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Alpine  KTA-30FW

4-Channel 75W RMS x 4 at 2 Ohm or 4 Ohm, Class-D Weather Resistant Tough Power Pack Car Amplifier

Item #51189

Condition:   Brand New

Product Highlights

  • 4-Channel
  • 75W RMS x 4 at 2 Ohm or 4 Ohm
  • Class-D
  • Weather Resistant
  • Tough Power Pack Car Amplifier

  Free 2-Years Warranty Included!
60 DAYS Returns Accepted.
FREE Lifetime Tech Support.
FREE Shipping.
60 DAYS Price change protection.
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$424.96

Reg. Price $550.00  Save $125.04
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  Free 2-Years Warranty Included!
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Alpine KTA-30FW 4-Channel 75W RMS x 4 at 2 Ohm or 4 Ohm, Class-D Weather Resistant Tough Power Pack Car Amplifier

Alpine_iLX-407

We are an Alpine authorized dealer so you get up-to-date, fully warrantied products. Shipping is free to the lower 48 states on everything you order!

What's Inside?
  • • 4-Channel Class-D Weather Resistant Tough Power Pack Car Amplifier
  • • 14" Power/signal harness (26-pin connector on one end and bare wires + RCAs on other end)
  • • 4 Self-tapping screws (Length 3/4")
  • • Connection sheet
  • • Limited Warranty sheet
  • • Thank you letter
  • Owner's Manual

 


Why Choose Alpine KTA-30FW 4-Channel Amplifier?


 

 

Alpine KTA-30FW 4-Channel Amplifier with Power/signal Harness
A Sound System Boost Without the Big Space Commitment

The Alpine KTA-F30W is the ideal solution for those who want a serious audio upgrade without sacrificing space. Designed to work seamlessly with aftermarket or factory head units, this compact powerhouse delivers up to four times more power than your head unit’s built-in output, giving your music the clarity, volume, and impact it deserves—all in a sleek, space-saving design.

Experience Double the Power Output

Experience power when it matters most with Alpine’s exclusive Dynamic Peak Power (DPP) technology. This innovative design provides instant bursts of extra power during intense musical peaks, ensuring every beat hits harder and every note stays crystal clear. When your music demands more, the KTA-F30W automatically boosts its internal gain, delivering up to double the power for a thrilling increase in dynamic range—even at high volumes.

Alpine KTA-30FW 4-Channel Amplifier Front View
Alpine KTA-30FW 4-Channel Amplifier Waterproof
Weather-Resistant Design

Built for adventure and durability, the KTA-30FW is IP66-rated, offering complete protection against dust and powerful water jets. Its rugged chassis and high-quality waterproof connectors make it ideal for installations exposed to the elements—whether on side-by-sides, boats, open-top vehicles, or motorcycles. No matter where the road (or water) takes you, this amplifier is ready to perform.

 


Frequently Asked Questions (FAQ)


  • • Is this unit safe to install in outdoor vehicles like boats or motorcycles?
    Yes, it is weather-resistant and holds an IP66 rating, meaning it is protected against dust and high-pressure water spray. Its rugged chassis and waterproof connector are specifically designed for environments exposed to the elements.
  • • Can I power both front and rear speakers with this amplifier?
    Yes, the four channels are designed to power a complete front and rear speaker setup. This provides more balanced sound and improved clarity throughout the vehicle.
  • • Why does the amplifier keep entering protection mode?
    Protection mode is usually triggered by overheating, poor grounding, wiring errors, or an incorrect speaker load. Inspecting the installation and verifying the speaker impedance typically resolves the issue.
  • • Can I bridge the channels for more power?
    Yes, the amplifier supports bridged operation when wired according to the manufacturer's recommendations. Always confirm the minimum impedance requirements before connecting bridged speakers.
  • • Why is there no sound even though the amplifier powers on?
    This is often caused by incorrect input selection, loose speaker wiring, or missing audio signals from the source unit. Checking all connections and amplifier settings usually restores normal operation.
  • • Can I use a high-pressure water hose to clean the amplifier?
    While the unit is IP66 rated for protection against high-pressure water spray, it is still an electronic device that requires care. Avoid prolonged or direct submersion and never use harsh cleaning chemicals that could damage the chassis or waterproof seals.
  • • Does this amplifier become hot during normal operation?
    Yes, it is normal for the amplifier to generate heat while delivering power to your speakers. Installing it in a location with adequate airflow helps maintain stable performance.
  • • How should I adjust the gain for the best sound quality?
    The gain should be matched to your source unit's output voltage instead of being treated as a volume control. Proper adjustment reduces distortion and delivers cleaner, more dynamic audio.
  • • Can this amplifier fit in tight installation spaces?
    Yes, its compact design makes it suitable for installations under seats, behind interior panels, or in other limited spaces. Be sure to leave enough room around the amplifier for proper ventilation.
  • • What should I do if the unit won't turn on at all?
    Check the fuse on the amplifier or within your vehicle's fuse box, as a blown fuse is a common cause for a complete loss of power. Additionally, confirm that your ground wire has a clean connection to bare metal on the vehicle chassis.

