Triangle Thetis 300
Just Okay
Sound Quality
77/100
Integration
68/100
Build Quality
80/100
Features Connectivity
82/100
Value for Money
62/100
Compact yet purposeful, Triangle Thetis 300 targets room-friendly bass with a 20cm woofer, 150W Class D power and bass-reflex extension to 32Hz. Its adjustable crossover, volume control, LFE, RCA and high-level inputs make system matching straightforward, while the included IR remote adds everyday convenience. A neatly specified subwoofer for flexible, controlled low-end support.
Pros
Flexible connection and tuning options include LFE, RCA and high-level inputs, plus adjustable crossover and volume controls.
WATT RECOMMENDS
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SOUND QUALITY PERFORMANCE 77/100
Bass
78/100
Based on the spec'd 20 cm driver in a bass-reflex cabinet and a specified bandwidth down to 32 Hz, expected extension and output are good for a compact 8"-class sub but not reference-level. No reviewer measurements provided, so score reflects likely real-world performance given size and 150 W amp power.
Dynamics
74/100
150 W Class D power and a compact sealed/ported design imply reasonable transient response and headroom for room-facing nearfield use. Without listening reports or measurements, dynamics are rated conservatively above average for this size.
Assessments of Build Quality, Usability, and Overall Propositions.
Integration
68/100
No review outcome language available about how it 'disappears' or blends with speakers. Spec list (crossover knob, volume, high-level input, LFE) supports easy tuning, but Features ≠ Integration; add outcome evidence or lower Integration.
Build Quality
80/100
Triangle is known for solid finishes; the unit's 10.6 kg mass and compact dimensions suggest a well-built cabinet and driver for its class. No review comments provided to confirm long-term durability.
Features Connectivity
82/100
Includes LFE, RCA, high-level input, crossover knob, volume knob and IR remote — comprehensive physical controls and connections for flexible placement and tuning. Passive baseline applied (no app/room EQ reported).
Value for Money
62/100
At the listed price (~749), the Thetis 300 is relatively expensive for a compact 20 cm driver subwoofer; without review praise calling it a 'no-brainer' or 'best in class,' value is modest. Lack of review-based performance endorsement lowers value score.
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Specifications
- Speaker use
- Power : 150 Watts RMS Class D Audio Input : • 1 x LFE • 1 x RCA • 1 x High Level Input • Crossover knob • Volume knob
- Speaker Specifications
- • Type subwoofer : Bass Reflex • Bandwidth : 32 - 120 Hz
- Driver Informations
- 1 Driver : • 1 x 20cm Woofer
- Weight & Dimensions
- Subwoofer Dimensions (per unit) : • Width : 300 mm • Height : 340 mm • Depth : 300 mm Box Dimensions (W x H x D): 390 x 422 x 390 mm Weight • Net weight : 10,6 kg • Gross weight : 12,1 kg
- Accessories
- • Power cable • IR remote control
Manufacturer's Description — Triangle
Subwoofer - Thetis 300
The Thetis 300 subwoofer is the essential part of your home theater set-up. Versatile, it will also be an ideal addition to your stereo system, for example to accompany smaller speakers. Equipped with a 20cm, downward-facing driver and an amplifier of 150W, this subwoofer in a compact format allows your set-up to considerably extend the bandwidth in the low frequencies. Using a bass-reflex principle, it keeps a limited volume while offering surprising performance.
The Thetis subwoofers feature numerous inputs, allowing them to be associated with all types of amplifiers. They include a direct LFE input, standard RCA, and high-level inputs for amplifiers with no suitable output. You can adjust the volume, the phase, and the frequency roll-off for a perfect fit with your main speakers.
Each Thetis subwoofer is supplied with a remote, an LED display on the front panel providing visibility of the sound setting.
It features an automatic power ON. Automatic STANDBY is also possible by activating the AUTO function of the subwoofer.
BASS-REFLEX CONFIGURATION
The Thétis 340 and 300 operate using a bass-reflex principle, extending their bandwidths even at low volume.
With a laminar port, airflow noise is significantly reduced compared to a classic tubular port.
SUCCESSFUL DESIGN
The transducers use composite membranes made of cellulose and carbon, that ensure high rigidity. Combined with oversized engines and controlled suspensions, the speakers have excellent power handling, reproducing all types of dynamics without any difficulty.
Equipped with the latest generation of Class-D amplifiers, the Thétis 340 & 300 respectively have a power of 250W/150W RMS, with a 400W/250W peak power. With steep crossover slopes, matching the Thétis subwoofers to your main speakers is easy.
The design of the cabinets is the result of a thorough vibrations study, conferring the Thétis 340 and 300 a remarkable sound.
PROVEN COMPATIBILITY
The Thétis subwoofers feature numerous inputs, allowing them to be associated with all types of amplifiers. They include a direct LFE input for home theater set-ups, the settings will then be made from your dedicated amplifier. They also feature standard RCA inputs for Hi-Fi set-ups, and high-level inputs for amplifiers with no suitable output.
You can manually adjust the volume, the phase, and the frequency roll-off for a perfect fit with your main speakers.
COMFORT OF USE
The Thétis subwoofers include a remote control for volume and standby. An LED display on the front panel provides visibility of the sound setting.
To save energy, an automatic standby is enabled after 20 minutes if there is no signal. As soon as a new signal is received, the subwoofer is automatically reactivated.
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- Acton Gate Audio — online and in-store — Cymru, United Kingdom (website)
- Adorama — in-store — New York, New York, United States (website)
- Alta Fedelta — online and in-store — Lombardia, Italy (website)
- Altitudo Audio — online and in-store — Winnipeg, Manitoba, Canada (website)
- AMPL’HIFI — online and in-store — Nîmes, Occitanie, France (website)
- Arctic Audio — in-store — Fargo, North Dakota, United States (website)
- Aris Audio — in-store — Salt Lake City, Utah, United States (website)
- Audio Antiquary — online — Italy (website)
- Audio Art Cable — online and in-store — San Diego, California, United States (website)
- Audio Evolution — online and in-store — Volla, Campania, Italy (website)
and 83 more verified dealers