Appointment-only · Melbourne private listening and room measurement · Australia-wide product enquiriesFree Room Bass Analysis
MSN Audio
EN / 中文

REL ACOUSTICS · SUBWOOFERS

REL No.31

A front-firing 12-inch carbon-fibre driver, 900-watt NextGen 7 amplifier, dual parametric filters and Reference Remote define No.31. It is the more compact Reference option, but that does not automatically make it the right solution for a small room.

$14,999

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.

Request AvailabilityText MSN Audio

New product · Enquiry only · No online checkout

Official REL REL No.31 product view.

WHO IT IS FOR

Who it is for

Primary roles

  • For reference-level two-channel or cinema systems where No.32 is physically impractical, but Reference controls, sealed architecture and matched-model Line Array capability remain relevant.
Official REL REL No.31 alternate finish or grille view.
Official REL No.31 alternate configuration media supplied by REL.
Official REL REL No.31 rear panel or construction detail.
Official REL No.31 detail media supplied by REL.
Official REL REL No.31 shown in a styled room setting.
Official REL room-setting image for REL No.31; 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 XLR, Line XLR. Connection guidance: Use the topology-specific High-Level connection guidance in the Reference manual for the exact amplifier. A generic balanced or Class D diagram may not be safe for every design.

02

Installation and integration

Plan safe handling for the 52 kg enclosure and preserve ventilation and cable access. Use only matched No.31 units and REL-specified hardware in a professionally engineered Line Array. Configure phase, crossover, gain and parametric filters from measurements, not presets.

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

  • Reference-level two-channel systems using High-Level or Low-Level input.
  • Cinema systems using RCA or balanced XLR LFE.
  • Professionally designed stereo-pair or matched No.31 Line Array systems.

What to keep in mind

  • The 17 Hz figure is a manufacturer -6 dB specification. Current official pages name different wireless generations, so the exact accessory must be confirmed.
  • Dual parametric filters do not replace room measurement or justify automatic EQ values.
  • The exact current wireless accessory is held because the official page names two different generations.

ROOM & INSTALLATION

What to confirm before choosing the final configuration.

TECHNICAL REFERENCE

Specifications grouped for useful comparison.

Manufacturer specifications

Acoustic configuration
Sealed enclosure; front-firing active driver; no passive radiator
Active driver
12 in (300 mm) long-throw carbon-fibre driver with inverted carbon-fibre centre cap
Manufacturer low-frequency extension
17 Hz at -6 dB
Amplifier
900 W RMS NextGen 7 Class D
Filter and control
Dual parametric filters; REL Reference Remote
Dimensions (W × H × D)
638 × 435 × 720 mm (W × H × D)
Net weight
52 kg
Manufacturer-listed finish
Piano Black Lacquer, 12 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 No.31 cover?+

$14,999 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 No.31

Considering the REL No.31? 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 No.31

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

Prefer to text us?Text MSN Audio
Request AvailabilityText MSN Audio