Connection context
Inputs: 2 × Low Level RCA or 1 × LFE RCA. Outputs: Daisy-chain: 2 × Low Level RCA or 1 × LFE RCA. Wireless: HT-Air MKII is manufacturer-listed as an optional accessory.
REL ACOUSTICS · SUBWOOFERS
HT/1205 MKII
A sealed 12-inch CarbonGlas driver and 500-watt Class D amplifier position HT/1205 MKII between the compact HT/1003 MKII and flagship HT/1510 Predator.
$1,999
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.
New product · Enquiry only · No online checkout
WHO IT IS FOR
Who it is for
Primary roles
- For cinema-first systems that require more scale than HT/1003 MKII without the size, weight and output potential of HT/1510 Predator.
ARCHITECTURE
Understand what each feature means in a complete system.
Installation and integration
Use low-level/LFE connection guidance only. Keep ventilation and mains-disconnect clearances specified in the manual. Do not vertically stack HT/1205 MKII.
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
- Requires low-level RCA or an LFE RCA signal; no High Level input is provided.
- Daisy-chain outputs support a designed signal topology but are not a quantity recommendation.
- Processor crossover, timing, gain and phase need to be set for your system.
What to keep in mind
- 22 Hz is a manufacturer -6 dB specification, not measured response.
- No High Level input is fitted.
- The 22 Hz figure is a manufacturer -6 dB specification. The model has no High Level input and is not a stackable Line Array product.
ROOM & INSTALLATION
What to confirm before choosing the final configuration.
- Dedicated or mixed-use rooms where LFE integration, cabinet clearance and listening-seat coverage can be measured.
- Check processor settings, crossover, level and the delay and phase relationship. A second subwoofer may help achieve more even bass distribution rather than simply more output.
TECHNICAL REFERENCE
Specifications grouped for useful comparison.
Manufacturer specifications
- Type
- Closed box; front-firing active driver
- Active driver
- 12 in / 300 mm CarbonGlas
- Passive radiator
- None
- Manufacturer low-frequency extension
- -6 dB at 22 Hz
- Power output
- 500 W RMS
- Amplifier
- Class D
- Dimensions (W × H × D)
- 413 × 387 × 438 mm
- Net weight
- 19.6 kg
- Manufacturer-listed finish family
- Line-grained composite cabinet with gloss top plate; current global feed shows Black and White
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.
ADJACENT ROLES
Compare architecture before choosing a model.
REL ACOUSTICS · SUBWOOFERS
HT/1510 Predator
A sealed 15-inch CarbonGlas driver, 1,000-watt amplifier and dual parametric filters provide substantial cinema capability. REL also supports a manufacturer-engineered stacking route, but stacking should be treated as a project decision rather than a default recommendation.
$4,199
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.
REL ACOUSTICS · SUBWOOFERS
HT/1003 MKII
A sealed, front-firing 10-inch CarbonGlas driver and 300-watt Class D amplifier form the compact entry to Serie HT. It is designed around low-level/LFE connection rather than REL High Level integration.
$1,599
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.
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.
FAQ
Before you enquire.
What does the Australian price for HT/1205 MKII cover?+
$1,999 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 HT/1205 MKII
Considering the REL HT/1205 MKII? 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 AcousticsHT/1205 MKII
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