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Martin Audio C4.8T 4" Ceiling Speaker

The C4.8T is the compact member of Martin Audio's Ceiling Series, a two-way flush-mount speaker built around a 4" carbon-fibre-loaded cone and a 0.8" dome tweeter. Its very wide 180-degree conical pattern is aimed at low ceilings, where a broad spread keeps coverage even without dense speaker spacing, making it a natural fit for retail, hospitality and background-music jobs.

It carries a built-in 70V/100V line transformer with tap settings from 3W to 25W, plus a 16-ohm low-impedance option, so it drops straight into a distributed system. It handles 40W AES (160W peak) and reaches 106dB peak, with a 178mm cut-out that suits standard ceiling tiles. Response runs 100Hz-20kHz.

Drivers4" (100mm) carbon-fibre cone + 0.8" (19mm) dome tweeter
Frequency Response100Hz-20kHz +/- 3dB
Power Handling40W AES, 160W peak
Transformer Taps100V: 25/12.5/6W; 70V: 25/12.5/6/3W; plus 16 ohm
Dispersion180 deg conical to 10kHz
Max SPL100dB continuous, 106dB peak
Cut-out178mm (7.01")
Dimensions205mm dia x 131mm deep, 2.6 kg