S/850

S/850 is built for uncompromising performance, blending power with refinement. Featuring an 850-watt Linear Class D amplifier, advanced CarbonAlloy™ drivers, and innovations from our Reference line, it delivers explosive dynamics, nuance, and effortless scale.

Premium Wood Grille orders ship the week of December 20th, 2025.

• 850-watt Linear Class D Amplifier
• 12" CarbonAlloy™ Active Driver with 12" Long-Stroke Passive Radiator
• Music & Theater Systems, Medium-to-Large Rooms
• Stereo Pairs & Line Arrays
• Optional Premium Wood Grille Available. As a natural wood material, grain and color variations are expected and unique to each grille

Stunning Design Meets Raw Power

S/850 stands as the benchmark of the Serie S line, with its design innovations shaping and elevating its three stablemates. Every improvement is sweeping and comprehensive, ensuring the entire Serie S family benefits from the advancements pioneered in the S/850.

The results are spectacular: it delivers incredible attack and output beyond even the former Carbon Special at the very limits of performance, yet with the precision, quietness, and clarity that produce true dynamic range. Lightning-fast transients, deep effortless bass, and tonal richness combine to deliver nuance that elevates both music and theater.

Designed to be Perfect

The S/850 cabinet is longer, lower, wider, and deeper—proportions that give it a naturally dynamic presence. Subtle design details refine its look and feel: clean creases that catch the light, warm silver-gold badges with a titanium-like finish, and stainless-steel handles recessed into graceful ellipses. Beneath each front rail, precision-milled billet cylinders provide exact leveling, while thick internal aluminum slabs secure the handles for safe stacking in Line Arrays. Designed to complement modern interiors, the S/850 also offers an optional Premium Wood Grille, adding warmth and individuality.

What's in the box

• Serie S/850 Subwoofer
• 6' AC Power Cord
• 32' Neutrik Speakon cable
• Line Array Mounting Hardware
• Cloth Grille
• User Manual and Warranty Information
• *The Premium Wood Grille is NOT included in your subwoofer purchase but is available for purchase.

W x H x D

19.25 x 16.125 x 21.25 in.

(488 x 410 x 540 mm)

850 watts (RMS) Linear Class D

12 in. (305mm), Carbon/Carbon flat cone structure, steel chassis

-6 dB at 19Hz

Technical Specifications

Type

Front-firing active driver, down-firing passive

Active Driver Size & Material

12 in. (305mm) long-throw, CarbonAlloy™ cone structure, die cast alloy chassis

Passive Radiator Size & Material

12 in. (305mm), Carbon/Carbon flat cone structure, steel chassis

Low Frequency Extension

-6 dB at 19Hz

Input Connectors

High Level Neutrik Speakon, Low Level (2) RCA, (1) LFE RCA, (1) LFE XLR

Output Connectors

High Level Neutrik Speakon, (1) Low Level RCA, (1) LFE RCA or (1) LFE XLR

Power Output

850 watts (RMS)

Amplifier Type

Linear Class D

Wireless Capability

REL AirShip Direct (sold separately)

Dual Parametric Filter

N/A

Finish

Piano Black Lacquer, Gloss White Lacquer 8 coats

Fully Electronic Set Safe

Yes

D.C. Fault

Yes

Output Short

Yes

Mains Input Voltage

220-240 volts, 1120-120 volts for certain markets

Fuses

8 Amp semi delay 220 volts operation, 15 Amp semi delay 120 volts operation

Mains Lead

Yes

Neutrik Speakon

Yes (10 Meters Nominal)

Interconnect

-

User Manual

Yes

Net Weight

93.5 lbs. (42.5 kg)