How to Install CH4620 Marine Speakers on Your Boat

By BOSS Audio Systems | Life at Full Volume | Published: 2026-11-03

Category: 操作指南

A step-by-step guide to installing CH4620 4x6 marine speakers on your boat, covering cutout sizing, wiring polarity, and mounting tips to avoid common mistakes.

Quick answer

To install CH4620 marine speakers, first verify the cutout and screw hole pattern, then run and label the speaker wires before mounting. Use the supplied template or measure the 4x6 frame, and always check polarity to avoid weak or out-of-phase sound.

Plan the cutout before you cut

The CH4620 is a 4x6 speaker, but the actual cutout and screw holes depend on the mounting flange. Place the speaker against the panel and trace the opening, or use the template if one is included. Check behind the panel for clearance: the 1-inch tweeter and magnet need depth, and wires or foam can block the basket.

A common mistake is cutting to the overall frame size instead of the cutout. That leaves the screw holes too close to the edge and weakens the panel. Measure twice, and start with a pilot hole or a small test cut.

Run and label wiring before mounting

Boat speaker wiring is easier when the speaker is not yet in the way. Run positive and negative leads from the head unit or amplifier to each location, and label them left/right and front/rear. Keep wire away from sharp edges and moving parts, and leave a service loop so you can pull the speaker out later.

Do not rely on wire color alone; test polarity with a battery pop or a polarity checker. Reversed polarity on one speaker cancels bass and makes the system sound thin. If you are unsure which terminal is positive on the CH4620, check the speaker's markings or the manual before connecting.

Seal and protect the mounting surface

Marine speakers live with moisture, so treat the cutout edge. Seal bare wood or composite with a marine-grade sealant, and use a closed-cell gasket or foam ring between the speaker and the panel. This reduces water intrusion and helps prevent rattles.

Avoid over-tightening screws. The CH4620 uses a stamped steel basket, and uneven torque can bend the flange or crack gelcoat. Tighten in a cross pattern until the gasket just compresses.

Step-by-step CH4620 installation

Verify cutout and screw pattern: Hold the CH4620 against the mounting panel and trace the cutout opening, or use the template if supplied. Mark the screw holes, then check behind the panel for depth clearance for the tweeter and magnet. If the cutout is too large, add a backing plate rather than forcing the speaker into a loose hole.
Run and label speaker wires: Route positive and negative leads from the source to each speaker location, keeping them away from sharp edges and moving parts. Label each pair for left/right and front/rear before connecting. Test polarity with a battery pop or polarity checker before final connection; reversed polarity on one speaker ruins bass response.
Prepare the mounting surface: Seal bare wood or composite cutout edges with marine-grade sealant. Apply a closed-cell foam gasket or the supplied gasket to the speaker flange to keep water out and reduce rattles. Do not seal the speaker's rear vent or drain holes; only seal the panel surface.
Connect and mount the speaker: Connect the labeled wires to the CH4620 terminals, observing polarity. Set the speaker into the cutout and start screws by hand. Tighten in a cross pattern until the gasket compresses evenly. Stop tightening as soon as the flange contacts the gasket; over-tightening can bend the stamped steel basket.
Test and listen: Before reinstalling trim panels, play a familiar track and check for rattles, buzzes, and correct left/right balance. If bass is weak, recheck polarity on all speakers. A quick polarity check now saves hours of troubleshooting later.

Product facts

CH4620: The CH4620 is a 4x6 full-range speaker with a 1-inch tweeter and a poly injection cone with rubber surround. The 4x6 size fits many factory cutouts, while the poly cone and rubber surround are designed for marine exposure, so check that your cutout matches the 4x6 frame before cutting.
CH4620