Features

Description: The Wet Sounds WS-420BT is a marine equalizer/pre-amp with line level outputs for tower speakers, "in-boat" speakers, and a subwoofer, plus a microphone input (with microphone included). The tower and in-boat channels have independent 4-band equalizers. There are four source inputs: main (RCA), aux (3.5mm), microphone, and a built-in Bluetooth receiver. The 1/2 DIN chassis can be mounted in-dash, or under-dash using the included brackets.

4-Band EQ: Rotary knobs adjust the output +/-12 dB at 100 Hz (bass), 300 Hz (mid-bass), 2 kHz (midrange), and 15 kHz (treble). The four center knobs control the in-boat channels, and the outer rings control the tower channels. There's a notch at each control's center position so it's easy to return to the flat setting. The EQ settings have no effect on the subwoofer output.

Volume: The relative volumes of the tower, in-boat, and subwoofer outputs, and the microphone input are independently adjustable. A separate main volume knob controls all the output volumes simultaneously.

Inputs: Use the rotary source switch to select between three inputs: main (RCA jacks on the rear panel), aux (3.5mm mini-jack on the rear panel), and the built-in Bluetooth receiver.

Outputs:

• Tower: Female stereo RCA outputs on the rear panel are routed to the amplifier powering the tower speakers. The tower channel outputs have an independent relative volume control (also controlled by the main volume) and independent equalizer controls. When the included microphone is keyed, the tower input is muted and the signal from the microphone is output through the tower speakers.
• In-Boat: Female stereo RCA outputs on the rear panel are routed to the amplifier powering the in-boat speakers. The in-boat channel outputs have an independent relative volume control (also controlled by the main volume) and independent equalizer controls. The signal from the included microphone is not routed to the in-boat speakers, thus keying the mic has no effect on those channels.
• Sub: Female stereo RCA outputs on the rear panel are routed to the amplifier powering the subwoofer(s). The sub channel outputs have an independent relative volume control (also controlled by the main volume). The sub output is full-range, so an amp with a built-in crossover should be used. The microphone also has no effect on the subwoofer.

Microphone: The included microphone plugs into a 3.5mm jack on the back of the WS-420BT. Wet Sounds calls it a Talk Back Microphone and its signal is only routed to the tower speakers. When the microphone is keyed, the tower input is muted and the microphone input is output through the tower speakers. The microphone has a belt clip for mounting.

Ground Isolation: The power supply ground can be changed using a jumper position inside the unit, in case of ground loop noise. The factory position is 220Ω, but can be changed to ISO or GND.

Illumination: A blue ring around each knob is lit whenever the unit is on. The color can be changed to red by changing a jumper position inside the unit.

Boat-Link: Wet Sounds' Boat-Link feature allows linking the system to another WS-420 equipped boat via a 3.5mm mini-jack on the back of the unit.

Input Gain: The input gains for the main input left and right channels and the auxiliary input left and right channels are set independently to match the source outputs to the EQ input. The four potentiometers are inside the unit.

Dimensions:

• Width:
  • Faceplate: 8.068"
  • Chassis: 6.927"
• Height:
  • Faceplate: 1.653"
  • Chassis: 1.057"
• Mounting Depth: 5.563"
• Knob Protrusion: 0.628" (distance the knobs protrude from the mounting surface)

Mounting: The WS-420BT can be flush mounted in an existing panel, or the included brackets can be used to mount it below (or above) a horizontal surface. Depending on how you bolt the brackets in place, they will extend the flange width of the chassis to either 8-1/8" or 9-1/4".

Specifications:

• Bass Equalizer Frequency: 100 Hz
• Mid-Bass Equalizer Frequency: 300 Hz
• Midrange Equalizer Frequency: 2 kHz
• Treble Equalizer Frequency: 15 kHz
• Equalizer Range: +/-12 dB
• S/N Ratio: 80 dB (1 volt input)
• Frequency Response: 10 Hz - 40 kHz (-3 dB)
• Maximum Output Voltage: 5 volts RMS
• THD: 0.05%
• Input Impedance: 20 kΩ
• Stereo Separation: 80 dB (at 1 kHz)
• Operational Voltage: 11-15 volts DC (negative ground)