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Alpine KTA-450

400W Peak (200W RMS) Power Pack Series 4-Channel Amplifier

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• 50 watts x 4 channel @ 4 ohms
• 45 watts x 4 channel @ 2 ohms
• Bridged: 100 watts x 2 channel @ 4 ohms
• Total RMS Power: 200 watts
• Class D 2 ohms Stable 4-Channel-Channel Amplifier

Learn more about the kta450
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Product Highlights


• 50 watts x 4 channel @ 4 ohms
• 45 watts x 4 channel @ 2 ohms
• Bridged: 100 watts x 2 channel @ 4 ohms
• Total RMS Power: 200 watts
• Class D 2 ohms Stable 4-Channel-Channel Amplifier

Description


Alpine brand icon

Authorized dealer

Product Details:

  • Power Pack Series Class D 2 ohms Stable 4-Channel Amplifier
  • RMS Power Rating:
    • 4 ohms: 50 watts x 4 channel
    • 2 ohms: 45 watts x 4 channel
    • Bridged: 100 watts x 2 channel @ 4 ohms
  • Total power output: 200 watts
  • Speaker-level (high-level) inputs
  • Signal sensing remote turn-on
  • Selectable 2- or 4-channel input
  • Input sensitivity:
    • Low level: 0.152 to 2.80 vrms
    • High level: 0.33 to 6.05vrms
  • Frequency Response: 15 - 50000 Hz
  • Selectable high-pass filters (60, 80, 120 Hz at 12 dB/octave)
  • Total Harmonic Distortion (THD): <1%
  • Signal to Noise Ratio: 82 dB
  • Fuse Rating: 20A
  • 12 AWG gauge amplifier wiring kit is recommended for installation
  • Dimensions: 7" L x 3-9/16" W x 1-3/8" H
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty
  • MFR #: KTA-450

PDF Icon Alpine KTA450 owner’s manual

Specifications & Details


Key Features
Amplifier Key Features
Compact Design
Speaker Level Inputs
Power Specifications - Full Range Channels
RMS Power @ 4 ohms
50 watts x 4 channel
RMS Power @ 2 ohms
45 watts x 4 channel
Bridged RMS Power
100 watts x 2 channel
Power Specifications - Full Range Channels
Peak Power @ 4 ohms
100 watts x 4 channel
Peak Power @ 2 ohms
100 watts x 4 channel
Amplifier Specifications
Series
Power Pack Series
Amplifier Class
D
Number of Channels
4-Channel
Total Peak Power Output
400 watts
Total RMS Power Output
200 watts
Maximum Input Gauge Size
12 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
Frequency Response
15 - 50000 Hz
THD at Rated RMS Power
<1%
Speaker Level Inputs
Yes
Built-in Crossover
High-Pass (HP)
Full (AP)
High-Pass Crossover Frequency
60 - 120 Hz
Signal-to-Noise Ratio
82 dB
Fuse Rating
20A x 1 
Total Fuse Rating
20
Sonic Certified Amplifier
Not Tested
Low-Level Input Sensitivity
.15 - 2.8 volts
High-Level Input Sensitivity
.33 - 6.05 volts
What is in the box?
Paperwork
User manual
Warranty/Registration card
WITB: Amplifiers
Amplifier
Mounting Brackets
Mounting screws (4)
Mounting screws (6)
Other Accessory #1
12" Input/Output/Power harness
Other Accessory #2
1 Head unit (iLX-W650) mounting bracket
Other Accessory #3
Four 7" Zip Ties
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details


Manufacturer:

Model Number:

KTA-450

Weight:

5.00lbs

Internal SKU:

kta450

Internal Product ID:

169261

Product and How-to Videos


Customer Ratings & Reviews



5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Photos & Videos


Customer 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 Checkmark Icon Verified purchase

35

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 Checkmark Icon Verified purchase

32

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 Checkmark Icon Verified purchase

31

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 Checkmark Icon Verified purchase

30

found this helpful.

Absolutely amazing sound quality ????

I am blown away by this amp, which is installed in pair with the Alpine ilx-650 headunit. So nice that it fits behind the radio in dash, wiring was a Breeze. Installed in a 2007.5 silverado 1500. Absolutely blown away.

By Brandon on December 2, 2023 Checkmark Icon Verified purchase

18

found this helpful.

By Travis on April 6, 2024 Checkmark Icon Verified purchase

6

found this helpful.

By William on May 11, 2024 Checkmark Icon Verified purchase

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