REL-HT/1003 MkII - REL HT/1003 MkII Serie HT 10" 300W
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The REL HT/1003 MkII Serie HT delivers powerful, precise bass for movies and music, making it an ideal home theatre subwoofer. Featuring a fast, rigid 10" CarbonGlass carbon fibre / glassfibre driver and a high-current 300W amplifier, it produces tight impact, deep extension, and clean dynamics for action scenes and detailed soundtracks.
Key features:
- 10" CarbonGlass driver for speed and control
- 300W power for room-filling low frequencies
- Designed for HT performance: punchy, cinematic bass
- Great match for AV receivers and modern surround systems
Available from New Zealand TV & HiFi Limited.
Information
Small Footprint. Huge Impact. Pure Home-Theater Energy.
HT/1003 MKII doubles the output of the original while keeping the speed, control, and detail that define REL performance.
- Clean, authoritative impact from a 300-watt Class D amplifier
- Strong, fast response from a 10" CarbonGlas™ driver
- Modern, understated design with a line-grained composite cabinet
- Exceptional output for small and mid-sized rooms
Compact Power, Cinematic Impact
Designed specifically for pure home theater, HT/1003 MKII delivers fast, impactful bass that brings movies and games to life without overwhelming the room. It’s a subwoofer that feels agile and controlled, adding excitement, scale, and realism while staying perfectly balanced with the rest of your system.
Engineered for speed and precision, HT/1003 MKII produces bass that’s tight, confident, and effortlessly immersive. It enhances every scene with clarity and punch, allowing soundtracks and effects to hit harder while keeping dialogue and detail intact.
Finished in REL’s purposeful cabinet design and available in both Black and White, HT/1003 MKII pairs compact dimensions with a rigid, vibration-damping enclosure. A lightweight 10” CarbonGlas™ driver and high-current Class D amplification deliver clean, authoritative low frequencies, supported by specially developed home theatre input filters that keep bass flat and controlled deep into the 20Hz range.
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DesignDesigner Clothing The sexy new cabinetry is bespoke, with new textures, proportions, and finishing touches previously unseen in the category. Lower, sleeker cabinetry borrows proportions drawn from our new Reference models. Through experimentation over the years, we have found that this results in a faster, deeper presentation of bass—all while looking smashing. The eye is immediately drawn to the top panel, which is 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. Also, it can be combined 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 HT/1003 MKII’s driver remains a 10” (250mm) CarbonGlas™ construct to keep its overall size reasonable in its role as the powerhouse for slightly more modest spaces. Every component was beefed up—improved in ways both large and small 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 greater energy. Upgraded suspension designs with enlarged surround to permit greater travel means output remains under control all the way to the limits of amplifier and driver. The result is prodigious output for this price point while remaining fast and liquid, as do all RELs. |
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AmplifierAmplified Excellence Amplifiers do the dirty work and the heavy lifting in a theatre subwoofer. We turned to a true Tier One amp supplier to build our latest design for us; they didn’t disappoint. They created thicker boards, and upgraded power supplies—all the stuff that, while not sexy, results in a brutally powerful 300W amp (did you know all RELs are specified as RMS Continuous, just like a big, expensive 300 W monoblock amp?) with remarkable longevity. It generates truly awe-inspiring sound. While its theatre applications get all the headlines, its big secret is that it sounds sublime in musical applications. Big and robust-sounding, the HT/1003 MKII is sure to become an instant classic. |
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WirelessWired For Sound: HT-Air Being wired for sound used to require long runs of cable strewn across the floor. With our optional HT-Air™, great sound can be “un-wired”—replaced by a tiny transmitter and matching receiver that sends an incredibly fast 5.8Ghz wireless signal up to 60 feet without digital compression. This affordable circuit includes the same LSIC chip that powers our state-of-the-art AirShip II, without the expensive discrete analogue-to-digital and digital-to-analog (DAC) convertors. It is perfect for the .1/LFE signals using RCA connectors that are HT/1205 MKII’s primary mission. |
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HT/1003MKII (aka The Hammer) Insane Performance at its Size and Price. Buy an HT/1003 MKII if you either don’t have the space or don’t require the extra output of our larger models. It’s that simple. More compact, just as beautiful, it delivers identical build quality to its siblings. |
It’s style makes it an ideal partner in HT/3D REL theatre setups with Serie T/x. All-new 300W Class D amplifier offers greater headroom and powers a new CarbonGlas™ 10” (250mm) driver. This combination delivers devastating output, playing TWICE as loud as the original. At this price, this performance is unheard of. The icing on the cake is that, like all the new HT’s, it responds beautifully when playing music, and HT-Air delivers state of the art (optional) wireless. |
Features
- Closed box, front firing woofer
- 10" CarbonGlas™ carbon fibre / glasfibre driver
- 300 Watt NextGen5 Class D power amplifier
- Low frequency extension: -6dB at 24 Hz
- Dual purpose low level stereo RCA or LFE RCA inputs & outputs
- Optional HT Air Zero Compression wireless module
- Dimensions (WxHxD): 362mm x 343mm x 387mm
- Net weight: 18.6 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
10 in. (250mm) long-throw, CarbonGlas™ cone structure, inverted carbon fibre centre cap, steel chassis
Passive Radiator Size & Material
NA
Low Frequency Extension
-6dB at 24 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
300 watts (RMS)
Amplifier Type
Class D
Wireless Capability
HT- Air MKII (sold separately)
Dual Parametric Filter
N/A
Finish
Horizontally Oriented Line Grained Composite, 15 mm Top Plate, finished in 5 coats of hand-rubbed high gloss 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
6.3 Amp semi delay 230 or 115 volts 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
14.25 in. x 13.25 in. x 15.25 in.
(362 x 343 x 387mm)
Net Weight
34.2lbs. (15.5kg), shipping weight 41 lbs. (18.6 kg)
What's in the box
- Serie HT/1003 Subwoofer
- Grille
- 6' AC Power Cord
- User Manual & Warranty Information
- Quick Start Guide
- Safety Information


















