REL Acoustics HT/1003 Mark II Subwoofer Black

REL HT/1003 MKII Subwoofer – Compact Power, Cinematic Impact

Experience powerful, room-filling bass in a space-friendly design with the REL Acoustics HT/1003 MKII Subwoofer. Engineered for home cinema performance yet refined enough for music, this compact sub delivers impressive output, precision, and control—making it an ideal choice for smaller rooms or multi-subwoofer setups.

Compact Size, Serious Output

Don’t be fooled by its footprint. The HT/1003 MKII delivers up to 10dB more output than its predecessor—effectively doubling perceived volume. This added headroom creates a more effortless, dynamic sound that brings films and music to life with greater impact and realism.

Advanced CarbonGlas™ Driver Technology

At the heart of this subwoofer is a newly upgraded 10-inch CarbonGlas™ driver. Combining a lightweight glass fibre cone with a rigid carbon fibre centre cap, it achieves the perfect balance of stiffness and responsiveness. The result is fast, controlled bass with excellent clarity—even at high output levels.

300W Class D Amplifier for High-Energy Performance

A robust 300W Class D amplifier powers the system, delivering consistent performance and deep, punchy bass. Built using high-quality components and enhanced power supply design, it ensures reliability while maintaining the speed and precision REL is known for.

PerfectFilter™ Technology for Deeper Bass

REL’s all-analogue PerfectFilter™ extends low-frequency performance while maintaining tonal balance. Combined with an upgraded secondary filter, it allows more energy higher in the frequency range, creating a more explosive and immersive soundstage.

Designed for Home Cinema and Music

While optimised for cinematic impact, the HT/1003 MKII also excels with music playback. Its refined tuning and fast response ensure bass lines remain tight and articulate, making it a versatile addition to both AV and stereo systems.

Wireless-Ready Convenience

For flexible placement without cable clutter, the HT/1003 MKII supports REL’s HT-Air MKII wireless system (sold separately). This enables high-speed, low-latency wireless transmission for a clean and convenient setup.

Key Features

• Compact subwoofer with powerful, room-filling output
• 10-inch CarbonGlas™ driver for fast, controlled bass
• 300W Class D amplifier with enhanced headroom
• PerfectFilter™ technology for deeper, more accurate lows
• Up to 10dB more output than previous generation
• Ideal for home cinema and music systems
• Optional HT-Air MKII wireless compatibility

Technical Specifications

• Type: Closed box, front-firing driver
• Driver: 10” (250mm) CarbonGlas™ cone with carbon fibre centre cap
• Amplifier: Class D
• Power output: 300W RMS
• Frequency extension: -6dB at 24Hz
• Inputs: Low-level RCA (2) or LFE RCA (1)
• Outputs: Daisy chain RCA (2) or LFE RCA (1)
• Wireless: Compatible with HT-Air MKII (sold separately)
• Dimensions: 362 x 343 x 387 mm
• Weight: 15.5 kg

Big Sound, Small Footprint

The REL HT/1003 MKII Subwoofer is proof that compact design doesn’t mean compromise. With upgraded power, advanced driver technology, and refined filtering, it delivers deep, dynamic bass that enhances every scene, soundtrack, and beat—perfect for modern home entertainment systems.