REL Acoustics S/850 Subwoofer
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Product Overview & Specifications
The REL Acoustics S/850 serves as the flagship reference subwoofer of the revamped Serie S lineup. Engineered to surpass the output and dynamic scale of prior reference models, the S/850 pairs a 12-inch long-throw CarbonAlloy™ driver—featuring ultra-lightweight pure carbon-fiber dust caps—with an 850W RMS (1,000W peak) linear Class D power amplifier. The result is a fast, uncolored, and deep low-frequency extension reaching down to 19 Hz (-6 dB).
Designed for both high-end two-channel stereo systems and home theaters, the S/850 utilizes REL’s pure analog filter circuitry. Its famous High-Level Neutrik Speakon connection captures the exact sonic signature of your main amplifier, and it can operate simultaneously with the discrete .1/LFE channel input. Featuring thick internal aluminum bracing and billet cylinder feet, the S/850 is fully modular and ready for REL Line Array stacking configurations (up to 6 units high).
KEY FEATURES & SYSTEM HIGHLIGHTS
- 12" CarbonAlloy™ Driver with Carbon-Fiber Dust Caps: Utilizes pure carbon-fiber central caps to reduce moving mass and increase diaphragm rigidity for transient speed and low-frequency articulation.
- 850W RMS Linear Class D Monoblock Amp: Driven by a heavy-duty conventional power supply with thin-film input capacitors for 850 Watts of sustained output (1,000 Watts peak).
- Simultaneous High-Level & .1/LFE Inputs: Features REL's pure analog filter architecture allowing high-level stereo integration and discrete .1/LFE movie soundtracks to operate concurrently without switching settings.
- Serie S Line Array Compatibility: Built with internal aluminum slabs and precision mechanical couplers to allow stacking up to 6 units high for floor-to-ceiling line array scale.
- Airship Direct™ Wireless Ready: Fully compatible with the optional Airship Direct™ transmitter for zero-compression wireless streaming of both High-Level and .1/LFE signals simultaneously.
- Refined Aesthetic Finishes: Elongated cabinet proportions with warm silver-gold insignia, recessed handles, billet leveling cylinders, and support for an optional Premium Wood Grille.
SPECIFICATIONS
| Product Category | Flagship Reference Active Subwoofer |
| Active Driver | 12 in. (305 mm) Long-Throw CarbonAlloy™ (Pure Carbon-Fiber Center Cap) |
| Lower Frequency Response | -6 dB at 19 Hz |
| Amplifier Power & Type | 850 Watts RMS (1,000 Watts Peak) | Linear Class D |
| Input Connections | High-Level Neutrik Speakon, Stereo Low-Level RCA, LFE RCA, LFE XLR, AirShip Direct Wireless Port |
| Filter Architecture | 100% Pure Analog High-Speed Filters (Thin-Film Capacitors) |
| Line Array Stacking | Supported (Includes Line Array Mounting Hardware) |
| Wireless Capability | REL AirShip Direct™ Transmitter (Sold Separately) |
| Dimensions (H x W x D) | 488 x 410 x 540 mm (19.2 x 16.1 x 21.3 in) |
| Net Weight | 42.5 kg (93.7 lbs) |
| Included Accessories | 32 ft (10m) Neutrik Speakon Cable, 6 ft AC Power Cord, Line Array Mounting Hardware, Standard Cloth Grille, Manual |
| Optional Accessories | Premium Wood Front Grille, AirShip Direct™ Wireless Module |
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REL Acoustics S/850 Subwoofer
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