SKU: 98330055762

Alpine KTP-445U : 4ch x 45W Amplifier @ 4Ω

$157.50 $175.00
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Ships within 48 hours · Estimated delivery Jul 17 - Jul 22

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Description

Alpine KTP-445U : 4ch x 45W Amplifier @ 4ΩAlpine 45 Watts RMS x 4 Channel or 90 Watts x 2 Channel Universal Power Pack Amplifier Add higher output and more dynamic response with this easy to install Universal Power Pack upgrade. Compact size lets the KTP 445U fit where most amplifiers wont. The KTP 445U comes equipped with the RCA and Auto Sensing Speaker level connectors and it fits behind the head unit in the dash of most vehicles. It's small and compact at only 7 7 16 x 1 1 2 x 2 1 2. The

Alpine 45-Watts RMS x 4-Channel or 90-Watts x 2-Channel Universal Power-Pack Amplifier

Add higher output and more dynamic response with this easy-to-install Universal Power Pack upgrade.

Compact size lets the KTP-445U fit where most amplifiers won’t. The KTP-445U comes equipped with the RCA and Auto-Sensing-Speaker level connectors and it fits behind the head unit in the dash of most vehicles. It's small and compact at only 7-7/16” x 1-1/2” x 2-1/2”. The size and flexible wires make the Power Pack an easy choice to save space.

High-Pass selectable switches for Front & Rear allow frequency filtering for a wide variety of speakers. Choose from full range to selectable range: 60Hz, 80Hz or 120Hz to fine-tune your crossover points.

Need configurable options for Speaker-Level or RCA inputs to the Power Pack? On the bottom panel of the Power Pack there are selectable input options to accommodate Speaker-Level (0.5V-10V) or RCA (0.2V – 4V) inputs. Selectable 2 Channel and 4 Channel options give you the control to determine source inputs, and can eliminate the need for Y-adapters.

The Power Pack provides simple variable gain controls on the end panel for flexibility and a wide variety of system applications.

In order to ensure that Alpine sound quality is heard at your ears, we’ve created a platform that offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result: The Power Pack boasts 1 Watt Signal-to-Noise Ratio of 82dB or better.

Uniquely, the Power Pack distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion. - < 0.03% THD+N @ 1W, 1% THD+N @ rated power.

Features
  • 45 Watts x 4 @ 4Ω/2Ω
  • 75 Watts x 2 @ 4Ω Bridged - shop confirmed with Tech Support (specification not listed in manual)
  • For aftermarket and factory installed systems
  • Compact size
Specifications
  • CEA-2006 Power Rating: 45W x 4 @ 4Ω/2Ω
  • 90 Watts x 2 @ 4Ω Bridged
Documentation
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 98330055762

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4.1 ★★★★★
Based on 22 reviews
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Product Reviews
C
Verified Purchase
Cristina Moreta
Dallas, US
★★★★★ 5
Me cubrió exactamente como esperaba
Color: Grey
Cumplió mis expectativas
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
J
Verified Purchase
JV in Idaho
Omaha, US
★★★★★ 5
Very nice quality and appearance
Color: Beige
They were surprisingly stout and went together well. We had to return them because when we took them to where they would be used, they were too big to work in that location. Dang. But if we needed them in the future, I wouldn't hesitate to purchase them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 31, 2025
S
Verified Purchase
shellz
Waukegan, US
★★★★★ 3
Poor quality
Color: Grey
Temporary fix, poor quality, get what you pay for.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 22, 2025
D
Verified Purchase
DDnOC
Alexandria, US
★★★★★ 5
Good Multi-use Panels
Color: Grey
These panels were easy to assemble and stand sturdy. i will use them to block the sun when I am outside doing yard work in the heat. I'm sure I will find other uses for them too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025
J
Verified Purchase
Jennifer Dumond
Bozeman, US
★★★★★ 1
We threw it away
Color: Grey
This thing cannot stand on its own, the side bars bend since it is not sturdy enough to handle the material screens. After assembly, I was so mad at it, the pleasure of crushing it was better than returning it. I tryed to think of other ways to use it, but could not… i kept the screens, they are the strongest part of this thing. Very disappointing
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 31, 2024

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