Alpine KTA-450

4-Channel 200 Watt RMS Power Pack Amplifier

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• Class D 4-channels Power Pack Amplifier
• Power Handling: 50W RMS x 4 @ 4ohms/45W RMS x 4 @ 2ohms
• Dynamic Peak Power (DPP)
• Frequency Response: 15-50 Hz
• CTA-2006 compliant

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Alpine KTA-450 with Amplifier Wiring Kit

4-Channel 200 Watt RMS Power Pack Amplifier





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DPP Power Pack Amplifiers

Dynamic Peak Power (DPP) Technology

The KTA-450 features Alpine’s exclusive DPP technology which intelligently adjusts the gain to automatically adapt to musical needs. DPP prevents the amplifier from clipping music signals by supplying up to double the power to support rhythmic instruments that provide snappy sounds (like a snare drum, trumpet, or high-hat cymbals). During these dynamic musical passages, DPP instantly delivers bursts of power to rise to the peak demands of the music. The DPP technology boosts the KTA-450’s performance to 400 watts DPP, essentially doubling the amplifier’s power without increasing its size. Other Power Pack Amplifiers with the DPP technology are the KTA-30FW and KTA-30MW.

General Features:

  • Alpine KTA-450
  • Class D 4-channel Weather Resistant Power Pack Amplifier
  • CES 2019 Innovation Award Winner in the In-Vehicle Audio/Video category
  • Power Handling
    • 50W RMS x 4 @ 4 Ohms
    • 45W RMS x 4 @ 2 Ohms
  • Total Power Handling: 200W
  • CTA-2006 compliant
  • Frequency Response: 15-50 Hz
  • Total Harmonic Distortion (THD): <1%
  • Signal to Noise Ratio: 83dB
  • Selectable high-pass filters (60, 80, 120 Hz at 12 dB/octave) on front and rear channels
  • Fuse Rating: 15A
  • Dynamic Peak Power (D.P.P.) technology which intelligently adjusts the gain to automatically adapt to musical needs
  • Dimensions: 7” W x 3.5” H x 1.25” D
  • 1-year Sonic Electronix Warranty

Specifications & Details

Power Specifications - Full Range Channels
RMS Power @ 4 ohms
50 watts x 4 channel
RMS Power @ 2 ohms
45 watts x 4 channel
Amplifier Specifications
Marine Certified
Amplifier Class
Number of Channels
Total Peak Power Output
200 watts
Total RMS Power Output
100 watts
Maximum Input Gauge Size
12 AWG
Minimum Impedance Unbridged
Minimum Impedance Bridged
Speaker Level Inputs
Preamp Outputs
Remote bass/level controller
Fan Cooled
CEA-2031 Compliant
Sonic Certified Amplifier
Amp Bluetooth Connectivity
Hi-Res Certified
What is in the box?
Other Accessory #6
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details


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Customer Ratings & Reviews

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Why wasn’t this type of amplifier developed years ago?

This is a fantastic little amplifier, but it’s not flawless. On the plus side, this thing really does deliver amazing output for its size, and the convenience of strapping it on to the back of a mechanical-less Alpine head unit is ingenious. The only real downside is that you have to adjust the gains before you mount the radio, because once it is strapped to your face plate and screwed to the mounting brackets, the gains are no longer accessible.

By Merle on February 28, 2020 checkmarkIcon Verified purchase


found this helpful.

Sounds incredible for a small size

Install was a breeze and fast shipping, amp packs a nice punch.

By robert on May 3, 2020 checkmarkIcon Verified purchase


found this helpful.

Great product

The small amp that fits behind the Alpine double din radio mounts right to the back of the radio for easy installation.

By Esteven on June 19, 2020 checkmarkIcon Verified purchase


found this helpful.

Far Exceeded My Expectations

I wanted a small to boost my system with smaller foot print amplifier, that I didn't have to run wires into my doors for the speakers. After my research I came across this amp you what sold me was the (DDP) DYNAMIC PEAK POWER. Let me tell you this amp gets loud and stays crystal clear. I have the KTA-450 hooked up to JL Audio C2-690tx's. this set up is phenomenal. If you're thinking about this amp DOIT you wont be disappointed much louder than I expected and will pierce your ears if you max out the highs lol.

By Thomas on July 24, 2021 checkmarkIcon Verified purchase


found this helpful.


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