A-254ATM
CEILING SPEAKER
OPTIMUS 4” ceiling loudspeaker with 6 W power rating, and an intermediate power setting of 3 W.
Sensitivity of 90 dB (1 W, 1 m and 1 kHz) and maximum acoustic pressure of 98 dB (SPL) at 1 kHz, 1 m.
Frequency response from 110 to 15.000 Hz.
Quick spring-type embedding mounting system. Finishing in white metal (RAL 9016).

Loudspeaker 4''
R.M.S. power 6 W
Impedance 100 V line 1k7 Ohm, 3k3 Ohm, 6 W & 3 W
Sensitivity (1 kHz) (SPL) 90 dB (1 W, 1 m)
Sound pressure level (1 kHz) (SPL) 98 dB (1 W, 1 m)
Frequency response 110 ~ 15.000 Hz
Embedding hole Fi 155 mm
Dimensions (mm) Fi 180 x 50 (depth)
Weight 0,7 Kg
Finishing Metal
Colour White (RAL 9016)
Accessories Spring-type mounting system
Power selection Transformer terminal block