Triangle Solstice C3 is a 2-way Passive Sealed Center Channel speaker by Triangle. It was released in June 2026. Center channel speaker is an important component of a home theater system set-up as it delivers the listener significant part of the on-screen dialogue from your television. It features a 1" Horn-Loaded Tweeter and 2 x 6.5" Natural cellulose pulp Woofer.
The only sealed cabinet in the Solstice range - Triangle calls it a sealed-box centre, where the Voce Ez it replaces is ported. Two 16 cm natural cellulose pulp midwoofers flank the 25 mm magnesium-alloy horn tweeter, crossed at 2850 Hz. Triangle says a redesigned phase-alignment component saved 3 cm of height, bringing the cabinet down to 20.5 cm so it clears a television stand.
The speaker has a frequency range of 50-22k Hz and a sensitivity of 92 dB. Triangle Solstice C3 has an MSRP of 749$.
Room Size Suitability
The size of the room where you plan to use the Triangle Solstice C3 is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:
| Listening Environment* |
Suitability |
| Near-field | Poor |
| Small Room | Average |
| Mid-size Room | Good |
| Large Room | Average |
| Very Large Room | Poor |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)
Triangle replaced the older Voce Ez with this model. Follow the link to read our detailed comparison of these models:
Compare Triangle Solstice C3 vs Triangle Esprit Voce Ez
Triangle's Solstice Series of Loudspeakers
Solstice C3 is a member of Triangle's Solstice series of Passive speakers. Below you can see the main specs of these speakers.
Triangle Solstice Series Speakers
Frequency Response of the Triangle Solstice C3 Speaker
Triangle Solstice C3 has a Frequency response range of 50-22k Hz at ±3dB and Power Range of up to 120 watts.
Here we have a comparison of how Solstice C3's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
Center Channel Speakers
Crossover frequency of the Triangle Solstice C3?
The crossover frequency of the Solstice C3 is set to 2850Hz. This is the threshold frequency where the higher frequency signals over this level are sent to the tweeter and the lower-frequency signals are sent to the woofer by the crossover component.
Impedance and Sensitivity
Triangle Solstice C3's nominal impedance level is
8 ohms but can go down to as low as
4.5 ohms, and has a sensitivity of
92 dB.
Sensitivity
Center Channel Speakers
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Triangle Solstice C3 is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
92dB of the Triangle Solstice C3 is considered a high sensitivity compared to average stereo speaker which makes Solstice C3 an easy to drive from Sensitivity perspective. If you are planning to power your speaker with a Tube amp which are generally very low power, the Triangle Solstice C3 will be a good choice. Work out how loud the Triangle Solstice C3 plays in your room →
Minimum Impedance of the Triangle Solstice C3
Even though the nominal impedance of the Solstice C3 is 8 ohms, the minimum impedance level of this speaker according to Triangle is 4.5 ohms Triangle Solstice C3 so while choosing an amplifier, you should ideally check if the unit you are considering can provide this impedance level.
What amplifier does the Triangle Solstice C3 need?
At normal listening levels in a medium room, about
4.7–75 W
per channel into 8 ohms.
Set your own conditions and we will rank every amplifier we cover.
Prefer to browse? Integrated amplifiers under $750, or every amplifier we cover.
Input Type
Solstice C3 features type connectors.
Triangle Solstice C3 External Dimensions and Weight
Triangle Solstice C3 has external dimensions of (Height x Width x Depth) 8-1/16 x 21-1/4 x 12inch (205.0 x 540.0 x 305.0mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of Triangle Solstice C3 is approximately 1647.0cm2 / 255.3inch2.
Find speakers that fit your shelf or alcove →
WeightThe Triangle Solstice C3 weighs 11.75kg / 25.9lbs per piece. Here is a comparison of how Solstice C3's weight compares with the average, max and min weights in its class.
Weight
All Center Channel Speakers
Weight
Center Channel Speakers under $750
Cabinet type and Materials
Triangle Solstice C3 has a
Sealed type cabinet.
Available colors
Triangle Solstice C3 is available in Teak, Birch, Black Ash and White.
Does the Triangle Solstice C3 come with a Grille?
Solstice C3 comes with grilles. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible.
Recommended Accessories
Here is a list of accessories that we think you may need for the Triangle Solstice C3.
Official Product Page
Official manufacturer's product page for the Triangle Solstice C3 speaker can be found below:
Official Product Page for Triangle Solstice C3
Warranty
5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.