REL Acoustics Serie HT 10-Inch Powered Subwoofer in Black (Each) - HT/1003MKII BLACK

REL Acoustics HT/1003MKII BLACK Serie HT 10-Inch Powered Subwoofer in Black (Each)

The REL Acoustics HT/1003MKII BLACK Serie HT powered home-theater subwoofer combines a sealed, front-firing enclosure, a 10 in CarbonGlas driver and a built-in 300-watt RMS Class D amplifier, with in-room low-frequency extension of -6 dB at 24 Hz. Designed primarily for cinematic bass in smaller living spaces, it also supports music listening. Low-level stereo RCA and LFE RCA inputs provide wired connection options, while optional HT-Air MKII wireless connectivity requires a separately sold accessory. The Black line-grained cabinet pairs subtle detailing with a hand-rubbed, high-gloss lacquer top.

Key Features

Sealed Bass: -6 dB at 24 Hz In-Room

Everyday television, streamed entertainment and movie soundtracks are central to this closed-box design. Intended partners include bookshelf and medium-size floorstanding speakers, making it a home-theater-focused option that also has a role in music listening. Its emphasis is cinematic impact suited to smaller living spaces, not a promise of large-room output.

Designer Clothing

The Black cabinet uses horizontally oriented line-grained composite, topped by high-density fiberboard finished with five coats of hand-rubbed high-gloss lacquer. Cabinet radii and subtle detailing are designed to coordinate with Serie T/x and Serie S, while dark gray, mineral-filled nylon feet complete the presentation.

Drive Like You Mean It: 10 in CarbonGlas Driver

Long bass excursions demand a cone that retains its shape as it moves. CarbonGlas pairs a glass-fiber main cone with a pure carbon-fiber center cap to resist deformation during that movement. The inverted center cap and steel chassis complete the long-throw driver construction.

Amplified Excellence: 300 Watts RMS

This is a continuous power rating, not a peak-power headline. The built-in NextGen5 Class D amplifier is supported by a larger power supply, thicker circuit boards and upgraded components designed to support output and reliability. No separate subwoofer power amplifier is required.

PerfectFilters and Tuned Limiters

An explosion begins with a sharp transient before its low-frequency weight arrives. Revised secondary filtering is designed to preserve that initial attack, while deeper-bass equalization supports what follows. Tuned limiters work with this filtering to increase usable output.

Four-Post Internal Bracing

Four internal posts help damp the cabinet surfaces as the driver works. Around the driver magnet, a felt-lined opening leaves the vent's airflow unobstructed, allowing the bracing and driver to share the enclosure without blocking that vent.

RCA Connections and Manual Phase Selection

Use low-level stereo RCA connections or an LFE RCA connection to match your system's output. Matching daisy-chain outputs allow additional subwoofers, including a rear-room role in a multi-subwoofer theater. The manual phase switch offers 0 or 180 degrees settings for integration. An interconnect cable is not included, and the cabinets are not intended to be stacked as a vertical line array.

Optional HT-Air MKII Wireless

Where a long signal-cable run would complicate placement, the separately sold HT-Air MKII provides the supported wireless option. Wireless hardware is not built in. AC power is still required; a 6 ft power cord is supplied.

Features

• -6 dB at 24 Hz In-Room Extension
  Provides documented low-frequency reach for home-theater bass.
• Black Line-Grained Finish
  Five hand-rubbed lacquer coats give the top panel a high-gloss finish.
• 10 in Long-Throw CarbonGlas Driver
  Combines glass-fiber and carbon-fiber construction in a front-firing driver.
• 300-Watt RMS Class D Amplifier
  Supplies continuous power from an amplifier built into the subwoofer.
• PerfectFilters
  Bass-elevation equalization supports the low-frequency impact of movie effects.
• Tuned Limiters
  Revised limiting helps make more output usable during demanding playback.
• Four-Post Internal Bracing
  Controls cabinet-panel vibration.
• Stereo RCA and LFE RCA Inputs
  Accepts two low-level RCA connections or one LFE RCA connection.
• RCA Daisy-Chain Outputs
  Passes the low-level or LFE signal on to another subwoofer.
• 0 or 180 Degrees Phase Switch
  Provides two manual phase settings for system integration.
• HT-Air MKII Wireless-Ready
  Supports wireless audio through the optional accessory, sold separately.
• Electronic Protection
  Includes Set Safe, D.C. fault and output-short protection.

Footnotes:

Performance figures reflect manufacturer testing under specific conditions and may vary with the room, settings and use.