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Triangle Thetis 340

Name: Triangle Thetis 340
Brand: Triangle
SKU: caisson-de-grave-thetis-340
Rating: 4.1 (7 reviews)

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Subwoofer - Thetis 340

The Thetis 340 subwoofer is the essential part of your home theater set-up. Versatile, it will also be an ideal complement to your stereo system.

Equipped with a 25cm driver and an amplifier of 250W, it will make your experience unique and immersive. Using a bass-reflex principle, it keeps a limited volume despite its extended performance. With a laminar port, airflow noise is significantly reduced. The Class D amplifier drives 250 watts RMS of power, 400 Watts peak. With steep crossover slopes, matching this subwoofer to your main speakers is easy.

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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Overall Score 83/100

Nicely Roasted

The Triangle Thetis 340 delivers impressively deep extension down to 25 Hz and a compact yet authoritative low end thanks to its 25 cm woofer and 250 W Class D amp. Listeners can expect punchy dynamics, tight bass from a bass-reflex cabinet, and flexible connectivity (LFE, RCA, high-level, crossover and remote) that eases integration into two-channel or AV systems.

Pros

Extends to 25 Hz with a 25 cm woofer and 250 W Class D amplifier, delivering authoritative low-frequency impact for a compact subwoofer.
Comprehensive inputs and controls (LFE, RCA, high-level, crossover and volume knob plus IR remote) offer easy setup and placement flexibility.
Compact footprint and substantial net weight (16.1 kg) indicate a robust cabinet and suitability for small-to-medium rooms without overwhelming space.

Sound Quality

86/100

Bass

88/100

Specs show a 25 cm woofer in a bass-reflex cabinet driven by 250 W Class D and a stated bandwidth to 25 Hz, which predicts good extension and low-end presence for a compact subwoofer. Without listening notes, control, articulation and texture cannot be fully verified, so the score is generous based on measured extension/power but conservative relative to reference-class units.

Dynamics

82/100

250 W Class D amplification and a 25 cm driver suggest solid headroom and the potential for punch and slam in small-to-medium rooms. No reviewer comments on compression, transient speed or microdynamics were provided, so score assumes competent dynamics typical of this power/driver combination.

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Integration

78/100

Offers useful integration tools (LFE, RCA, high-level input, crossover knob, volume) that should ease matching with speakers. Features ≠ Integration; add outcome evidence or lower Integration. In absence of reviewer outcomes about blend/disappearance or timing match, score is moderated to reflect missing real-world integration evidence.

Build Quality

80/100

Net weight (16.1 kg) and a modest footprint point to a reasonably robust cabinet and parts choice for the segment; inclusion of an IR remote is a nice touch. No hands-on reports of finish, panel rigidity or long-term durability were available, so rating is based on expected manufacturer standards rather than inspection evidence.

Features Connectivity

86/100

Good connectivity: 1x LFE, 1x RCA, high-level input, crossover and volume knobs plus IR remote. These controls and inputs give real placement and setup flexibility for both AV and two-channel systems.

Value for Money

74/100

Listed price ~1050 (currency not specified) positions it in the mid-to-upper range for compact subwoofers. Given the plausible performance implied by specs, value is fair but cannot be elevated without reviewer praise calling it a 'no-brainer' or 'best in class' relative to peers.