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SERIE T

Tzero MKIII

$549

The Tzero MKIII delivers pure REL performance—powerful, natural bass in a more compact form, all at an unbeatable price.

100-watt Class D Amplifier
6.5" Aluminum Driver
Acoustic Suspension Cabinet Design
Internal Bracing for Low Resonance

Color:Black

Black
White

Setup:One Subwoofer

Single Subwoofer
Stereo Pair

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3 Year warranty

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Tzero MKIII

Single Subwoofer
Black

$549

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 ...
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Design

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.

Driver

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.

Amplifier

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.

Specifications

Technical Specifications

Type

Closed Box, down-firing driver

Active Driver Size & Material

6.5in. (165mm) long-throw, aluminum cone, steel chassis

Passive Radiator Size & Material

N/A

Low Frequency Extension

-6dB at 37 Hz Low Frequency

Input Connectors

High Level Neutrik Speakon, Low Level (1) RCA, (1) LFE RCA

Output Connectors

N/A

Power Output

100 watts (RMS)

Amplifier Type

Class D

Wireless Capability

HT- Air MKII (sold separately)

Dual Parametric Filter

HT- Air MKII (sold separately)

Finish

Piano Black Lacquer, Gloss White Lacquer 5 coats

Protection System

Fully Electronic Set Safe

Yes

D.C. Fault

Yes

Output Short

Yes

Mains Input Voltage

100-240 volts

Fuses

2.00 Amp semi delay

Supplied Accessories

Mains Lead

Yes

Neutrik Speakon

Yes (10 Meters Nominal)

Interconnect

User Manual

Yes

In the interest of product development, REL Acoustics Limited reserve the right to vary these specifications without notice.

Dimensions

DIMS

W x H x D
8.5 x 9.5 x 10.5 in.
(216 x 241 x 260 mm)

Net Weight

15 lbs. (6.8 kg)

Faq

What are the benefits of adding Tzero MKIII subwoofers to my system?

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.

Can Tzero MKIII be used in both music and home theatre systems?

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.

Can the Tzero MKII be integrated with other REL subwoofer series?

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.

What size room is ideal for Tzero MKIII?

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.

Can I stack Tzero MKIII in a line array configuration?

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

Awards & Industry Reviews

“I can say without a doubt that these tiny REL’s excelled in becoming one with my monitors in a way I’d never really experienced prior…. Overall I fell in love with these little REL’s. They’re small, WAF (Wife Acceptance Factor) friendly, and in the right circumstances would be all you’re looking for in a two channel system.”

- Everyday Audiophile

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Outstanding Product

I have always felt a subwoofer points to a deficiency in the main pair of speakers, this, again, is not the case. I feel as if the subwoofer makes speakers more efficient and in the case of these two REL Tzero MKIIIs they are supporting the soundstage handsomely, without becoming too overbearing.

- HiFi and Music Source

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"I think the Tzero MKIII is a serious over achiever...the fact that it's so freaking tiny and beautifully finished, you could just tuck it away anyway. It has a lot going for it and it comes highly, highly recommended"

- Steve Gutteberg, The Audiophiliac

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"I've enjoyed my time with this subwoofer. It was quite surprising in a lot of ways. I did not expect the things it did and the ways it delivered it. I think at the end of the day, in the right hands, for the right customer, I could see people saying that's the best $500 I ever spent."

- Nemo Propaganda

- Nemo Propaganda

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"tu nuevo botón de "loudness" protege tus oídos! "

- De Audiofilos y Locos

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"The Tzero III acquitted itself really well. It’s tiny, but that doesn’t stop it adding useful low-end grunt to speakers up to, say, £1,000. It also opens up their soundstage notably, a benefit that shouldn’t be underestimated. "

- HiFi Starters Club

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