CH4330B vs MRGB65S: Which Marine Speaker Fits Your Boat?
By BOSS Audio Systems | Life at Full Volume | Published: 2026-11-04
Category: Vergleiche
Compare the CH4330B and MRGB65S marine speakers on size, lighting, and weatherproofing to decide which fits your boat's cutouts and listening style.
Quick answer
Choose the CH4330B if your boat has 4 x 10-inch cutouts and you want a simple full-range replacement; choose the MRGB65S if you have 6.5-inch openings and want weatherproof construction with multicolor lighting.
Size and cutout compatibility come first
The CH4330B is a 4 x 10-inch full-range speaker, while the MRGB65S is a 6.5-inch speaker. These are not interchangeable without enlarging or adapting the mounting hole, so measure your existing cutouts and check depth before comparing sound or features.
If your boat currently uses 4 x 10-inch speakers, the CH4330B drops into that footprint. If you have 6.5-inch openings, the MRGB65S is the direct fit. Adapter plates exist for some size changes, but they add complexity and can affect clearance.
Lighting and weatherproofing trade-offs
The MRGB65S includes multicolor illumination with 19 dynamic patterns and an illumination control hub, plus weatherproof construction and stainless steel hardware. That makes it the more feature-rich option for exposed locations where appearance and moisture resistance matter.
The CH4330B is a straightforward 3-way full-range speaker without listed lighting or weatherproofing claims. It suits protected installations or buyers who prioritize simple replacement over visual effects.
Power and system complexity
The CH4330B is rated as a 3-way system with a total power output of 400, using a poly injection cone, rubber surround, stamped steel basket, and two tweeters. The MRGB65S is a 2-way system with a polypropylene cone, resin-treated cloth surround, composite basket, and 1-inch tweeter.
The MRGB65S adds an illumination control hub and interconnect lighting control, which lets you add more speakers controlled by a single remote. That is convenient for a multi-speaker boat, but it also means more wiring and setup than the CH4330B requires.
Key trade-offs to weigh
- Cutout size: The CH4330B fits 4 x 10-inch openings; the MRGB65S fits 6.5-inch openings. Measure both the opening and mounting depth before buying. If your cutouts are 4 x 10, the CH4330B avoids adapter plates; if they are 6.5, the MRGB65S is the direct fit.
- Lighting and controls: The MRGB65S includes an illumination control hub, 19 dynamic patterns, and interconnect lighting control for adding more speakers on one remote. The CH4330B has no listed lighting features. Choose the MRGB65S only if you want lighting effects and are prepared for the extra wiring.
- Weather resistance: The MRGB65S is listed as weatherproof with stainless steel hardware. The CH4330B does not list weatherproofing, so it is better suited to protected locations. For exposed mounting, the MRGB65S offers more peace of mind; for enclosed areas, the CH4330B is simpler.
Product facts
- MRGB65S: 2-way system with 1-inch tweeter, multicolor illumination with 19 patterns, and weatherproof construction. Ideal for 6.5-inch cutouts where you want lighting effects and moisture resistance in one speaker.
MRGB65S - CH4330B: 4 x 10-inch 3-way full-range speaker with 400 total power output and two tweeters. A direct-fit replacement for 4 x 10-inch openings that delivers full-range sound without extra lighting wiring.
CH4330B
Which speaker fits your boat?
Best for
- Boats with existing 4 x 10-inch speaker cutouts and a desire for simple full-range replacement (CH4330B)
- Boats with 6.5-inch openings where lighting effects and weatherproofing are priorities (MRGB65S)
Not for
- Boat owners who cannot enlarge or adapt cutouts to match the other size
- Buyers who want lighting without additional wiring and control setup (choose CH4330B instead of MRGB65S)
- Installations needing weatherproofing in exposed locations (choose MRGB65S instead of CH4330B)