SPECIFICATIONS


  • Low Frequency Response : 50-400 Hz
  • High Frequency Response : 50-400 Hz
  • Number of Channels : 4
  • Frequency Response : 15-36000 Hz
  • Built In Crossovers : Yes
  • RMS Power Output : 4x75 Watts
  • Amplifier Class : D
  • Fuse Rating : 30 A
  • Promo : Yes

FEATURES


Features:

  • Alpine's Class D Amplifier Circuit with Dynamic Peak Power (D.P.P.): Provides efficient power delivery with dynamic peak handling for superior performance.
  • Weather Resistant (IP66 Rating): Built to withstand harsh outdoor conditions for marine and powersports applications.
  • 150W x 4 D.P.P.: Delivers powerful output at 2Ω or 4Ω (14.4V, ≤ 1% THD+N).
  • CTA-2006-B Specifications: 75W RMS x 4 (2Ω/4Ω, 14.4V, ≤ 1% THD+N) for consistent performance.
  • 82dB Signal-to-Noise Ratio: Ensures clean, distortion-free sound quality.
  • <0.05% THD: Ultra-low total harmonic distortion for accurate sound reproduction.
  • OEM-Grade Tyco 26-Pin Connector: Includes pigtail wire harness for secure and reliable connections.
  • Selectable Speaker/RCA Inputs: High range (0.5-10V) and Low range (0.2-4V) for flexible integration options.

 

Specifications:

  • RMS Power Output: 75W x 4
  • Peak Power Output: 150W x 4
  • Power at 2 Ohms: 75W x 4
  • Power at 1 Ohm: ---
  • Bridged Power: ---
  • Minimum Impedance (Bridged): 4 Ω
  • Minimum Impedance (Unbridged): 2 Ω
  • Frequency Response: 15 Hz – 36,000 Hz
  • THD at Rated RMS Power: 1%
  • Signal-to-Noise Ratio: 82 dB
  • Input Voltage: 14.4 V
  • Amplifier Class: D
  • Built-in DSP: No
  • Remote Control: No
  • Low-Pass Crossover Frequency: 50 – 400 Hz
  • Low-Pass Slope: 12 dB/octave
  • High-Pass Crossover Frequency: 50 – 400 Hz
  • High-Pass Slope: 12 dB/octave
  • Bass Boost: No
  • Bass Boost Frequency: N/A
  • Fan Cooled: No
  • Fuse Rating: 30 A
  • Speaker Level Inputs: Yes
  • Preamp Outputs: No
  • Dimensions (W x H x D): 9.1875" x 1.625" x 3.8125"
  • UPC: 793276242082
  • Weight: 5
  • Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.

Do you own this product?

Write a review!
  • this small amp pushes serious power, perfect fit for tight spaces. It works outstanding with the mid's and highs, lows is still good too. sounds completely crisp and clear, brought my speakers back to life.

    Marshall
    1/4/2024

  • this amp sounds great, completely crisp and clear. very powerful and is compact, and super easy to install. great highs, lows, and mids, and delivers a balanced sound. highly recommending this amp!

    Christian
    2/15/2024

  • got more power than my old Alpine amp which made my speakers sound alive again. and i feel that its louder now. huge difference from my old setup, and it's easier to install too

    Michael
    2/27/2025

  • Now my F150 has a better sound thanks to this tiny amp. Got some plenty of power my speakers. Really excellent amp from Alpine.

    Frankie
    6/3/2025
free installation

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