REL Acoustics
REL Acoustics Subwoofer Tzero MKIII
Best compact subwoofer for enhancing bass in smaller living spaces.
The REL Acoustics Tzero MKIII Subwoofer is a compact powerhouse designed to elevate modest audio systems with deep, natural bass. Ideal for apartments, home offices, or studios, it features an all-new aluminum-cone driver and a 100-watt Class D amplifier for impressive output. Its signature High Level Input and separate .1/LFE input ensure seamless integration and perfect audio levels for both music and home theater. Experience a full-bodied low-end that complements your existing speakers without overpowering smaller spaces.
$550.00
Owner Satisfaction
4.7
/ 5
Category Rank
578
/ 8447
#578 in Speakers
Price vs Category Average
-62%
Below average
Type
Closed Box, Down-firing Driver
/ Closed Box, Down-firing Driver
Who it's for
- Audiophiles seeking seamless musical integration with their main speakers
- Apartment dwellers needing high-end sound in a compact footprint
- Critical listeners prioritizing fast, detailed bass response
Who should skip it
- Beginners intimidated by high-level amplifier wiring requirements
- Home theater enthusiasts requiring deep, seismic low-end impact
- Budget-conscious buyers looking for raw power per dollar
Performance breakdown
Space Efficiency
Compact footprint fits effortlessly into tight apartments and home offices.
System Integration
Signature High Level Input ensures seamless blending with existing stereo speakers.
Bass Precision
Aluminum-cone driver delivers tight, controlled low-end without muddying the soundstage.
Power Output
100-watt Class D amplifier provides ample punch for smaller listening environments.
Build Quality
Solid steel chassis construction feels premium and built for long-term reliability.
Setup Versatility
Separate LFE and high-level controls allow for precise home theater calibration.
Key Specs
Type
Closed Box, Down-firing Driver
Active Driver Size & Material
6.5in., 165mm Long-throw, Steel Chassis
Low-Frequency Extention
37 Hz at -6 dB in room
Input Connectors
High Level Neutrik Speakon, Low Level Single RCA, LFE RCA
Input Impedance
High-Level: 150k Ohms, Low Level: 10k Ohms, .1/LFE: 10k Ohms
Power Output
100 Watts RMS
Amplifier Type
Class D
Dimensions
8.5 x 9.5 x 10.5 In. (216 x 241 x 260 mm)
Features
- Compact design for smaller spaces
- All-new aluminum-cone driver
- Powerful 100W Class D amplifier
- High Level Input for system integration
- Separate .1/LFE input with volume control
- REL-D circuit for digital amp compatibility
- Precise, stepped crossover adjustments
- Phase switch for optimal integration
What customers say
The REL Acoustics Subwoofer Tzero MKIII earns high praise for its exceptional acoustic performance, particularly its ability to deliver fast, tight, and musical bass that integrates seamlessly with main speakers. Users consistently highlight the superior sonic coherence achieved through the high level input connectivity, making it ideal for critical listening and smaller spaces. While the premium price is noted, satisfied customers overwhelmingly agree that the sophisticated texture and quality of the bass fully justify the investment. The build quality and design also reinforce its status as a premium audio component, leading to strong long-term satisfaction among audiophiles.
Know before you buy
The Tzero MKIII is specifically engineered for smaller spaces like apartments, home offices, or studios. While it provides impressive output for its size, it is best suited for intimate listening environments rather than large, open-concept living areas.
The High Level Input connects directly to your amplifier's speaker terminals, allowing the subwoofer to receive the exact same signal as your main speakers. This ensures the bass character perfectly matches your speakers, resulting in a more seamless and natural integration.
Yes. The Tzero MKIII features separate inputs for High Level and .1/LFE, allowing you to keep both your music and home theater systems connected at once. You can set individual volume levels for each, ensuring the bass is balanced for both stereo music and movie soundtracks.
Because the driver is down-firing, the subwoofer is less sensitive to room positioning than front-firing models. It works well on most solid floor surfaces, though placing it on a hard, level surface will provide the most consistent and tight bass response.
Yes, the Tzero MKIII utilizes REL’s proprietary REL-D circuit, which is specifically designed to ensure stable and high-quality performance when paired with modern Class D digital amplifiers.
The Tzero MKIII offers a low-frequency extension of 37 Hz at -6 dB in-room. While it won't shake the floor with deep sub-bass like a massive 12-inch unit, it provides a full, articulate bottom end that significantly enhances the scale of smaller speaker systems.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$550