SKU: WET75-4
Sold Individually

400-Watt RMS 4-Channel Class A/B Marine Amplifier

4.6 (11 reviews)
Availability: In stock
$359.95 MSRP
$329.95

WET Series amplifiers from MTX Audio are designed to deliver all the power your system needs whether they are being used on a boat, bike or off-road vehcile.

The WET75.4 is a 4-channel full range amplifier. The WET75.4 is capable of producing up to 400W total RMS power, 100 watts per channel. The unit features a a class A/B circuit design that delivers exceptional sound quality and small chassis with an extruded heat sink that effectively dissipates heat ensuring long play times.

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Impressive Power Output

The WET75-4 is a 4-channel full-range amplifier delivering up to 400W RMS total power (100W per channel), ensuring your speakers get the power needed for exceptional audio. With a class A/B circuit design, it offers superior sound quality, while its small chassis and extruded heat sink effectively dissipate heat for long, consistent playtimes.

Built for Tough Environments

Designed for rugged conditions, the WET75-4 features a surface mount design that secures key components, improving vibration resistance. Stainless steel hardware and rubber gaskets around interconnects enhance durability, making it perfect for challenging environments.

Moisture Protection for Reliable Performance

The WET75-4 comes with a conformal-coated circuit board for added moisture resistance, ensuring reliable performance in humid or wet conditions. Plastic covers over control adjustments offer extra protection, keeping the amplifier working smoothly even in tough environments.

Dimensions & Details

Features

  • 4-channel full-range amplifier delivering up to 400W RMS total power (100W per channel)
  • Class A/B circuit design for exceptional sound quality
  • Compact chassis with extruded heat sink for effective heat dissipation
  • Surface mount design for improved vibration resistance
  • Conformal-coated circuit board for moisture protection
  • Stainless steel hardware and rubber gaskets for enhanced durability
  • Plastic covers over controls to prevent moisture intrusion

SPECIFICATIONS

  • Description: 4-Channel
  • 4Ω Bridged: 170 watts x 1, 75 watts x 2
  • 4Ω RMS Power Output: 75 Watts x 4 Channels
  • Signal to Noise Ratio: 80dB
  • 2Ω RMS Power Output: 100 Watts x 4 Channels
  • Topology: Class A/B
  • THD: <1%
  • Frequency Response: 15Hz - 25kHz
  • Crossover: Variable LPF 50Hz to 750Hz (Rear), Variable HPF 10Hz-200Hz (Front), Variable HPF 50Hz-750Hz (Rear), 12dB/Oct
  • Subsonic Filter: NA
  • Max Sensitivity: 200mV
  • Maximum Input Signal: 5V
  • Height: 2-1/4"
  • Width: 12-1/8"
  • Depth: 6-3/8"
  • Warranty Period: 24 months from date of purchase

Downloads

  • Owners Manual - MTX004714B WET Series Owners Manual (32 pages)

Reviews

  • Jack reviewed on 1/30/2025 5:00 PM
    Reviewed on Crutchfield
    Sku: WET75-4
    MTX WET75.4
    Awesome product - works great
    0
  • James reviewed on 5/9/2024 5:00 PM
    Reviewed on Crutchfield
    Sku: WET75-4
    MTX WET75.4
    Great amp, plenty of power for the speakers sounds great
    0
  • Crutchfield customer reviewed on 6/22/2021 5:00 PM
    Reviewed on Crutchfield
    Sku: WET75-4
    Great Amp good sound quality
    I called in to get help selecting an Amp for my Pontoon boat. The sales rep was great and asked all the right questions. We found this amp and it was the right choice. This is a great amp so far. Very easy to install and only took a few mins to adjust the gain settings. The power out is perfect for my application and it is not big of an Amp. This Amp also delivers great sound quality.
    0
  • Troy reviewed on 7/27/2020 5:00 PM
    Reviewed on Crutchfield
    Sku: WET75-4
    MTX WET75.4
    So far so good. Would have liked an internal fuse. Didn't think much of it until I had to buy a Marine fuse. Working on gain adjustment detail which has a big impact on volume. The connections seem to be great quality. Included allen wrenches made it easy to connect speaker and power wire. Would buy again after the current experience.
    0
  • Crutchfield customer reviewed on 7/8/2020 5:00 PM
    Reviewed on Crutchfield
    Sku: WET75-4
    Power in a small box.
    Excellent!
    0
  • Crutchfield customer reviewed on 6/9/2020 5:00 PM
    Reviewed on Crutchfield
    Sku: WET75-4
    MTX WET75.4
    Amp is small for versatile mounting and has really good power to wake up your speakers.
    0
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Returns & Warranty

30-Day Money-Back Guarantee

At MTX Audio, we are serious about sound®. Therefore, if you are not "blown away" with your purchase, for any reason, you can return any items purchased directly from MTX.com that are complete and like new within 30 days. Products purchased from authorized MTX retailers must be returned through that same retailer. Products purchased through non-authorized MTX retailers may not be returned.

About Returns
Warranty Information

The warranty for WET75-4 is 24 months from the date of purchase.

MTX products purchased in the USA from an authorized MTX dealer are guaranteed against defects in material and workmanship for the period of time specified below, the warranty period begins the day the product is purchased by the end user. This warranty is limited to the original retail purchaser of product and extends only to products purchased from authorized MTX resellers. Product found to be defective during that period will be repaired or replaced by MTX at no charge.

About Our Warranty