OWNER’S GUIDE MODEL A12 A-SERIES ENVIRONMENT-PROOF HIGH-OUTPUT/LONG-THROW LOUDSPEAKER © 2008 Bogen Communications, Inc. Specifications subject to change without notice.
PACKAGE CONTENTS Near A12 Speaker (1) Mounting Knobs (2) Yoke (1) Rubber Friction Disk (2) