REL-HT/1205 MkII - REL HT/1205 MkII Serie HT 12" 500 W
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The REL HT/1205 MkII from New Zealand TV & HiFi Limited is a powerful home theatre subwoofer designed for deep, fast, room-filling bass. Featuring a 12" CarbonGlas carbon fibre/glasfibre driver and a high-output 500 W amplifier, it delivers tight impact for movies, gaming, and music.
Key features:
- 12" CarbonGlas driver for speed, strength, and low distortion
- 500 W power for high SPL and cinematic dynamics
- Ideal subwoofer upgrade for home cinema and AV systems
- Clean, controlled low-frequency performance
Information
Big-Cinema Performance. Compact Footprint.
HT/1205 MKII brings fast, controlled theater bass to any room, powerful, compact, and beautifully understated.
- Punchy, controlled bass from a 500-watt Class D amplifier
- Deep, accurate response from a 12" CarbonGlas driver
- Clean, modern aesthetic with a line-grained composite cabinet
- Exceptional theater output for its size and price
High-Impact Home Theater, Perfectly Balanced
Designed specifically for pure home theater, HT/1205 MKII delivers explosive dynamics and clean, controlled bass that feels instantly cinematic. It brings scale, impact, and excitement into your space, powerful enough to thrill, yet refined enough to stay composed.
Inside, HT/1205 MKII is engineered for speed, control, and effortless impact, creating bass that feels tight, confident, and perfectly integrated with the rest of your system. Every moment lands with clarity and intention, enhancing immersion without drawing attention to itself.
Finished in REL’s purposeful cabinet design and available in both Black and White, HT/1205 MKII combines compact dimensions with a rigid, vibration-damping structure. A lightweight 12” CarbonGlas™ driver and high-current 500W Class D amplifier work together to deliver fast, authoritative bass, while specially developed home theatre input filters keep performance flat and controlled deep into the 20Hz range. For systems already anchored by REL’s Reference, Serie S, or Serie T/x subwoofers, it integrates seamlessly as a dedicated .1/LFE solution, adding cinematic weight without changing the system’s character.
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DesignDesigner Exterior The beautiful new cabinetry is bespoke; it has new textures, proportions, and finishing touches previously unseen in the category. Lower, sleeker cabinetry borrows proportions drawn from our new Reference models. Over the years, our experiments have established that this results in a faster, deeper presentation of bass—all while looking smashing. Your eye is immediately drawn to the top panel, whose entire surface finished in 5 coats of hand-polished piano black lacquer. A discreet REL logo floats within the top layer of lacquer whilst the body of the cabinet is clad in horizontally streaked, line-grained composite. The entire affair looks expensive, bespoke, and tastefully restrained. Additionally, you can stylishly combine it with either Serie T/x or Serie S in large, fully-immersive REL HT/3D™ setups.* |
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DriverDrive Like You Mean It The HT/1205 MK II’s driver is a 12” (300mm) CarbonGlas™ construct as it has always been, but all its components were beefed up. It is improved in both large and small ways, enabling it to deliver the greatest performance possible. Lightweight, stiff, and quiet, the combination of glass fibre primary cones with true carbon fibre centre caps results in a cost-effective yet pistonic cone. Larger, more powerful magnets produce more energy. Upgraded suspension designs control the HT/1205 MKII’s output all the way out to the limits of both the amplifier and the driver. The result is crazy output, while the HT/1205 MKII remains fast and liquid. |
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AmplifierNow Hear This! Amplifiers do the heavy lifting in a theatre subwoofer. We turned to a true tier one amp supplier to build our latest design for us—they did not disappoint. They included thicker boards, upgraded the power supplies, and did all the stuff that results in a brutally powerful amp with remarkable longevity. Additionally, the MOSFET power modules rated at 800 watts mean this amp is just cruising at its 500-watt rating. It produces truly awe-inspiring sound. While the theatre gets all the headlines, the HT/1205 MKII’s big secret is that it sounds sublime in musical applications. Big and robust-sounding, it is sure to become an instant classic. |
