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REL Acoustics

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 68 reviews
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Availability: Only 10 left in stock, order soon!
Fulfilled by Amazon
Arrives Saturday, Jun 6
Order within 9 hours and 1 minute
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Features

  • 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.
  • SEALED SUBWOOFER DESIGN: Features a down-firing 6.5" driver powered by a 100-watt Class D amplifier for tight, controlled bass.
  • CONNECTION OPTIONS FOR MUSIC AND MOVIES: Simultaneously connect for Music and Theatre. Use the included high-level speaker wire for music and connect via a single RCA cable (not included) to your subwoofer output for movies.

Brand: REL Acoustics


Speaker Maximum Output Power: 100 Watts


Frequency Response: 37 Hz


Connectivity Technology: RCA


Audio Output Mode: Stereo


Audio Output Mode: Stereo


Mounting Type: Floor Standing


Enclosure Material: Steel (steel)


Speaker Type: Subwoofer


Additional Features: Bass Boost


Antenna Location: For Surround Sound Systems


Subwoofer Diameter: 6.5 Inches


Color: High Gloss Black


Is Waterproof: FALSE


Warranty Type: Limited


Control Method: Remote


Speaker Size: 6.5 Inches


Woofer Diameter: 6.5 Inches


Tweeter Diameter: 1 Inches


Water Resistance Level: Not Water Resistant


Specific Uses For Product: Home Entertainment Systems


Processor Count: 1


MP3 player: No


Battery Average Life: 5 Hours


Controller Type: Corded Electric


Unit Count: 1.0 Count


Item Dimensions D x W x H: 8.5"D x 10.5"W x 9.5"H


Item Weight: 15 Pounds


Compatible Devices: Desktop, Laptop, Projector, Television


Compatible with Vehicle Type: Car


Audio Driver Type: Dynamic Driver


Audio Driver Size: 6.5 Inches


Number Of Circuits: 1


Brand: REL Acoustics


Model Number: MKIII


Model Name: MKIII


Built-In Media: 10 meter high level cable with Neutrik Speakon Connector, User manual and power cord


Number of Items: 2


Customer Package Type: Standard Packaging


Series Number: 3


UPC: 857316005492


Manufacturer: REL Acoustics


Age Range Description: Adult


Speaker Maximum Output Power: 100 Watts


Number of Power Levels: 1


Frequency Response: 37 Hz


Number of Audio Channels: 5.1


Connectivity Technology: RCA


Wireless Technology: Bluetooth


Subwoofer Connectivity Technology: Wired


Connectivity Protocol: Bluetooth


Power Source: Corded Electric


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jun 6

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.

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Top Amazon Reviews

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • REL makes the best subs for music. REL makes the best subs for music.
Review Image by Gadberry
Review Image by Gadberry
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 Reviewed in the United States on June 29, 2024 by Gadberry
    • The subwoofer for a desktop setup or small rooms!
The subwoofer for a desktop setup or small rooms! It is that good that I bought two for a stereo system.l I have a 100 years older wood floors so since the driver of this subs fires down I had too much rattling so I place them on speaker stands at the same highs of the speakers and I’m amazed!!! Get them! The blue quality is above anything in the size… anything. ... show more
Reviewed in the United States on June 10, 2021 by Rod

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