Overview
The Poly-Planar 850621 represents a reliable solution for marine audio applications. This 8-inch surface-mount speaker system is engineered specifically for waterproof performance in demanding marine and vehicle environments. Built with components designed to withstand saltwater spray, UV exposure, and corrosion, the Poly-Planar 850621 delivers consistent audio quality where durability matters.
Key Features
- 8-inch surface-mount speaker design for marine and vehicle installation
- 10W RMS power rating with 4-8 ohm impedance compatibility
- Waterproof construction throughout with stainless steel hardware
- UV-resistant plastic frame and protective grill
- Compact mounting depth for flexible installation options
- Engineered for boats, yachts, and automotive audio systems
Technical Specifications
- Power Rating: 10W RMS
- Impedance: 4-8 ohms
- Speaker Diameter: 8 inches
- Mounting Type: Surface mount
- Construction: Waterproof/marine-grade
- Grill Material: Stainless steel
- Frame Material: UV-resistant plastic
- Applications: Marine and vehicle audio
Typical Applications
The Poly-Planar 850621 is ideal for marine environments where audio durability and reliability are critical. Common installations include boat cabin audio systems, yacht entertainment setups, and vehicle outdoor audio applications. The waterproof design ensures consistent performance even in high-moisture environments where standard speakers would fail.
Compatibility & Replacements
Compatible With
- Marine audio receivers and amplifiers
- Vehicle audio systems with 4-8 ohm output
- Low-power audio distribution systems
- Waterproof/marine-rated amplifier installations
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. Confirm that the Poly-Planar 850621 matches your existing mounting footprint, impedance requirements, and power specifications.
Works With
- Standard marine audio receivers
- 12V and 24V marine power systems
- Weatherproof amplifier installations
- Multi-zone marine audio systems












