OSD Audio S81 MK2 On-Wall Speaker

Description

The OSD Audio S81 MK2 is a premium on-wall home theater speaker engineered to deliver powerful, cinema-quality sound while maintaining a slim, space-saving design. Designed for use as a left, center, or right (LCR) speaker, the S81 MK2 combines an advanced triple silk dome tweeter array with a high-performance 8-inch wood fiber woofer to produce exceptional clarity, wide dispersion, and dynamic output. Capable of exceeding Dolby® and THX® reference sound pressure levels, it is an ideal choice for dedicated home theaters and premium media rooms.

The speaker features a custom-designed second-order crossover, premium air-core inductors, German polypropylene capacitors, and Japanese silver solder to ensure accurate frequency response and natural sound reproduction. Its unique rotatable triple tweeter array allows installation in either vertical or horizontal orientation while maintaining consistent tonal balance and wide sound dispersion.

Built with an acoustically optimized MDF cabinet and an 8-inch long wood fiber cone woofer, the S81 MK2 delivers tight bass, articulate midrange, and detailed high frequencies. Gold-plated 5-way binding posts provide secure speaker connections, while the included wall-mount hardware makes installation quick and flexible. Whether used in a stereo setup or as part of a Dolby Atmos® surround system, the S81 MK2 offers outstanding performance for serious home theater enthusiasts.

Key Features

• Premium 8-inch on-wall home theater speaker
• Ideal for Left, Center or Right (LCR) channel applications
• Triple silk dome tweeter array for enhanced dispersion
• Rotatable tweeter module for horizontal or vertical installation
• 8-inch long wood fiber cone woofer
• Custom second-order crossover network
• Premium air-core inductors and polypropylene capacitors
• Gold-plated 5-way binding posts
• Acoustically optimized MDF cabinet
• High-transparency front grille
• Includes wall-mount bracket and mounting hardware
• Meets or exceeds Dolby® and THX® reference SPL levels
• Perfect for dedicated home theater installations

Technical Specifications

• Brand: OSD Audio
• Series: S Series MK2
• Model: S81 MK2
• Speaker Type: On-Wall Home Theater Speaker
• Configuration: 2-Way
• Woofer: 8-Inch Long Wood Fiber Double-Compressed Cone
• Tweeter: Triple Silk Dome Tweeter Array
• Crossover Frequency: 2,200 Hz (12dB Second Order)
• Power Handling: 180 Watts
• Sensitivity: 91 dB (1W/1m)
• Maximum SPL: 112 dB
• Frequency Response: 70 Hz – 22 kHz (±3 dB On-Wall), 45 Hz (-10 dB)
• Nominal Impedance: 4 Ohms
• Speaker Terminals: Gold-Plated 5-Way Binding Posts
• Cabinet Construction: MDF
• Grille: High-Transparency Removable Grille
• Mounting: On-Wall (Bracket Included)
• Finish: Black PUV Coated Surface
• Dimensions (H × W × D): 30.9 × 10 × 6.25 Inches (785 × 254 × 159 mm)
• Weight: Approx. 10.9 kg
• Application: Home Theater, LCR Speaker, Media Rooms