Poly-Planar MS56 Box Subwoofer
Login to see prices $179.96
Weight | 8 lbs |
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MS56 Box Subwoofer
The MS-56 subwoofer is a compact, high-efficiency bass enclosure optimized for marine applications. Its small size enables it to be easily mounted below seats, under the gunwale area, behind the instrument panel, or in any convenient location.
The MS-56 is a self-contained bass unit requiring no cutting of panels or holes in the boat interior. It produces solid, deep bass extending down to 40Hz and is the perfect addition to any audio system.
Features:
- Dual Voicecoil, high-excursion, 5.25″ woofer
- High density, UV stable enclosure
- Water-resistant
- Bass-reflex, high-efficiency acoustic design
- Side vented output ports
- Compact size and molded-in mounts provide for convenient installation nearly anywhere
Technical Specifications:
- Max Power – 100W RMS
- Frequency – 40 Hz – 300 Hz
- Weight: 8.5 lb (3.8g)
- Dimensions (W x L x H) – 8-5/8″ x 11.5″ x 4-13/16″ (218 x 292 x 122mm)
*Sold as an Individual
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.


⚓ Smooth Sailing Shipping
Enjoy FREE standard shipping on most orders over $250 within the continental U.S. (excl. heavy/oversized/hazardous items).
We ship via UPS, FedEx, and USPS . Orders are processed in 1–2 business days with typical delivery in 1–5 business days .
🧭 Track The Voyage
You’ll receive tracking info by email once your order ships. If your package is marked “delivered” but not received, please wait 48 hours then reach out to our team.
🛟 Hassle-Free Returns & Exchanges
Returns accepted within 30 days of delivery. Items must be unused and in original packaging.
- Mistaken or damaged cargo? We’ll handle return shipping.
- Changed your course? Return shipping is on you.
- Report defects or damage within 7 days for a free exchange.
💰 Anchor Your Refund
Refunds go back to your original payment method within 5–7 business days after inspection.
📨 Contact the Crew
Questions about your order? Drop anchor at sales@marineelec.com .
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