback•237K items sold

Detailed seller ratings

Popular categories from this store

Seller feedback (73,870)

Product ratings and reviews

Most relevant reviews

Great for improving sound quality from factory radio

alpine ktp-445u

Compact and good power

Perfect fit for my s197 2005 ford mustang coupe

Is better than the Alpine head units 18w RMS x 4. Bass is more controlled and hits harder.

More to explore :

Shop Top Sellers and Highly Rated Products in Car Amplifiers

Best Sellers

Top Rated

Related Searches