Triangle Solstice C3 ash black

Reproducing a voice naturally remains one of the most delicate exercises in home cinema, where the slightest shift in timbre 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.

The sealed enclosure and voice intelligibility

The C3 is the only model 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 an enclosed volume of air, 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 reaches a little less deep than a similarly sized ported system, with its response stopping around 50 Hz; the deepest frequencies of a soundtrack therefore fall to the subwoofer. In return, the center speaker fits easily into a cabinet, with no port to clear behind it.

The TZ2540MG horn 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 in front of the screen as for a neighbor sitting off-center. At the mouth of the horn, a “barrel”-shaped cutout adjusts the match with the midrange, and a one-piece injected phase plug further evens out dispersion. Behind the dome, an absorbing chamber and a neodymium magnet motor limit internal reflections and distortion.

Two cellulose pulp mid-bass drivers

On either side of the tweeter, two 16 cm drivers handle the midrange and upper bass. Their injected aluminum basket adopts an open arch shape, designed to remain neutral and let air pass without turbulence, even at high levels. The cone is made of natural cellulose pulp, a material Triangle has shaped since its beginnings for the way it reproduces voices with warmth. A redesigned rear-applied bonding process increases the cone’s usable surface area and improves linearity in reproduction. This symmetrical arrangement, with two mid-bass drivers 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 tweeter and 16 cm drivers from the Solstice 3 and Solstice 8, and its crossover point is set at 2.85 kHz, a hair away from the Solstice 3 bookshelf’s 2.8 kHz, with the same slopes. Internal oxygen-free copper wiring and carefully selected 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: dialogue following an actor crossing the screen does not change timbre along the way. Pairing the C3 with front speakers from a different origin remains possible, but this matching loosens as soon as the drivers differ.

Cabinetry that disappears from notice

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 cabinetry using high-density MDF panels, with rounded edges to limit diffraction at the sides. Inside, the DVAS system places an open brace in direct contact with the motor of each driver, through a damping material and a foam gasket: vibrations from the transducer are absorbed before reaching the panels. The 11.75 kg on the scale reflects this choice for 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. It still needs a stable base: at 54 cm wide and with a plinth that brings the height to 23.5 cm, the center speaker requires open space under the television.

Its place in a home cinema setup

In a multichannel system, the center speaker carries nearly all dialogue and a good share of the front effects; it is what anchors 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 soundstage 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 amplifiers control 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 those 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, and immersive format multichannel soundtracks
• 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