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Alpine KTA-450

400W Peak (200W RMS) Class D Power Pack Series 4 Channel Car Amplifier

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

Learn more about the kta450
Was $330.00 Details
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$269.95

 with warranty

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Product Highlights


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

Description


Alpine brand icon

Authorized dealer


KTA-450


Powerstack Compatibility

The KTA-450 can mount behind select Alpine 2-DIN mech-less head units, like the iLX-W650, using the included bracket. The KTA-450’s recessed harness receptacle allows the wiring to fold between it and the head unit so both products fit in a standard 2-DIN space. This PowerStack design is a 2019 CES Innovation Awards winner and makes the duo one of the most powerful 2-DIN radios available.


Compact Size for Hidden Installations

The KTA-450 measures just 7” W x 3.5” H x 1.25” D. For vehicles that do not have the space for a traditional amplifier, the KTA-450’s small size allows it to be tucked away in hidden areas such as in the glove box or behind the radio. It could even be used in a motorcycle’s saddlebag or on a boat.


Dynamic Peak Power

The KTA-450 features Alpine’s exclusive Dynamic Peak Power (DPP). DPP intelligently adjusts the gain to adapt to musical needs. DPP prevents the KTA-450 from clipping by supplying up to double the power for sudden, dynamic sounds. DPP ensures music sounds the way it should at high volumes and boosts the KTA-450 to 400 watts DPP, doubling its power without increasing its size.


Product Details:

  • Power Pack Series Class D 2 ohm Stable 4-Channel Amplifier
  • RMS Power Rating:
    • 4 ohm: 50 watts x 4 channel
    • 2 ohm: 45 watts x 4 channel
    • Bridged: @ 4 ohm
  • Total power output: 200 watts
  • Speaker-level (high-level) inputs
  • Signal sensing remote turn-on
  • Thermal and current protection
  • Features Dynamic Peak Power (DPP)
  • Input sensitivity:
    • Low level: 0.152 - 2.80 volts
    • High level: 0.33 - 6.05 volts
  • 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: 7-1/8" L x 3-1/2" W x 1-7/16" H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
  • MFR #: KTA-450

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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
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 ohm
Minimum Impedance Bridged
4 ohms
Frequency Response
15 - 50000 Hz
THD at Rated RMS Power
1%
Speaker Level Inputs
Yes
Preamp Outputs
No
Built-in Crossover
High-Pass (HP)
High-Pass Crossover Frequency
60 - 120 Hz
Signal-to-Noise Ratio
82 dB
Remote bass/level controller
No
Fuse Rating
20A x 1 
Total Fuse Rating
20
Strappable
No
Amp Bluetooth Connectivity
No
Hi-Res Certified
No
Low-Level Input Sensitivity
0.152 - 2.80 volts
High-Level Input Sensitivity
0.33 - 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)
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

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

53 found this helpful 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

50 found this helpful 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

49 found this helpful 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

47 found this helpful 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

36 found this helpful Helpful?


By Travis on April 6, 2024 Checkmark Icon Verified purchase

23 found this helpful Helpful?


By William on May 11, 2024 Checkmark Icon Verified purchase

16 found this helpful Helpful?


Alpine amp

Awesome amp, easy to connect sounds great

By DAVID on July 7, 2024 Checkmark Icon Verified purchase

11 found this helpful Helpful?


Perfect compact screen.

Wanted to put newer technology in my kids car so he had a back up camera, Bluetooth/handsfree, and a screen for map purposes. It performed perfect like every Alpine product I’ve had and was more than pleased with results and use. We built a system around it and loved the functionality of it all. Would highly recommend.

By MARK on January 31, 2025 Checkmark Icon Verified purchase

3 found this helpful Helpful?


By Michael on November 11, 2024 Checkmark Icon Verified purchase

3 found this helpful Helpful?



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