REL TZero MKIII 100 Watt Subwoofer - White

REL Tzero MKIII Compact Subwoofer – White

Small in Size. Big on Bass Performance.

Bring deeper, cleaner bass into your system with the REL Tzero MKIII Subwoofer, a compact active subwoofer designed for music lovers and home cinema users who want serious low-end performance without sacrificing valuable floor space. Built for smaller rooms, apartments, studios and office setups, the Tzero MKIII proves that compact subwoofers can still deliver powerful, accurate bass.

Engineered with REL’s signature sound philosophy, this latest version combines a redesigned aluminium bass driver, a fast Class D amplifier and a sealed cabinet design to produce bass that feels tight, natural and controlled rather than overwhelming.

Compact Design, Genuine REL Performance

The Tzero MKIII is REL’s most compact subwoofer in the Serie T range, created for systems where space is limited but performance still matters. Its slim footprint makes it easy to position beside speakers, furniture or AV setups without dominating the room.

Despite its small size, it delivers the kind of low-frequency weight and authority that transforms the listening experience—adding scale to music, depth to films and impact to games.

For smaller living rooms and dedicated listening spaces, it’s an ideal upgrade.

New 6.5-Inch Aluminium Driver for Faster Bass Response

At the heart of the Tzero MKIII is an upgraded 6.5-inch downward-firing aluminium bass driver, developed to improve speed, precision and bass extension.

Aluminium offers an excellent balance of stiffness and lightness, allowing the driver to move quickly and accurately. This means bass notes start and stop with greater control, avoiding the slow or boomy sound often found in compact subs.

The result is bass that feels tighter, punchier and more musical—perfect for rhythm-heavy tracks, cinematic effects and detailed low-frequency reproduction.

Efficient Class D Amplification

Powering the Tzero MKIII is an efficient 100-watt Class D amplifier designed for speed and efficiency.

Class D amplification helps deliver clean, controlled power while generating less heat and consuming less energy. This allows the subwoofer to respond quickly to dynamic changes in audio, maintaining control even during demanding bass passages.

Whether it’s subtle bass textures in music or explosive movie soundtracks, the amplifier keeps everything composed and accurate.

Acoustic Suspension Cabinet for Cleaner Sound

Unlike ported designs that can exaggerate bass, the Tzero MKIII uses a sealed acoustic suspension cabinet for tighter, more natural low-frequency performance.

This cabinet design improves transient response, meaning bass sounds more precise and integrated with your main speakers.

It’s particularly beneficial for music listening, where timing and tonal accuracy are essential.

Strong Cabinet Construction with Internal Bracing

REL has designed the cabinet with heavy internal bracing and radiused edges to reduce unwanted resonance and cabinet vibration.

This structural rigidity helps keep the sound clean and focused by preventing distortion caused by enclosure movement.

The result is a cleaner bass response with better detail and improved overall clarity.

Flexible Connectivity for Hi-Fi and Home Cinema

One of the biggest strengths of the Tzero MKIII is its flexible input options, making it easy to integrate into almost any system.

High-Level Input (REL Neutrik Speaker Connection)

REL’s famous high-level connection takes the signal directly from your amplifier’s speaker outputs, allowing the subwoofer to match the tonal character and timing of your main speakers.

This creates a more natural and seamless blend, especially in stereo systems.

Low-Level Phono Input

Ideal for standard stereo connections, offering clean integration with preamps, DACs and integrated amplifiers.

Dedicated LFE Input

Perfect for AV receivers and surround sound systems, allowing direct connection to the dedicated subwoofer channel for film and TV performance.

This separate LFE input also has its own level control, making it easier to switch between music and cinema without adjusting settings every time.

Adjustable Crossover for Better System Matching

The onboard crossover control extends down to 25Hz, allowing you to fine-tune how the subwoofer integrates with your speakers.

This flexibility helps achieve a smoother transition between the main speakers and subwoofer, creating a more balanced and cohesive soundstage.

Whether paired with bookshelf speakers, floorstanders or soundbars, setup remains straightforward.

180° Phase Switch for Easier Placement

The built-in phase switch helps align the subwoofer’s output with your main speakers.

This is especially useful if room layout or positioning affects bass timing, helping achieve stronger, cleaner bass performance in your listening position.

Ideal for Dual Subwoofer Systems

The Tzero MKIII works exceptionally well in twin-subwoofer setups.

Using two compact subwoofers can create a more even bass distribution across the room while improving speed, balance and stereo imaging.

For stereo systems, placing one sub near each speaker can dramatically improve bass consistency while freeing the main speakers to focus on midrange and vocals.

The result is often better clarity and improved overall system performance.

Premium High Gloss Finish

REL has given the Tzero MKIII the same premium finish as its larger models, with a deep five-layer high-gloss White lacquer that gives it a sleek, premium appearance.

Combined with its compact shape and smart aluminium feet, it looks refined and modern in any room.

It’s a subwoofer designed to be seen as well as heard.

Key Features

• Compact 6.5-inch downward-firing active subwoofer
• 100W Class D amplifier
• New aluminium bass driver for improved speed and punch
• Sealed acoustic suspension cabinet for tighter bass
• Internal bracing for reduced resonance and distortion
• High-level Neutrik speaker input for seamless hi-fi integration
• Low-level phono input for stereo systems
• Dedicated LFE input for home cinema systems
• Independent LFE level control
• Adjustable crossover down to 25Hz
• 180° phase switch for system alignment
• Premium high-gloss White finish

Perfect for Smaller Spaces, Built for Bigger Sound

The REL Tzero MKIII is proof that you don’t need a large subwoofer to achieve deep, musical and controlled bass. Whether you're upgrading a stereo setup, improving a soundbar or adding impact to your home cinema system, it delivers REL’s signature bass quality in one of the most compact designs they’ve ever built.

For smaller rooms where space matters but performance still counts, the Tzero MKIII is a serious upgrade.

Technical Specifications