Monitor Audio WSS430 Super Slim In-Wall Speaker
£475
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Sold asSingle
Impedance8Ω
Amp power10–120W
WarrantyLifetime
GrilleIncluded
Monitor Audio WSS430 Super Slim In-Wall Speaker
£475
£395.83 ex VAT
Order by 1pm Mon–Fri for same-day dispatch
Free tracked UK delivery · Next day £11.99
30-day returns · full manufacturer warranty
You'll need an amplifier
These are passive speakers, so they need an amplifier to power them (8Ω, 10–120W recommended). Either of these will drive a pair and stream music from your phone.
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.
The Monitor Audio WSS430 is the flagship model in the Super Slim in-wall range, bringing genuine high-fidelity performance to spaces where depth is at a premium. Designed for dedicated home cinema rooms, open-plan living areas and multi-room installations alike, it delivers a level of detail and power that belies its slender profile.
Why we like it
- Three dished C-CAM bass/mid drivers reduce distortion and improve rigidity for a cleaner, more controlled sound
- MPD high-frequency transducer, derived from Monitor Audio's Platinum II speakers, extends response beyond 50kHz with very low distortion
- Rotatable tweeter allows the speaker to be installed horizontally or vertically without compromising dispersion
- Magnetically attached, trim-less grille sits flush for an unobtrusive, paintable finish
- Tri-Grip dog leg fixings make for a secure, straightforward install in standard stud or masonry walls
Installation notes
With a cut-out of 346 x 101mm and a mounting depth of just 50mm, the WSS430 suits walls with limited cavity depth. Overall dimensions are 385 x 140.5mm, with a depth of 54.25mm including the grille. For best results, pair with an amplifier delivering between 10 and 120W, such as a Sonos Amp or a WiiM Amp, using a crossover around 100Hz for optimal bass performance.
Specifications
| Drivers | 3 x 3in C-CAM bass/mid, 1 x rotatable MPD tweeter |
| Frequency Response | 70Hz - 50kHz (-6dB) |
| Sensitivity | 87dB (1W@1M) |
| Impedance | 8 ohms |
| Power Handling | 75W RMS full range (120W with crossover) |
| Recommended Amplifier | 10-120W |
| Overall Dimensions | 385 x 140.5mm |
| Cut-Out Dimensions | 346 x 101mm |
| Mounting Depth | 50mm |
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 wall?
You'll need at least 50mm of depth behind the wall surface. 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 8Ω with 10–120W 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%.
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.
Is it sold singly or as a pair?
Priced per speaker. Add the quantity you need; most rooms use a pair.
When will it arrive?
Orders placed by 1pm Monday to Friday are dispatched the same day. Standard tracked delivery is £7.99, or free on orders over £50; next working day delivery is £11.99. Delivery details.
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.