Monitor Audio C3M 7" 3-Way In-Ceiling Speaker

Sold asSingle

Impedance6Ω

Amp power45–180W

WarrantyLifetime

GrilleIncluded

Monitor Audio C3M 7" 3-Way In-Ceiling Speaker

£649 £540.83 ex VAT

Request a quote

Monitor Audio Creator Series is sold by quotation. Choose your models and quantities, and we'll email you a quote with a secure link to pay online, normally within one working day.

Monitor Audio C3M 7" 3-Way In-Ceiling SpeakerC3M £649

Add other Creator Series models & fire hoods

In-ceiling speakers

C1L 9" In-Ceiling Speaker £349

C1M 7" In-Ceiling Speaker £299

C1S 5" In-Ceiling Speaker £249

C2L 9" In-Ceiling Speaker £449

C2L-CP 9" In-Ceiling Speaker £499

C2L-T2X 9" In-Ceiling Speaker £499

C2M 7" In-Ceiling Speaker £399

C2M-CP 7" In-Ceiling Speaker £449

C2M-T2X 7" In-Ceiling Speaker £449

C2S 5" In-Ceiling Speaker £349

C3L 9" In-Ceiling Speaker £749

C3L-CP 9" Three-Way In-Ceiling Speaker £850

In-wall speakers

W1M In-Wall Speaker £399

W1M-E 5" In-Wall Speaker £299

W2M 3-Way In-Wall Speaker £599

W2M-CP 5" Three-Way In-Wall Speaker £799

W3M In-Wall LCR Speaker £999

Speaker packages

Sonos Amp + 2x C2M Ceiling Speaker Package £1,359

Sonos Amp + 4x C1S Ceiling Speaker Package £1,549

WiiM Amp + 2x C2M Ceiling Speaker Package £1,099

WiiM Amp + 4x C1S Ceiling Speaker Package £1,279

Monitor Audio fire hoods

WL-FH Fire Hood for Large In-Wall Speakers £150

WM-FH Fire Hood for Medium In-Wall Speakers £120

CML-FH Fire Hood for Medium & Large In-Ceiling Speakers £75

CS-FH Fire Hood for Small In-Ceiling Speakers £65

Estimated total (inc VAT, before delivery and any multi-buy saving)£649

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Anything else? (room sizes, timescale, trade account)

Prefer to talk? Call 01284 634048 or email sales@ceiling-speakers.co.

You'll need an amplifier

These are passive speakers, so they need an amplifier to power them (6Ω, 45–180W recommended). Either of these will drive a pair and stream music from your phone.

Sonos AmpSonos app, AirPlay 2, TV connection £639 Add

WiiM AmpSpotify, Tidal, AirPlay 2, Chromecast £359 Add

Need a fire hood?

If the ceiling has a bedroom or other living space above it, or is part of an escape route, building regulations require each speaker to have a fire hood. Hoods also cut sound leaking into the room above.

Monitor Audio CML-FH Fire Hood for Medium & Large In-Ceiling Speakers

Monitor Audio CML-FH Fire HoodRecommended by the manufacturer £75 Add

HOODY 2 Ceiling Speaker Fire & Acoustic Hood for 8"-10" Speakers

HOODY 2 Fire & Acoustic HoodSame size, alternative £68 Add

Need speaker cable?

Allow about 10m per speaker for a typical run back to the amplifier. Webro 16/2 LSZH (low smoke, zero halogen) is the right cable for runs in ceilings and walls.

Webro 16/2 Speaker Cable2 Core 16AWG (1.31mm²) LSNH Violet

The Monitor Audio C3M is a premium three-way in-ceiling speaker designed for larger living spaces, home cinemas and dedicated listening rooms where sound quality cannot be compromised. Its sophisticated driver array brings genuine hi-fi performance to a flush-mounted ceiling format, making it a superb choice for anyone wanting serious audio without visible speakers.

Why we like it

Three-way design with dedicated bass, midrange and tweeter drivers delivers genuinely full-range sound
RDT III bass cone provides deep, controlled low end with low distortion
IDC II mid-pod array and UD Waveguide II tweeter ensure accurate imaging and wide, even dispersion
On-board Corner, HF and MF switches let installers tailor the sound to the room acoustics
Quik-Link connectors and Tri-Grip II fixings speed up installation and keep it secure long-term

Installation notes

The C3M requires a 212mm cut-out and a mounting depth of 148mm, so it's best suited to ceilings with adequate void space - check joist spacing before cutting. A pre-construction bracket (CM-B) is available for new-build projects. For amplification, pair with a dedicated multi-channel AV amp or a stereo power amp capable of delivering the recommended 45-180W RMS into 8 ohms; a Sonos Amp or WiiM Amp Pro will comfortably drive a pair in everyday listening, though dedicated hi-fi amplification will extract the most detail from this speaker's capability.

Specifications

System Format	3-Way
Frequency Response (-6dB)	45 Hz - 35 kHz
Nominal Impedance	6 ohm
Minimum Impedance	4.8 ohm @ 2 kHz
Sensitivity	87 dB (2.83Vrms @ 1m)
Maximum Peak SPL	116 dB
Continuous Power Handling	120W RMS
Recommended Amplifier Power	45-180W RMS (into 8 ohm)
Drive Units	1 x 7" RDT III bass, 1 x 4" IDC II midrange, 1 x 1" IDC II tweeter
Crossover Frequency	LF/MF: 800 Hz, MF/HF: 3.5 kHz
Mounting Depth	148mm
Cut-Out Diameter	212mm
External Dimensions	242 x 242 x 151mm
Weight	3.4kg

Questions we get asked

Does it come with a grille?

Yes. Every ceiling and in-wall speaker we sell comes with its grille in the box. Manufacturer photos often show the speaker with the grille removed so you can see the drivers, but the grille is always included.

Will it fit my ceiling?

You'll need a 212mm cut-out and at least 148mm of depth behind the ceiling surface. The visible trim is 242mm across. Standard plasterboard ceilings with joists are usually fine; check for pipes, cables and insulation before cutting. Not sure? Send us a photo or plan and we'll check it for you.

Do I need an amplifier?

Yes. These are passive speakers, so they need an amplifier or AV receiver to drive them. They're rated at 6Ω with 45–180W recommended amplifier power. For most rooms a Sonos Amp or WiiM Amp is ideal: each drives a pair and streams from your phone. You can also buy a package with the amp included and save 5%.

Do I need a fire hood?

If there's a habitable room above (for example a bedroom), or the ceiling forms part of a fire escape route, Building Regulations require each speaker to be fire-rated, usually with a fire hood fitted over the back. The hood that fits this speaker is shown above, next to Add to cart. Hoods also cut sound travelling to the room above. See all fire hoods.

How many speakers do I need?

As a rule of thumb: a pair for most bedrooms, kitchens and living rooms up to about 20m², two pairs for large open-plan spaces, and a single stereo speaker (T2 / stereo models) for small rooms like en-suites. For home cinema, use 5 or 7 speakers plus a subwoofer. Our free design service will plan positions and sizes from your floorplan.

Can I return it?

Yes. Unused items can be returned within 30 days of delivery, and every product carries the full manufacturer warranty. Returns & warranty.