Ahuja ASC 40T Speakers

Ahuja ASC-40T PA Column Speaker

The Ahuja ASC-40T is a PA column speaker for 100 volt line public address systems, rated at 30 W RMS with a maximum of 45 W. Four 6 inch by 4 inch drivers are arranged in a vertical column inside an aluminium extruded cabinet, producing the forward-radiating beam that column speakers are chosen for. A built-in 100 V line matching transformer with a rotary tap switch offers 30, 20, 10 and 5 watt settings, so the output of each speaker can be matched to the area it covers. Ahuja positions the ASC-40T for indoor and outdoor applications such as halls, auditoria and airport lounges.

Key features

• 30 W RMS power rating, 45 W maximum, on a 100 V line
• Four 6 inch by 4 inch drivers in a column array
• Power taps of 30, 20, 10 and 5 W selected by rotary switch
• Frequency response of 150 Hz to 10,000 Hz, 95 dB sensitivity
• Aluminium extruded cabinet with die-cast aluminium covers
• Weather resistant design for use under roof eaves
• Foam layer protects the drivers from dust
• Mounting clamps and hardware supplied

Why a column array

Stacking four drivers in a tall, narrow column shapes the sound into a beam that travels forward toward the audience instead of spreading equally in every direction. In halls and other reverberant spaces that matters: less energy bounces off the ceiling and floor, so more of the direct sound reaches the listeners and speech stays intelligible. This is exactly the job the ASC-40T was designed for, covering rows of seated listeners in auditoria, places of worship, waiting areas and lounges with even, forward-projected announcements and background music. Its 150 Hz to 10,000 Hz response is centred on the speech band, and the 95 dB sensitivity at 1 watt and 1 metre means modest tap settings still produce useful levels.

100 V line working and power taps

On a 100 V line system, many speakers connect to a single amplifier over long cable runs, and each speaker draws only the power its transformer tap is set to. The ASC-40T rotary switch gives four choices, from the full 30 W down to 5 W, so an installer can run speakers in a large hall at a higher tap and units in a quiet corridor or office at a lower one, all from the same line. When planning a system, add the tap settings of every speaker on the line and keep the total within the amplifier rating, with headroom to spare. Tap changes are made at the speaker with the system switched off.

Cabinet, weather resistance and installation

The cabinet is aluminium extrusion with die-cast aluminium covers and a black aluminium mesh grille, in a grey column format for indoor and outdoor applications. Ahuja describes the speaker as weather resistant for use under roof eaves, and a foam layer behind the grille protects the drivers from dust, a sensible provision for transport hubs and semi-outdoor locations. At 150 by 910 by 130 mm and 5.1 kg, the column mounts vertically on a wall using the clamps and hardware supplied, presenting a slim profile that sits neatly beside a stage, screen or notice area.

For venues that need clear, controlled speech coverage on a standard 100 V line, the ASC-40T combines a proven four-driver column layout, flexible power tapping and a weather resistant aluminium cabinet in one straightforward unit.