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REL ACOUSTICS · SUBWOOFERS

REL S/850

A front-firing 12-inch CarbonAlloy driver, down-firing 12-inch passive radiator and 850-watt Linear Class D amplifier position S/850 above S/550 while retaining stereo-pair and Line Array capability.

$7,799

2-year standard Australian warrantyAvailable to order in Australia. Stock and delivery timing are confirmed for each enquiry.Base single-unit configuration. Optional finishes, grilles, accessories, pairs and arrays are confirmed separately.

Free shipping Australia-wide. Change-of-mind returns are not accepted. This does not limit rights available under Australian Consumer Law.

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Official REL REL S/850 product view.

WHO IT IS FOR

Who it is for

Primary roles

  • For larger or more demanding systems that may benefit from the S/550's output and scale, with room to plan a future matched-model expansion.
Official REL REL S/850 alternate finish or grille view.
Official REL S/850 alternate configuration media supplied by REL.
Official REL REL S/850 rear panel or construction detail.
Official REL S/850 detail media supplied by REL.
Official REL REL S/850 shown in a styled room setting.
Official REL room-setting image for REL S/850; it does not represent MSN Audio stock or a local installation.

ARCHITECTURE

Understand what each feature means in a complete system.

01

Connection context

Inputs: High-Level Neutrik SpeakOn, 2 × Low-Level RCA, LFE RCA, LFE XLR. Outputs: High-Level Neutrik SpeakOn, Low-Level RCA, LFE RCA or LFE XLR. Wireless: Compatible with optional Airship Direct. Connection guidance: Follow topology-specific instructions for Class D, balanced, bridged and monoblock amplifiers.

02

Installation and integration

Maintain clearance for the down-firing passive radiator and ventilation. Use supplied REL hardware and matched S/850 units only in a professionally designed Line Array. Tune phase, crossover and level after positioning and measurement.

SYSTEM / ROOM MATCHING

Will it fit the system you already own?

We consider connections, room context, installation and your listening priorities together before suggesting a configuration.

What to check for your system

  • High-end two-channel systems using High-Level or Low-Level input.
  • Cinema systems using RCA or balanced XLR LFE.
  • Professionally designed matched-model stereo-pair or Line Array systems.

What to keep in mind

  • The 19 Hz figure does not describe the customer’s in-room response or decay. Line Array capability is not a quantity or placement recommendation.
  • Line Array capability is not a recommendation for quantity or placement.
  • Final integration requires phase, crossover and level tuning in the installed system.

ROOM & INSTALLATION

What to confirm before choosing the final configuration.

TECHNICAL REFERENCE

Specifications grouped for useful comparison.

Manufacturer specifications

Acoustic configuration
Front-firing active driver; down-firing passive radiator
Active driver
12 in (305 mm) long-throw CarbonAlloy driver
Passive radiator
12 in (305 mm) Carbon/Carbon flat-cone passive radiator
Manufacturer low-frequency extension
-6 dB at 19 Hz
Amplifier
850 W RMS Linear Class D
Dimensions (W × H × D)
488 × 410 × 540 mm (W × H × D)
Net weight
42.5 kg
Manufacturer-listed finish
Piano Black Lacquer or Gloss White Lacquer, 8 coats

EXTERIOR & CONFIGURATION

Confirm the supplied product, not just the model name.

Finish

Current finish options are confirmed during the enquiry. Official media identifies the model but is not an inventory promise.

Supplied configuration

The displayed price is for the base single-unit configuration. Finish, accessories, pairing and any other configuration are confirmed in writing before an order is accepted.

MEASUREMENT REMAINS INDEPENDENT

Establish the room evidence before prescribing a product outcome.

Room & Bass Measurement can identify the bands and decay behaviour that deserve attention without presuming this product, a quantity or a placement is the answer. The service does not require a product purchase.

View Room & Bass Measurement

FAQ

Before you enquire.

What does the Australian price for REL S/850 cover?+

$7,799 is the base single-unit price with a two-year standard Australian warranty. Optional finishes, grilles, accessories, pairs or arrays are confirmed separately. Availability does not imply local stock or a fixed delivery time. These warranty terms do not limit statutory consumer guarantees under Australian Consumer Law.

PRODUCT INFORMATION

See where the product facts come from.

Official REL Acoustics information was checked 23 July 2026. The Australian price includes 2-year standard Australian warranty. We confirm availability and expected delivery timing when you enquire.

AUSTRALIAN ENQUIRY & SUPPORT

Enquire about REL S/850

Considering the REL S/850? Tell us about your loudspeakers, room and current low-frequency setup. We’ll confirm Australian availability, answer your questions, and help you determine whether this model makes sense for your system and how it should be integrated.

REL AcousticsREL S/850

Do not include passwords, payment details, serial numbers or sensitive personal information.

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