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MTX WET75.4

400W Wet Series 4-Channel All Weather Class A/B Marine/Powersports Compact Amplifier

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MTX WET75.4

400W Wet Series 4-Channel All Weather Class A/B Marine/Powersports Compact Amplifier

$249.95

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NVX XKIT44

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50% Off NVX Universal Bluetooth Controller with Purchase!

Save $37.49 when you add an NVX XUBT3 Universal Bluetooth Controller to your Amplifier purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

37.50

77593

2265

MTX WET75.4

$249.95

+

50% OFF

NVX XUBT3 Universal Bluetooth Controller Knob

$74.99

Special Price $37.49 ($74.99 if purchased separately)

NVX XUBT3 Universal Bluetooth Controller Knob

• iPhone, Android & Bluetooth Device Ready
• One Knob Controls it all – Track, Pause & Volume
• Flush in Dash or Under Dash Mounting options
• Add-on to any Radio or Device with AUX input

50% Off NVX Universal Bluetooth Controller with Purchase!

Save $37.49 when you add an NVX XUBT4 Universal Bluetooth Controller to your Amplifier purchase. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

37.50

77593

2275

MTX WET75.4

$249.95

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50% OFF

NVX XUBT4 Universal Bluetooth Receiver and Remote Control

$74.99

Special Price $37.49 ($74.99 if purchased separately)

NVX XUBT4 Universal Bluetooth Receiver and Remote Control

• Marine Grade Bluetooth Audio Controller/Receiver
• Designed for marine and powersports applications
• Bluetooth version 4.0
• Delivers CD-like sound quality wirelessly
• Membrane Switchpad

(Offer 1 of 2)

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$287.44

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MTX Audio Store
MTX WET Amplifier

MTX WET75.4 4-Channel Amplifier

The MTX WET75.4 4-Channel Amplifier is a compact amp perfect for marine or powersport use. The small chassis will make install easier by being able to place it in a convenient area of your vehicle. If you're worried about the circuitry getting messed up over time, MTX has you covered! The electronics are designed to resist vibration and moisture. The amplifier also has a lot of awesome features to control your audio. The weather resistant design, in accordance with IP55 rating, helps protect this amplifier from the elements. With over 40 years of audio experience, MTX Audio makes sure and knows how to create quality audio in their products, and the Thunder Marine Wakeboard Tower Speakers System is no exception!

MTX Wet Series Amplifier

Easy Mount and Weather-resistant

With the amplifier built in accordance with the IP55 rating, it is perfect for any marine or powersport application. The surface mount technology helps this amp resist vibrations and the Conformal Coated Circuit Board helps to resist moisture. The amp's small chassis makes it possible to mount the amplifier in the perfect and most convenient spot for your vehicle.


MTX Wet Series Amplifier

Audio Control

The WET75.4 4-Channel amplifier has a variable crossover, low-pass filter and high-pass filter for more control over your audio. The connections around the RCA connectors have a rubber gasket and the controls have a plastic cover to protect from the elements.


General Features:

  • Wet Series 4-Channel Class A/B Marine Amplifier
  • RMS Power Rating:
    • 4 ohms: 75 watts x 4 chan.
    • 2 ohms: 100 watts x 4 chan.
  • Weather Resistant in Accordance with IP55 Rating
  • Pulse Width Modulated MOSFET power supply
  • LED power (green) and protect (red) indicators
  • Conformal coated circuit board
  • Surface mount technology
  • Plastic splash guard over control-adjustments
  • Stainless Steel Hardware
  • Rubber Gaskets Around RCA Connectors
  • Soft start turn-on
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heat-sink for extreme heat dissipation
  • Input sensitivity: 200mV - 5V
  • Frequency Response: 15 - 25,000 Hz
  • Total Harmonic Distortion (THD): <1%
  • Signal to Noise Ration: >78dB
  • Variable low-pass filter (Rear Only): 50 - 750 Hz
  • Variable high-pass filter (Front): 10 - 200 Hz
  • Variable high-pass filter (Rear): 50 - 750 Hz
  • Fuse Rating: 60A x 1 (Recommended, NOT included)
  • 4 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • Dimensions: 12.15"W x 6.40"L x 2.25"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product History:

MTX WET75.4 thumbnail
(newest, current model)
MTX TM904 thumbnail
(previous model, replaced by MTX WET75.4)

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

75 watts x 4 channels
RMS Power @ 2 ohms

The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.

If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.

100 watts x 4 channels
Peak Power Output
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage occurring. Often times this maximum is achieved during a brief musical burst, such as a drum accent, or low bass hit.

Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison.

100 watts x 4 channels

Amplifier Specifications

Marine Certified
Marine certified means that the unit has been designed and manufactured with a marine use in mind. It will withstand the harsh conditions that come from marine use. Generally, they are treated against UV rays and treated with special protective coatings.
Yes
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

AB
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
4
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

400 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
4 ohms
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
<1%
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
No
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-Pass (LP)
High-Pass (HP)
Full (AP)
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
>78 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
60A Fuse Recommended, Not Included

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
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Product Summary

Manufacturer

Model Number

WET75.4

UPC

715442241781

Weight

8.00lbs

Internal SKU

wet754

Internal Product ID

77593

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: MTX WET75.4