scm100

ATC public address drive units are the most reliable money can buy. It's a fact proven thoroughly by our own engineers at the development stage, and literally thousands of times since by our customers. But what makes the ATC PA drivers very special is that there has been no compromise on performance to make them as dependable as they are. Instead, we've concentrated on the most modern design, backed up by advanced manufacturing methods and the toughest quality control in the business.

Since it was formed in 1974, ATC's whole philosophy has been to provide quality and performance together. At prices you can afford. That's why ATC is now firmly established as one of the world's foremost manufacturers of professional quality loudspeakers.

The ATC drivers come as a range of four units - 9inch, 12inch, 15inch (3inch voice coil) and 15inch (4inch voice coil). Each uses sophisticated design principles to lower radically the distortion levels considered normal in other designs. ATC voice coils are formed of edgewise-wound copper ribbon wire, wound on an aluminium or kapton former. This structure, together with the use of new, improved adhesive technology and small coil-gap clearances, allows extremely high power handling capacity, with excellent reliability. The diaphragms of all ATC drivers are moulded using the most accurate process available, and are then treated and impregnated to add strength and damping. We build high acoustic performance, with reliability, into every one.

The suspension system of each model has been developed over hundreds of hours of maximum input running to optimise the unit for its particular application. Every ATC bass driver has a diecast chassis and a bolted ceramic magnet structure, with a symmetrical magnetic field, to maximise its efficiency and cut drive system distortion to a minimum. All metal magnet parts are plated black to improve the efficiency of heat dissipation from the voice coil; that's just one of literally dozens of details which give our products their well known dependability. Naturally, ATC offers a full technical service to customers, and all products are fully guaranteed. If you require any further information please contact ATC.

ATC SPECIFICATION - GENERAL NOTES.
Measured and calculated parameters in the attached specifications have been made in accordance with the recommendations of the Standards Association of Australia and IEEE Standards of the U.S.A.

References:
1. Australian Standard Specification No.1127 "Sound System Loudspeakers" Part 5.
2. USA - IEFE Specification Standard No.219-1975

1.POWER RATING
(A) NOMINAL POWER RATING = E2/Z Watts
Test Signal: Frequency weighted white noise.
Test Amplifier: The test amplifier used has a nominal power output capability of at least four times the nominal rated power of the loudspeaker.
Test Voltage: E is a true RMS voltage.

(B) MAXIMUM INPUT POWER = E2/Z Watts
Test Signal Sine wave
Test Frequency: The Frequency at which minimum impedance occurs above resonance.
Test Voltage: E is the true RMS voltage which may be applied to the loudspeaker continuously without thermal overload of the voice coil.

(C) MAXIMUM PROGRAM POWER
The power amplifier rating defined by nominal power rating test specified in (A).

2. Other standard Impedance values are available to special order.

APPLICATION NOTES
Each of the Loudspeakers specified has a specific range of applications. It is important that the following recommendations be considered when choosing an ATC loudspeaker.

  1. STD Speech and vocal amplification, Lower midrange in large PA, Electric guitar and Electric Piano.
  2. STD-LS Wedge monitors, Cabaret systems, Bass guitar, General purpose PA Bass in 2 way PA.
  4. BASS Bass guitar, Bass in 2 way PA Wedge monitors
  5. BASS-LC and BASS-LCR Bass guitar, Horn load bass in large PA Bass in side-fill monitors

Download Public Address Driver Unit specs (.zip)