Search  for anything...

REL Acoustics Tzero MKIII Powered Subwoofer – 6.5-Inch Down-Firing Driver with Class D Amplifier, RCA Inputs, Compact Design for Home Theater, Stereo Systems, and Surround Sound – High Gloss Black

Based on 70 reviews
Condition: New
Checking for the best price...
$599.00

Buy Now, Pay Later


As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon

Arrives Thursday, Nov 19
Order within 1 hour and 55 minutes

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

At a glance

Condition
New
Dimensions
8.5"D x 10.5"W x 9.5"H
Weight
15 lb
Color
High Gloss Black
Frequency Response
37 hertz
Audio Output Mode
Stereo
Mounting Type
Floor Standing
Works with
Desktop, Laptop, Projector, Television

Features 6

  • VERSATILE CONNECTION METHODS: Easily integrates into any home theater or stereo system with speaker outputs or a subwoofer output for seamless connectivity. Available in timeless black and modern white finish.
  • IDEAL FOR SMALL TO MID-SIZED SPEAKERS: Perfectly complements lower-end 3-way speakers or quality bookshelf speakers for an enhanced audio experience.
  • RECOMMENDED FOR SPACES UP TO 200 SQ FT: Provides pressurizing bass down to 40Hz at -6dB, with the option of using a stereo pair for a more elevated experience or larger listening spaces.
  • ENHANCED SOUNDSTAGE AND DEPTH: Adds textural depth and an expanded soundstage for a dramatically improved experience with both music and movies.

Description

Transform the way you listen to music and watch movies with REL Subwoofers. Step into a world where sound transcends the ordinary. Delivering fast, musical bass with deep, powerful lows for music and home theater, adding texture and clarity to your system. REL Line Arrays are designed to transform large listening spaces into immersive, full-range environments. By stacking multiple subwoofers vertically, they deliver effortless scale, greater dynamic headroom, and bass that remains fast, articulate, and perfectly integrated. The result is a sweeping, wall-to-wall soundstage with depth and realism that elevates both two-channel systems and reference-level home theaters, power without compromise. Born from British passion, the company quickly earned global audiophile trust, revealing new texture, depth, and space in music, and bringing lifelike realism to every home theater scene. We approach subwoofers with a philosophy rooted in precision, design, and performance. From finely crafted cabinets to industry-leading connectivity, we consider every detail. Designed for home theater, Serie HT delivers powerful, room-filling bass with exceptional clarity, control, and precision.

Specs 45

Brand REL Acoustics
Speaker Maximum Output Power 100 watts
Frequency Response 37 hertz
Connectivity Technology RCA
Audio Output Mode Stereo
Mounting Type Floor Standing
Enclosure Material Steel (steel)
Speaker Type Subwoofer

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Nov 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


Instant upgrade to my system with a minimum of fuss
I have a good quality two channel hifi setup in my home office (12x12) and had been thinking a subwoofer would be a great way to fill out the bottom end of my bookshelf speakers (Wharfedale Denton 85th). These are nicely resolving and crisp, driven with a Rega Elex-R, but I listen to enough music with low frequencies (ambient, techno, some metal) that I felt I could use a little rumble. No need for bowel busting bass, as we're all adults here, leave that for the home theater goons. The T/Zero was the perfect form factor, so small it practically disappears in the room. Setup was easy, long cable, unfussy placement -- if you're using banana plugs it's even easier to connect to your speaker taps. I had it up and running and configured within 15 minutes. It's placed about six feet behind my speakers near the corner of the room. You could construct a system with terrific dynamic range using this sub. In my case, all the warm midrange and detailed treble is handled by the speakers with all the low-end coming from the sub; I have the crossover set fairly high to plump up the sound. I feel it would take a lot more cost and effort to duplicate these sonics in a single speaker cabinet; my office system now sounds as good or better than my reference. A great investment. ... show more
Reviewed in the United States on December 18, 2023 by Brian Bieniowski

