Triangle Solstice C3 teak

Reproducing a voice naturally remains one of the most delicate exercises in home cinema, where the slightest timbre shift reveals the transition from one speaker to another. The center speaker in the Solstice range meets this requirement through a precise set of choices: a sealed enclosure dedicated to dialogue, drivers and a tweeter shared with the other Solstice models, and crossover tuning aligned with that of the front speakers. Enough to keep a seamless front soundstage.

Sealed enclosure and voice intelligibility

The C3 is the only speaker in the Solstice range to adopt a sealed enclosure. Where the Solstice 3 and Solstice 8 breathe through a bass-reflex port, its cabinet remains airtight: the diaphragms work against a sealed air volume, which acts like a spring and controls bass movement. The result is evident in dialogue, where a deep voice or a muted effect remains intelligible, without overhang or added resonance. This enclosure goes a little less deep than a comparably sized ported system, with its response stopping around 50 Hz; the deepest frequencies of a soundtrack therefore go to the subwoofer. In return, the center speaker fits easily into a cabinet, with no rear port to leave clear behind it.

The TZ2540MG horn-loaded tweeter

A center speaker is rarely listened to on axis: viewers are spread out on either side of the sofa. The tweeter therefore matters as much for its dispersion as for its finesse. Triangle has housed its 25 mm aluminum-magnesium dome, a light and rigid alloy already used in its anniversary ranges, in a redesigned horn based on a waveguide called OS-SEW. This geometry distributes high frequencies more evenly to the sides, so voices retain the same texture for a listener seated directly in front of the screen as for their off-center neighbor. At the horn mouth, a “barrel”-shaped cutout fine-tunes the integration with the midrange, and a one-piece injected phase plug further evens out dispersion. Behind the dome, an absorptive chamber and a neodymium magnet motor reduce internal reflections and distortion.

Two cellulose pulp mid-woofers

On either side of the tweeter, two 16 cm drivers handle the midrange and upper bass. Their injected aluminum basket uses an open arch shape, designed to remain neutral and let air pass without turbulence, even at high volume. The diaphragm is made of natural cellulose pulp, a material Triangle has shaped since its beginnings for the warmth with which it reproduces voices. A redesigned rear-applied adhesive increases the diaphragm’s usable surface area and improves linearity in reproduction. This symmetrical layout, with two mid-woofers framing the treble, focuses energy toward the listening area and keeps dialogue firmly anchored at the center of the picture.

Tonal consistency with the Solstice range

The decisive argument for a dedicated center speaker lies in its kinship with the front speakers. The C3 uses the same tweeter and 16 cm drivers as the Solstice 3 and Solstice 8, and its crossover is set at 2.85 kHz, within a hair of the Solstice 3 bookshelf speaker’s 2.8 kHz, with the same slopes. Internal oxygen-free copper wiring and carefully chosen crossover components, air-core inductors and polyester capacitors, complete this family resemblance. In practical terms, a sound moving from the front left speaker to the center, then to the front right, keeps the same tonal character: a line of dialogue following an actor crossing the screen does not change timbre along the way. Pairing the C3 with front speakers from another background remains possible, but this integration loosens as soon as the drivers differ.

Cabinet construction that fades into the background

Placed under a screen, a center speaker often shares its support with the furniture holding it, and the slightest cabinet vibration can blur the message. Triangle has worked on the cabinet using high-density MDF panels, with rounded edges to limit diffraction at the borders. Inside, the DVAS system places an open brace in direct contact with the motor of each driver, via a damping material and a foam gasket: vibrations from the transducer are absorbed before reaching the walls. The 11.75 kg on the scale reflect this choice of inertia. At the rear, a simple high-conductivity terminal accepts the cable; it does not allow bi-wiring, reserved for the Solstice 8 in the range. All that remains is to find it a stable base: at 54 cm wide and with a plinth that brings the height to 23.5 cm, the center speaker requires a clear space under the TV.

Its place in a home theater setup

In a multichannel system, the center speaker carries almost all dialogue and a good share of the front effects; it is the one that locks voices to the screen, whatever seat is occupied in the room. The C3 handles Dolby Atmos and DTS:X soundtracks as well as older multichannel tracks, and remains the anchor point of the front stage as soon as height channels are added to envelop the listener. Its high sensitivity of 92 dB and easy impedance, a nominal 8 Ω that does not drop below 4.5 Ω, make it easy to drive: most AV receivers power it effortlessly. Ideally, it should be placed as close as possible to ear level, just below or above the picture.

Technical specifications

Acoustic configuration

• Type: sealed center speaker
• Number of ways: 2
• Tweeter: 25 mm aluminum / magnesium dome TZ2540MG
• Midrange / woofer drivers: 2 x 16 cm in cellulose pulp
• Single high-conductivity binding post

Performance

• Sensitivity: 92 dB
• Frequency response: 50 Hz – 22 kHz (+/-3 dB)
• Power handling: 120 W RMS
• Impedance
  • Nominal: 8 Ω
  • Minimum: 4.5 Ω

Exclusive technologies

• Sealed enclosure optimized for vocal reproduction
• New-generation horn-loaded tweeter
• High-precision crossover
• Drivers identical to the models in the Solstice range
• Perfect tonal consistency with the front speakers
• Reinforced low-resonance cabinet

Recommended use

• Home Cinema center channel
• Clear and intelligible dialogue reproduction
• Ideal for Dolby Atmos, DTS:X multichannel soundtracks and immersive formats
• Natural complement to the Solstice 3 and Solstice 8

Dimensions and weight

• Dimensions (W x H x D)
  • With base: 540 x 235 x 310 mm
  • Without base: 540 x 205 x 305 mm
• Weight: 11.75 kg