Wet Sounds WS 420 SQ

4-Band Parametric Marine Equalizer w/ 3 Zone Operation & Microphone

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Product videos

• 4-Band Parametric Marine Equalizer
• Microphone Turns Your System into a PA
• Frequency Response: 10-40,000 Hz
• Signal-to-Noise Ratio: 80dB

Learn more about the ws420sq
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Product Highlights

• 4-Band Parametric Marine Equalizer
• Microphone Turns Your System into a PA
• Frequency Response: 10-40,000 Hz
• Signal-to-Noise Ratio: 80dB


Wet Sounds

Authorized dealer

Take Control of Your Sound!

Wet Sounds represents the ultimate in high performance marine audio. The Wet Sounds WS-420SQ is a state of the art equalizer specifically designed to provide you with outstanding control over your boat's sound system. With this half DIN EQ you'll be able to control your tower speakers and in-boat speakers separately. The WS-420SQ will completely transform your boating experience!

3 Zone Operation

3 Zone Operation

The WS 420SQ allows you to take independent control of your tower speakers, in-boat speakers and subwoofers. It also gives you separate EQ adjustments for your tower speakers and in-boat speakers so you can further fine-tune your sound. It is the world's first true marine audio zone controller/equalizer.

Nylas™ Frame

Transform Your System into a PA

Another feature of the WS 420SQ is that it allows you to turn your tower speakers into a PA system with the push of a button. The included talk back microphone allows the driver to easily and safely communicate with passengers and other boats by simply clicking the button on the mic. When engaged, the system automatically mutes the music.

Nylas™ Frame

Boat-Link for the Ultimate Cove Experience

Wet Sounds exclusive Boat-Link™ feature allows you to link up with other WS 420SQ equipped boats to create the ultimate party on the water. To link multiple WS 420SQs, all you have to do is connect them via the 3.5mm jack in the back of the unit. Once connected, the two systems will be linked and you can really get the party started

General Features:

  • 4-Band Parametric Marine Equalizer with Microphone
  • 3 zone control of tower speakers, in-boat speakers and subwoofers
  • Talkback microphone transformers tower speakers into a PA system
  • Master and subwoofer volume control
  • Subwoofer frequency and level control
  • Left and right gain adjustments
  • Boat-Link function allows linking to another WS-420 equipped boat via 3.5mm mini-jack
  • Conformal coated circuit board
  • Chassis mounted RCA connections
  • Red or blue illumination
  • Optional WS-EQ IDM - S or WS-EQ UDM - S aluminum mounting bracket available
  • Wet Wire Signal Kits for Easy Installation Available
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty

Product Specifications:

  • Number of Bands: 4
  • Signal-to-noise ratio: 80dB
  • Maximum Output Voltage: 5 volts RMS
  • Cut/Boost: +/-12dB
  • Frequency response: 10-40,000 Hz
  • Bass Equalizer Frequency: 100 Hz
  • Mid-Bass Equalizer Frequency: 300 Hz
  • Midrange Equalizer Frequency: 2 kHz
  • Treble Equalizer Frequency: 15 kHz
  • THD: 0.05%
  • Input Impedance: 20,000 ohms
  • Stereo Separation: 80 dB
  • Dimensions: 7"W x 5"D x 1"H

Want to Learn More?

Check out the Wet Sounds WS 420 SQ Owner's Manual

Specifications & Details

Equalizer Specifications
Type of Equalizer
Equalizer Bands
4 band
Display Color
Red or Blue
Signal Boost/Cut
+/- 12 dB
Max Output Level
5 volts
Frequency Response
10 - 40000 Hz
Input Sensitivity
10 - 40000 volts
Channel Separation
10 dB
THD (Total Harmonic Distortion)
Signal-to-Noise Ratio
80 dB
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider

Item Details


Model Number:

WS 420 SQ



Internal SKU:


Internal Product ID:


Product and How-to Videos

  • Wet Sounds WS-420-SQ Marine Equalizer
  • What is an Equalizer (EQ) and How Does a Parametirc vs Graphic EQ Work?

Customer Ratings & Reviews

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Final piece to the puzzle

Definitely worth the money, this EQ allowed me to get the perfect balance between my in boat and tower speakers. It also gives me the option of turning down my tower speakers when we are just cruising around. Love the PA system

By Jeremy on December 1, 2015


found this helpful.


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Essential add-ons
NVX XIV23 V-Series: 2-Channel RCA Audio Interconnect Cable

V-Series: 3m (9.84 ft) 2-Channel RCA Audio Interconnect Cable



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