It gets the job done!
I have been searching for a small footprint subwoofer. I do not have that much space in my home yet I need the extra punch on the low end. My system is midfi so tweaking it is vital to me. My taste in music is eclectic. However have that extra kick in my classic music is just as important to me in have crisp bass in my jazz, folk, kpop, hip-hop and soul. This small package does it for me. It is not super booming and it gets the job done. ... show more
Reviewed in the United States on April 2, 2026 by Dwight

Might only be a 6.5 inch driver but i can hear bass tones as low as 27hz.
Unboxing I think this should have been double boxed. it was only single boxed and there was a hole in the side large enough i can put my finger in and touch the sub. but after unboxing there was no damage. design this thing is sleek looking, I love the gloss black even though it will be a pia to keep nice. Its so cute and tiny i can fit it in the corner behind my desk. connections I connected the sub to my Vanatoo T0s with a single sub cable to the lfe port on the sub. set the crossover on the Vanatoo to 125hz switched the back mode switch on the back of the T0s to bass. set the sub gain to its highest and then i can use the volume knob on the speaker to adjust the gain instead of having to go down to the back of the sub. it helped me very easily blend the sub in. you dont even hear the sub now. sounds like its all coming from the speakers. performance Its awesome. if i have the bass up to high even the little 6.5 inch driver can shake the walls. i turned it down enough to where the walls, my desk and other stuff stopped vibrating effecting the sound. How deep can this little Sub go??? How about decent output down to 30hz then still very reduced db down to 27hz but still audible . conclusion this sub is perfect for your standard 4 inch mid woofer/1 inch tweeter bookshelf speakers. its the perfect amount of added low end. it just seams like my Vanatoo T0s now have 6.5 inch woofers instead of 4 inch. they just sound 2-3 times there size. ... show more
Reviewed in the United States on August 2, 2022 by Alexander

Dedicated pure sound for a turntable setup
Definitely worth it for a small system within a small space. Beautiful depth. Incredible sound. The LFE output connection is so much more superior to simple audio RCA. This is unique and a trademark to KEF. Given I use this as a dedicated sub for a turntable and preamp setup the sound is incredible!
Reviewed in the United States on August 18, 2025 by Amazon Customer

Second one was great. Some shipping / construction issues.
I ordered this and the driver wasn't mounted correctly or got moved in shipping. I thought it might have been the break-in period. After a week of poor sound quality and a fart-like sound, I realized something else must be wrong. I turned it over and the speaker seemed like it was on an angle. I returned it and got another one. This one sounds great and is perfect for a small office. Fills the lows in perfectly with my studio monitor speakers. ... show more
Reviewed in the United States on June 6, 2022 by Jason Wood

Bought two within a week. These are fantastic for music lovers
If you are a music lover, have small speakers, and have a small room, you are going to love these subwoofers. I see "these subwoofers" in the plural because after you buy one, you will want two. That is what I did. I bought two of these subs in a week. In my home-office setup, these little subwoofers are the perfect compliment to my little Harbeth P3ESR speakers -- probably the best small bookshelf speakers money can buy. But like all small speakers, they cannot deliver on the low end. Two REL T/Zero subwoofers round things out completely. I could not be happier, particularly with the sale price. Now ... if you have a large room and/or are into home-theater explosions and lots of bass-driven drama, these little subs are not for you. These are for music. They disappear into the room, as good subwoofers should do. Music lovers will love these little gems. Well-done, REL. ... show more
Reviewed in the United States on March 17, 2022 by Steven P. Aggergaard

REL makes the best subs for music.
This thing integrates well with my Triangle Borea bookshelf speakers. The sounds is seamless. You can tell it's there other than the great wall of sound. REL is designed to work best with music. I'm running two tube amps, one to my speakers and one dedicated to the REL. The sound is incredible. Sub nit in pics, but that was the whole Idea of downsizing on space, but not the sound. ... show more
Reviewed in the United States on June 29, 2024 by Gadberry

Its Worth It
Costs a lot more than cheaper brands but it's worth it. No regrets. Perfect for my office system.
Reviewed in the United States on July 22, 2024 by mw51
Checking for best price...