Ahuja ASC 20T 15 Watts Column Speaker

Ahuja ASC-20T Column Speaker

The Ahuja ASC-20T is a 15 W PA column speaker for 100 V line public address systems, designed for indoor and covered outdoor locations such as halls, auditoria and airport lounges. Two 6 x 4 inch drivers sit in a vertical array inside a slim aluminium cabinet, so the speaker projects a forward sound beam that covers a seated audience evenly instead of spraying sound at the ceiling and floor. A built-in 100 V line matching transformer with a rotary tap switch lets the installer set each speaker to the level its zone needs, which is what makes column speakers the standard choice for speech and background music in public buildings.

Key features

• 15 W RMS rated power, 23 W maximum, on a 100 V line
• Selectable power taps of 15 W, 10 W, 5 W and 2.5 W via rotary switch
• Two 6 x 4 inch drivers in a forward-radiating column array
• Weather resistant construction for use under roof eaves
• Aluminium extruded cabinet with die-cast aluminium covers
• Mounting clamps and hardware supplied in the box

Why a column suits speech

A column array radiates sound in a wide horizontal fan but a narrow vertical slice. In a hall or corridor that means more of the amplifier power reaches listeners and less of it bounces off hard ceilings and floors, where reflections smear announcements into echo. The ASC-20T produces 92 dB at 1 kHz with 1 W input measured at 1 m, and its 150 to 10,000 Hz frequency response covers the full intelligibility range of the human voice along with background music at moderate levels. Two drivers share the load, so a single column covers a small hall, classroom block or lounge without strain.

Built for indoor and covered outdoor duty

The cabinet is an aluminium extrusion with die-cast aluminium covers and a black aluminium mesh grille, finished in grey to sit quietly against institutional walls and pillars. A foam layer behind the grille protects the drivers from dust, and the weather resistant build allows the speaker to work under roof eaves where it is sheltered from direct rain. At 150 x 465 x 130 mm and 2.7 kg, one installer can handle the unit on a ladder, and the supplied mounting clamps and hardware fix it flat against the wall so the beam aims down the room.

Planning a 100 V line system

On a 100 V line, every speaker connects in parallel along one cable run and draws only the power set on its tap. Add the tap settings of all speakers on the run and keep the total within the amplifier rating, leaving headroom for peaks. Use the 15 W tap where the column works alone in a noisy space, and the 5 W or 2.5 W taps for corridors and waiting areas where announcements need clarity rather than volume. The rotary switch on the ASC-20T makes that adjustment a one-time setting at installation, with no rewiring when zones change.

Where it fits

Hotels, offices, malls, schools, hospitals and places of worship use speakers of this class for paging, announcements and background music across many rooms. The ASC-20T is the compact step in Ahuja’s ASC range, sized for smaller zones that sit alongside larger columns elsewhere in the same building, all driven from one central 100 V amplifier.

If a zone needs clear, even speech coverage without a bulky box speaker, the Ahuja ASC-20T delivers it in a slim grey column that installs once and runs for years on the line.