OPTIMUS, the leading Spanish company in the design, manufacture and distribution of public address (PA), voice alarm (VA) and intercom equipment.
The A-228EN model is an 8" ceiling loudspeaker with a metal fire dome and a frameless metal grill. The maximum power is 20 W RMS, with connections for 10 and 5 W by means of a strip. Due to its high sensitivity, it achieves a high maximum sound pressure (SPL) of more than 110 dB.
Internally, the loudspeaker is impregnated with an anti-humidity treatment and the set has IP21C protection against safety risks and environmental influences. Installation is quick and easy, using spring clamps with protective anti-vibration caps and WAGO 221 connectors. The A-228EN model is certified according to EN 54-24 and is part of the range of sound points offered by OPTIMUS for public address and voice alarms systems where EN 54 safety standard must be fulfilled..


Ceiling speaker, 8", 20 W RMS (20, 10 & 5 W), 100 V, 240 mm Ø. Metal back cover. VA (EN54)

    • 20 W RMS power with 5, 10 and 20 W taps
    • Metallic fire cover
    • White frameless grille RAL 9016
    • SPL 20 W, 1 m & 1 kHz > 110 dB
    • EN 54-24 certification


{tab Technical description}

20 W RMS power 8” ceiling loudspeaker, 100V line, with frameless metal grille and metal back cover. Quick installation using spring clamps with protective caps for vibrating damping and WAGO 221 connectors. Frequency response 50 ~ 18.900 Hz. Sensitivity 97.2 dB SPL (1 W, 1 m) and maximum SPL 110,3 dB. Dimensions Ø 265 x 115 (depth). Cutout size Ø 240 mm. Weight 1.6 kg. EN 54-24 certification. OPTIMUS model ref. A-228EN.

{tab Specifications}

Rated power (RMS)
Power taps 100V
Sound pressure
Sensitivity EN 54-24
Frequency response
Cutout size
Dimensions (mm)
Power selection
Protection degree
20 W
20, 10 & 5 W
500 Ω, 1kΩ & 2kΩ
97,2 dB SPL at 1 W, 1 m. IEC268-5
110,2 dB SPL at 20 W, 1 m. IEC268-5
85,2 dB SPL a 1 W, 4 m
50 ~ 18.900 Hz
Ø 240 mm
Ø 265 x 115 (depth)
1.60 kg
Metallic, housing & frame
White RAL 9016
Spring clamps


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