REL Acoustics HT/1205 MKII
Fast, forceful and remarkably composed, the HT/1205 MKII brings tight, punchy bass and cinematic impact to films without clouding the soundtrack. Its sealed 12-inch driver and 500W amplification deliver sharp transients, textured low-end detail and easy system blending; Sound Advice especially admired its precision. A polished choice for listeners who value controlled dynamics over brute-force excess.
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Deliciously Crispy
Bass
92/100
Integration
94/100
Dynamics
94/100
Build Quality
87/100
Features Usability
82/100
Value for Money
93/100
Pros
Delivers deep, clean bass with exceptional speed, precision and punch for action soundtracks.
Integrates easily and cleanly with home-cinema and stereo systems, preserving clarity and avoiding overhang.
Compact, attractive sealed cabinet combines substantial build quality with room-friendly styling.
Cons
Does not reach as deeply or deliver the outright blunt-force output of some larger rivals.
Feature set omits room correction, EQ, app control, remote operation and balanced XLR inputs.
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What Reviewers Are Saying
Assessments of Build Quality, Usability, and Overall Propositions.
Bass
92/100
Reviewers consistently praise deep, controlled and detailed bass, from chest-rumbling film effects to textured electronic and acoustic material. It reaches convincingly into the 20-30Hz region and stays tight rather than bloated, although Sound Advice notes that some rivals dig deeper and offer more outright blunt-force impact.
Integration
94/100
The HT/1205 MKII is repeatedly described as controlled, free of overhang, and easy to blend into a system. Home Theater Review found matching it to the front stage straightforward, while Nemo Propaganda says it integrated perfectly with every speaker pair tried; Audiograde also heard a more focused image and greater solidity around vocalists in a stereo setup.
Dynamics
94/100
Its transient response earns especially strong praise: reviewers describe bass that starts and stops with expert precision, remains tight and punchy, and gives gunfire, explosions and percussion a sharply timed kick. Audiograde also found ample reserve for medium rooms and useful headroom for larger spaces without sounding overwhelmed.
Build Quality
87/100
The compact cabinet is described as substantial and thoughtfully finished, with internal MDF bracing, a vibration-damping gloss top plate, curved corners and solid isolation feet. Reviewers praise its attractive, room-friendly presentation, though the highly glossy top can reflect a TV or projector image depending on placement.
Features Usability
82/100
Rear-panel level, crossover and phase controls are simple and clearly labelled, and reviewers found the sub straightforward to install and tune. RCA/LFE inputs, daisy-chain outputs and optional HT-Air wireless operation are useful, but competing models often provide room correction, EQ, app control, remotes or balanced connections that are absent here.
Value for Money
93/100
Reviewers regard the HT/1205 MKII as a strong performer for its asking price, with Home Theater Review calling it an easy recommendation at $949 against more expensive competitors. Audiograde calls its performance remarkable at the price, while Nemo Propaganda found its output, extension and detail especially impressive in its roughly $699 price category.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
Online Reviews & Mentions
YouTube Reviews
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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
- 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
- Mains Lead
- Yes
- Neutrik Speakon
- NA
- Interconnect
- No
- User Manual
- Yes
- 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)
Manufacturer's Description — REL Acoustics
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
Bring the Theatre Home
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.
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.
Designer 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.*
Drive 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.
Now 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.
PerfectFilters: Where it All Starts – Amplifier
REL input filters are renowned throughout the audio world. They bring together ultra-fast crossovers, elevation filters that extend the flatness of deep bass, and explosive-sounding integrated limiters. This compact series of analogue circuits is REL’s secret recipe in both music and film sound. Refined in this second generation, the secondary filters are much higher in frequency; they make the rarefaction of air in the sound of an explosion to feel that much more realistic. Also, our latest circuit includes an all-analogue subsonic filter that begins as low as 8 Hz to minimize the effects of infra-noise from soundtracks that extends well below the resonance point of the driver. The result is incredible delivered power with the ability to play all the way to the driver’s limit without distortion.
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.
Verified Dealers
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Authorized dealers for REL Acoustics HT/1205 MKII
- The ASOC Gallery of Fine Audio — in-store — Stratford, Ontario, Canada (website)
- The Music Room — online and in-store — Erie, Colorado, United States (website)
- 110Hz — online and in-store — Kielce, Województwo świętokrzyskie, Poland (website)
- 3mA Audio — online and in-store — Houston, Texas, United States (website)
- Abt Electronics — online and in-store — Glenview, Illinois, United States (website)
- Acoustic Streams — in-store — Lower Drift, England, United Kingdom (website)
- Acoustica — online and in-store — Chester, England, United Kingdom (website)
- All Elite Audio — online and in-store — Perry Hall, Maryland, United States (website)
- Alta Fedelta — online and in-store — Lombardia, Italy (website)
- American Sound — in-store — Richmond Hill, Ontario, Canada (website)
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