Small Size. Serious Performance. True REL DNA.Tzero MKIII brings fast, expressive bass to intimate environments perfect for offices, apartments, studios, and smaller living spaces.

• Clean, controlled low frequencies from a 100-watt Class D amplifier
• Speed and precision from a 6.5" aluminum driver
• Tight, natural sound via an acoustic-suspension cabinet
• Rigid, low-resonance construction with internal bracing

• Black
• White

• Single Subwoofer
• Stereo Pair

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100% REL, Just Smaller

Miracle In Miniature

Tzero is, in many ways, the most difficult design we have ever executed because never before have we delivered so much for so little. Five coats of your choice of black or white high gloss lacquer as in all Serie T, NextGen Class D amplifiers, our famous High Level Input, plus a separate .1/LFE input stage with its own volume control to get theatre levels AND music perfect without racing to adjust or looking for a remote control.

The jewel of the MKIII is the new aluminum-coned driver, a rugged 6.5” unit with exceptional output and low bass extension for its size. While it won’t drive medium or large rooms hard, we make plenty of larger models that handle that task, Tzero MKIII remains a miracle in miniature

Tzero is, in many ways, the most difficult design we have ever executed because never before have we delivered so much for so little. Five coats of your choice of black or white high gloss lacquer as in all Serie T, NextGen Class D amplifiers, our famous High Level Input, plus a separate .1/LFE input stage with its own volume control to get theatre levels AND music perfect without racing to adjust or looking for a remote control.

The jewel of the MKIII is the new aluminum-coned driver, a rugged 6.5” unit with exceptional output and low bass extension for its size. While it won’t drive medium or large rooms hard, we make plenty of larger models that handle that task, Tzero MKIII remains a miracle in miniature

Scaled for the Simple Life

At REL every design begins by defining and designing the best bass engine for a given application. With its new aluminum-coned long throw 6.5” driver, the MKIII is powerful and articulate, delivering surprisingly deep bass. Able to fill smaller spaces effortlessly. Have a much larger space? Turn to one of our larger models, there are plenty to choose from.

Outsized Performance

At REL every clean sheet design begins by defining and designing the best bass engine for a given application. While the long throw 6.5” is our smallest-to-date, but make no mistake it is powerful and articulate, able to fill medium-sized rooms effortlessly. Have a much larger space? Distribute them throughout for an unobtrusive spacious presentation of music and film sound.

Brains & Brawn

Though Tzero MKIII is REL’s entry level, that doesn’t mean it can’t punch far above its weight class. 100 high-current watts from a NextGen Class D amp means it holds its head high and is capable of delivering many years of satisfying performance. We feature the same high-quality input filters, crossovers and limiters as our larger models. Tzero MKIII includes a full REL connectivity suite, fast 8ms delay filter set and our famed High Level Input as well as a separate .1/LFE input with its own level control and a standby circuit that reliably comes alive at very low levels.

The REL Tzero MKIII delivers musical bass in an ultra-compact footprint. With a 6.5" forward-firing driver and a 100-watt Class D amplifier, it’s perfect for small spaces, desktops, or systems where discretion and detail matter more than sheer output. It brings REL’s signature speed and clarity to entry-level audio systems in smaller rooms.

The Tzero MKIII is designed primarily for 2-channel music systems however it has a LFE input to for compact home theater setups. This unit goes down to 40Hz so this model isn't going rattle your foundation but it will add texture and impact to low-frequency effects. It’s best suited for smaller spaces where clarity and tight bass are preferred over deep cinematic rumble.

Yes, the Tzero MKIII can be paired with other REL subwoofers. For mixed-series integration, Tzero MKIII works well with T/5x of Serie HT.

The Tzero MKIII is ideally suited for small rooms up to 150 square feet, making it a perfect choice for bedrooms, home offices, or compact apartment living areas. It’s designed to deliver exceptional sound quality in spaces where every inch counts.

While Tzero MKIII is not designed for vertical line array stacking, it excels when used in stereo pairs or dual-sub setups.