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The Monitor Audio C3L is a high-performance Tier 3 in-ceiling loudspeaker designed for high-end installations where superior acoustic performance is essential. Featuring a three-way configuration with a 9" RDT III bass driver, 4" IDC II midrange driver, and 1" IDC II tweeter with UD Waveguide II, the C3L delivers uncompromising clarity, deep bass, and exceptional dispersion—making it ideal for both premium music systems and immersive home cinema environments.
The C3L integrates Monitor Audio’s most advanced acoustic technologies within a precision-engineered chassis. The RDT III bass driver ensures deep, distortion-free bass, while the IDC II mid-pod array provides lifelike midrange and treble detail, delivering outstanding imaging. The tweeter, enhanced with UD Waveguide II, offers wide and consistent dispersion for uniform sound distribution. Installation is straightforward with the Quik-Link speaker connector and Tri-Grip II fixing system, while optional square and premium grilles provide versatile aesthetic choices.
| Specification | Details |
|---|---|
| System Format | 3–Way |
| Channels | 1 |
| Frequency Response (-6dB) | 45 Hz – 35 kHz |
| Nominal Impedance | 6 ohm |
| Minimum Impedance | 4.8 ohm @ 2 kHz |
| Sensitivity | 89 dB (2.83 Vrms @ 1m) |
| Maximum Peak SPL | 119 dB |
| Continuous Power Handling | 150 W RMS |
| Recommended Amplifier Power | 60 – 225 W RMS (into 8 ohm) |
| Drive Units | 1 x 9" RDT III bass driver 1 x 4" IDC II midrange driver 1 x 1" IDC II tweeter |
| Crossover Frequency | LF/MF: 700 Hz MF/HF: 3.5 kHz |
| Mounting Depth | 157 mm (6 3/16") |
| Cut-Out Hole Diameter | 248 mm (9 3/4") |
| External Dimensions | 278 x 278 x 161 mm (10 15/16" x 10 15/16" x 6 5/16") |
| Weight | 5 kg (11 lb) |
| Pre-Construction Bracket | CL-B |
| Cabinet Finish | Matte black, orange & green |
| Sold As | Single unit with CL-Round Grille (white) |
| Switches | Corner: On/Off HF: - / 0 / + MF: - / 0 / + |
| Warranty | Lifetime |
Engineered for uncompromising audio performance in large spaces, the C3L’s 9" RDT III bass driver produces impactful, distortion-free low frequencies, while the IDC II midrange and tweeter provide natural, detailed sound across vocals and instruments. Adjustable HF and MF switches, along with a corner placement switch, allow fine-tuning to suit a wide range of installation environments.
Q: How does the C3L compare to the C3M?
A: The C3L features a larger 9" bass driver for deeper bass and higher SPL handling compared to the 7" driver in the C3M, making it better suited for larger rooms.
Q: Is it suitable for home cinema use?
A: Yes. The C3L’s wide frequency response, high SPL capability and fine-tuning controls make it an excellent choice for immersive home theatre installations.
Q: Can the grille be customised?
A: Yes. The speaker comes with a paintable round grille, and optional square or premium grilles are available.
Q: What tuning options are available?
A: The C3L offers a corner switch, HF switch (-/0/+), and MF switch (-/0/+) to optimise performance depending on placement and room acoustics.
Q: What warranty does it include?
A: The C3L is backed by Monitor Audio’s lifetime warranty, ensuring long-term reliability and peace of mind.