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WirelessWired For Sound: HT-Air Wired for sound used to entail long runs of cable strewn across the floor. With our optional HT-Air™, great sound has become “un-wired.” Wire has been replaced by a tiny transmitter and matching receiver that sends an incredibly fast 5.8Ghz wireless signal up to 60 feet with no digital compression. This affordable circuit includes the same LSIC chip that powers our state-of-the-art AirShip II, minus the expensive analogue-to-digital and digital-to-analogue (DAC) convertors. The HT-Air is perfect for the .1/LFE signals using RCA connectors that are HT/1205 MKII’s primary mission. |
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HT/1205 MKII (a.k.a The Cannon) HT/1205 MKII establishes a new performance standard for affordable home theatre subwoofers. Avoiding electronic gimmickry in favor of properly balanced priorities; cabinets that are right-sized, solidly braced and beautifully finished. A sparkling new amp design that effortlessly delivers 500W into an all-new CarbonGlas™ 12” (300mm) driver. |
The sexy new black lacquer top plate has a subtle REL logo floating on top, while the expensively wrought black line-grained composite for the cabinet looks the business. HT/1205 MKII plays 50% louder than its predecessor, while also delivering more precision and subtlety. It is capable of output levels more commonly found in models well over $1,000/£1,000. Fantastic for music and available HT-Air rounds out a perfect offering. |
Wired For Sound: HT-Air
Wired for sound used to entail long runs of cable strewn across the floor. With our optional HT-Air™, great sound has become “un-wired.” Wire has been replaced by a tiny transmitter and matching receiver that sends an incredibly fast 5.8Ghz wireless signal up to 60 feet with no digital compression. This affordable circuit includes the same LSIC chip that powers our state-of-the-art AirShip II, minus the expensive analogue-to-digital and digital-to-analogue (DAC) convertors. The HT-Air is perfect for the .1/LFE signals using RCA connectors that are HT/1205 MKII’s primary mission.
At 6 dB louder than any previous REL within 50% of its price, the original HT/1205 was a remarkable value.
Features
- Closed box, front firing woofer
- 12" CarbonGlas™ carbon fibre / glasfibre driver
- 500 Watt NextGen5 Class D power amplifier
- Low frequency extension: -6dB at 22 Hz Dual purpose low level stereo RCA or LFE RCA inputs & outputs
- Optional HT Air Zero Compression wireless module
- Dimensions (WxHxD): 413mm x 387mm x 438mm
- Net weight: 19.6 kg
- Line grain black or white composite finish with 15mm, 5-layer lacquered top
Specifications
Technical Specifications
Type
Closed box, front-firing driver
Active Driver Size & Material
12 in. (300mm) long-throw, CarbonGlas™ cone structure, inverted carbon fibre centre cap, steel chassis
Passive Radiator Size & Material
NA
Low Frequency Extension
-6dB at 22 Hz Low Frequency
Input Connectors
(2) Low Level RCA or (1) LFE RCA
Output Connectors
Daisy Chain (2) Low Level RCA or (1) LFE RCA
Power Output
500 watts (RMS)
Amplifier Type
Class D
Wireless Capability
HT- Air MKII (sold separately)
Dual Parametric Filter
N/A
Finish
Horizontally Oriented Lined Grained Black Composite Cabinet, 15mm Top Plate, finished in 5 coats of Hand rubbed High Gloss Black Lacquer
Protection System
Fully Electronic Set Safe
Yes
D.C. Fault
Yes
Output Short
Yes
Mains Input Voltage
220-240 volts, 110-120 volts for certain markets
Fuses
4 Amp semi delay 230b, 4 Amp semi delay 115b operation
Supplied Accessories
Mains Lead
Yes
Neutrik Speakon
NA
Interconnect
No
User Manual
Yes
In the interest of product development, REL Acoustics Limited reserve the right to vary these specifications without notice.
DIMS
W x H x D
16.25 in. x 15.25 in. x 17.25 in.
(413 x 387 x 438mm)
Net Weight
43.2 lbs. (19.6kg)
What's in the box
- Serie HT/1205 MKII Subwoofer
- Grille
- 6' AC Power Cord
- User Manual & Warranty Information
- Quick Start Guide
- Safety Information



















