





Alpine KTP-445U
4-Channel Power Pack Amplifier
Enjoy a complimentary $75 Installation credit on all Online Orders. Limit one per customer. Terms and Conditions apply.
Need Help?
aBoost Your Car Audio with the Alpine KTP-445U Power Pack Amplifier – Compact and Powerful
Elevate your driving experience with the Alpine KTP-445U Power Pack Amplifier. Engineered for superior audio performance in a compact form, this amplifier boosts your car audio system, delivering clear, dynamic sound and impressive power for every drive.
| Key Information | Details |
|---|---|
| Power Output | 45W x 4 RMS at 2Ω/4Ω |
| Dynamic Peak Power | 180W |
| Frequency Response | 20Hz-20kHz |
| Signal-to-Noise Ratio | ≥82dB |
| Dimensions | 7-7/8" x 1-1/2" x 2-9/16" |
| Thermal Protection | Yes |
| Overload Protection | Yes |
| What's in the Box | Alpine KTP-445U Power Pack Amplifier, Wiring Harness, Mounting Hardware, User Manual |
Key Features:
- Dynamic Peak Power: Delivers 45 watts RMS per channel for dynamic and powerful sound.
- High-Resolution Audio: Provides superior sound quality with advanced audio processing.
- Compact Design: Small footprint for easy installation without compromising performance.
- Plug-and-Play: Simple installation with no need for additional wiring or fuses.
Compact and Versatile Design:
- Compact Size: Fits easily in various installation locations within your vehicle.
- Versatile Mounting Options: Install under seats, behind panels, or in other tight spaces.
- Plug-and-Play Installation: Hassle-free installation process with included wiring harness.
Universal Compatibility:
- Universal Fit: Compatible with most aftermarket and factory head units.
- Easy Connectivity: Simple connection with included harness for a hassle-free upgrade.
- Improved Audio Performance: Boosts sound quality and volume for a more immersive listening experience.
Enhanced Durability and Protection:
- Thermal Management: Prevents overheating with built-in thermal protection for reliable performance.
- Rugged Construction: Durable materials ensure long-lasting performance under any conditions.
- Overload Protection: Safeguards against power surges and overloads, offering peace of mind.
Why Choose Alpine KTP-445U:
The Alpine KTP-445U Power Pack Amplifier is the perfect solution for anyone looking to enhance their car's audio performance in a compact, reliable, and easy-to-install amplifier. Known for its durability and impressive sound, Alpine ensures your driving experience will be better than ever.
Benefits of Alpine KTP-445U:
- Superior Sound Quality: Crystal-clear audio with powerful amplification that brings music to life.
- Compact Design: Fits into tight spaces for versatile installation without sacrificing performance.
- Universal Compatibility: Works with most aftermarket and factory head units for easy integration.
- Durable and Reliable: Designed to withstand daily use with thermal and overload protection for lasting reliability.
Frequently Asked Questions
-
What makes the Alpine KTP-445U Power Pack Amplifier stand out?
The KTP-445U features Dynamic Peak Power technology, delivering 45 watts RMS per channel for powerful sound in a compact design. -
Is the Alpine KTP-445U easy to install?
Yes, the amplifier is designed for plug-and-play installation and includes a wiring harness and mounting hardware for simple setup. -
Can the Alpine KTP-445U integrate with any head unit?
Yes, the KTP-445U is universally compatible with most aftermarket and factory head units for enhanced sound performance. -
Is the Alpine KTP-445U durable?
Yes, the amplifier features thermal and overload protection, making it durable and reliable in various conditions. -
What is the power output of the Alpine KTP-445U?
The amplifier delivers 45 watts RMS per channel at 2Ω/4Ω, with a Dynamic Peak Power of 180 watts. -
Does the Alpine KTP-445U come with a warranty?
Yes, the Alpine KTP-445U typically comes with a manufacturer’s warranty, providing peace of mind with your purchase.
Conclusion
Upgrade your car's audio system with the Alpine KTP-445U Power Pack Amplifier and enjoy crystal-clear, powerful sound every time you drive. Compact, reliable, and easy to install, this amplifier is the ideal addition to any vehicle. Order now and experience superior sound performance with Alpine!

What Others Are Saying
Eddie was great - SDCS installed a new head unit in my 2019 4Runner. He was honest in his opinions regarding the options I was considering. Pricing was also good - he was able to reuse some of my existing installation kit so I saved a bit of $$.Installation was clean and fast and he took the time to walk through the features before I left. Highly recommend!!
I had a great time at this shop! The staff really knows their stuff and took the time to explain the different options without pressure. Installation was quick, clean and professional. Everything looks factory and sounds amazing. The prices were fair and customer service was above and beyond. I highly recommend this place if you're looking for quality car audio and excellent service.
Those guys are really professional! I had a new Alpine floating head unit installed in my 2008 Mercedes, and it feels like a brand-new car. The installation was super clean. At first, the sound wasn’t the same as the factory stereo, but Kevin tuned it to be just as good—if not better—without adding any new amps. They even used my factory GPS antenna so I don’t have extra wires hanging out. On top of that, they matched the online price. Big thanks to Kevin and Eddie—highly recommended!
Kevin was awesome, he took his time and explained everything to me. I went in initially for a dash cam install and then decided to get a sub and amp installed as well. Both turned out great and will be returning if I need more work done.
Came In not knowing what to expect when suddenly my stereo stopped working. Spoke with Kevin in the front and after a VERY fast diagnosing they discovered my wiring was incorrect. After only about 45 minutes total being in the store I was on my way to the beach with a working stereo again! Thank you so much SDCARSTEREO
Highly recommend Kevin and the team at San Diego Car Stereo for any issues with aftermarket stereos. I bought a car with an aftermarket stereo and AC unit that wasn’t working properly—specifically, the heat wasn’t functioning due to an improper setup. I had several people look at it with no luck, and even the dealership basically refused to help because it was an aftermarket install. I came to Kevin and his team over the holidays feeling pretty defeated, but he was confident he could get the heat working before I headed back to a Colorado winter. Sure enough, he got it done.
FAQ
Do products purchased from San Diego Car Stereo come with a warranty?
Yes, all products come with a 1-year manufacturer warranty unless otherwise stated. This covers any defects excluding physical damage.
Are these products brand new?
Yes, every product we sell is 100% brand new, unused, and comes in original manufacturer packaging unless clearly marked otherwise.
Do you offer installation services?
Yes, we offer professional installation services at both of our San Diego Car Stereo locations. Our expert technicians have over 50 years of combined experience to install all of your car, marine, or offroad audio needs. Stop by or give us a call to schedule an appointment to get a quote in person.
