Tzero enriches even modest systems with power and natural bass, bringing the quality and full REL connectivity suite, long throw drivers and powerful, reliable amplifiers to a new lower price point and dimension.

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Miracle In Miniature

100% REL, Just Smaller

Tzero is, in many ways, the most difficult design we have ever executed because never before have we delivered so much for so little. 5 coats of lacquer, as in all Serie T/i, next generation Class D amplifiers, High level inputs, .1 separate input stages, rugged 6.5” main driver with exceptional output and low bass extension for its size means Tzero gives up little to much larger units from the competitors. Tzero is a miracle in miniature.


So Much, In So Little

Compact Power & Finesse

Tzero is built using a super stiff cabinet construction that drives the resonant frequency higher so it is more easily damped by our instrument-grade bracing. We utilized 5 full coats of lacquer, and solid aluminium feet and badging because REL owners understand quality must extend throughout a product, not just in the most obvious locations. And its diminutive scale allows it to all-but-hide among the furnishings in your home.


Outsized Performance

Bass Beyond Its Size

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

Right Sized Power & Control

Though Tzero is REL’s entry level, that doesn’t mean it can’t punch far above its weight class. 100W 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. Includes a full REL connectivity suite, fast 8ms delay filter set and our famed High Level Input as well as a .1/LFE input.

Customer Reviews

Based on 29 reviews
Perfect For My Application

The Tzero is perfect for my 10'x10' home office system. That system consists of a Windows 10 PC providing lossless tracks to PS Audio Sprout 100 (via USB) and then to KEF LS50s sitting on Iso Acoustics Aperta stands set at 6 degrees. Build quality of Tzero is outstanding and REL customer service went above and beyond by contacting PS Audio on my behalf to determine the optimal connection to the Sprout. From the multiple ways to connect the Tzero, they determined it was best to connect the Sub Out on Sprout to Tzero’s low level input. At Paul McGowan’s recommendation I used Blue Jeans Subwoofer Cable and speaker wires to the KEFs. I am currently running the Tzero’s crossover point at 20 clicks (12 o’clock) and low-level input at 20 clicks (12 o’clock).

Wow - from such a small unit!

2 rel zeros, could not believe that the beautiful smooth integration of sound & quality of these little beauties. High Quality build is secondary to the fantastic sound output, absolutely stunning.
Coupled with Q Acoustics 3020i / 3010i / 3090i in front & 3010 rear driven by Denon 2600.
Works brilliantly as surround system & excessively good as Stereo output, needs tweaking to set up, but what a result 👍👍

Small and compact yet mighty sound

Small and compact yet mighty sound I’m using 2 REL Tzero subs with my magnapan .7’s. The subs are great, they are compact ,have a wonderful sound, and complement my speakers perfectly I would encourage anybody to buy REL subs without hesitation.

Small to medium size room? Get this and don't look back.

Excellent small sub.

The positive reviews are correct

I paired this with my KEF LS50 speakers in a 12x12 room. It's fantastic. It rounds out the sound without overwhelming or muddling things. It's become something "you don't even know is there," but, I assure you, once added to your system, it'd be missed immediately if taken away. Easy set-up. Great purchase.


Suggested Retail: $449

Tzero enriches even modest systems with power and natural bass, bringing the quality and full REL connectivity suite, long throw drivers and powerful, reliable amplifiers to a new lower price point and dimension.



Closed Box, down-firing driver

Active Driver Size & Material

6.5in., 165mm long-throw, steel chassis

Passive Radiator Size & Material


Low Frequency Extention

-6dB at 38 Hz

Input Connectors

High Level Neutrik Speakon, Low Level single RCA, LFE RCA

Output Connectors


Power Output

100 watts (RMS)

Amplifier Type

Class D

Wireless Capability


Protection System

Fully Electronic Set Safe


D.C. Fault


Output Short


Mains Input Voltage

100-240 volts


2.00 Amp semi delay


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)


High Gloss Black, High Gloss White, 5 coats

Supplied Accessories

Mains Lead


Neutrik Speakon

Yes (10 Meters Nominal)


Users Manual


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