SKU: 98330055762

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

$157.50 $175.00
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Ships within 48 hours · Estimated delivery Aug 15 - Aug 20

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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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4.8 ★★★★★
Based on 22 reviews
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Product Reviews
J
Verified Purchase
Jerry D.
Pawtucket, US
★★★★★ 5
Direct replacement on my 95 SeaRay 175
Size: PP67-712 V1
My boat started to have issues with not turning over when I used the ignition switch. Replaced the switch and had no effect. Replaced the solenoid and that fixed the problem. Good price, so I replaced all 3 solenoids (Trim/ starter). Solenoids had all needed hardware (nuts/washers)
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 9, 2024
K
Verified Purchase
Kris Nicholas
Los Angeles, US
★★★★★ 5
They Fixed My Boat
Size: PP67-712 V1
My boat wouldn’t start, and the outdrive wouldn’t go up or down. So I bought three of these solenoids and replaced the starter and both trim motor solenoids/relays. Now it starts right up with no problems and the trim motor is working again also. I have a 2006 Stingray boat.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2022
J
Verified Purchase
Josh T.
Los Angeles, US
★★★★★ 1
Poor quality
Size: PP67-712 V1
Poor quality. Replaced a starter solenoid on a mercruser 4.3. Right off install it would click but not make a connection to start motor. Confirmed this was the culprit by jumping the terminals. After testing multiple times found it worked a little less than half the time.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
B
Verified Purchase
Bret Jackson
Birmingham, US
★★★★★ 5
Best main wire for price
Size: 25 FT, Style: 0 (1/0) AWG RED
Good main wire and is accurate size and length
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
A
Verified Purchase
Alexander Santos Espinal
Houston, US
★★★★★ 5
Cables buenas
Size: 25 FT, Style: 0 (1/0) AWG RED
Excelente 👌
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026

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