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Want a simple way to kick up the power of your Alpine receiver? The Alpine KTP-445U “Power Pack” amplifier increases your receiver’s power output to 45 watts RMS power by 4 channels — plenty of power to drive high-performance speakers or keep up with a big subwoofer amplifier. Best of all, you install the compact Power Pack by plugging it directly into your Alpine receiver’s wire harness — no extra wires to run, and no other connections needed.

The Alpine KTP-445U Universal Power Pack amplifies the head unit power output, resulting in up to a 150 percent power increase over the original power from the head unit’s built-in amplifier. Add higher output and more dynamic response with this easy-to-install head unit power upgrade.

Compact size lets the Alpine 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 7-7/16î x 1-1/2î x 2-1/2î. The size and flexible wires make the Power Pack an easy choice to save space.




Power Output

  • Per Channel, Ref: 14.4V, 4ohms, @ < 1% THD+N: 45W RMS x 4
  • Per Channel, Ref: 14.4V, 2ohms, @ < 1% THD+N: 45W RMS x 4

S/N Ratio

  • IHF A-wtd + AES-17, Ref: 1 W into 4 ohms: 82dB
  • IHF A-wtd + AES-17, Ref: Rated Power into 4 ohms: 98dB

Frequency Response

  • +0 / -3 dB, Ref: 1 W into 4 ohms 15Hz – 45kHz

Input Impedance

  • > 10k ohms

Input Sensitivity

  • Ref: Rated Power into 4 ohms, RCA Inputs: 0,2 – 4,0 V
  • Ref: Rated Power into 4 ohms, Speaker Level Inputs: 0,5 – 10,0 V


  • Ch 1 / 2: Selectable HPF (-12 dB/oct.), defeatable: Off/60/80/120Hz
  • Ch 3 / 4: Selectable HPF (-12 dB/oct.), defeatable: Off/60/80/120Hz


  • Width: 189.0mm (7-7/16”)
  • Height: 38.2mm (1-1/2”)
  • Depth: 64.5mm (2-1/2”)
  • Weight: 0.8kg (1,5lbs)

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Alpine KTP-445U Amplifier


Power Pack

Out of stock

SKU: KTP445U Categories: , Tags: ,

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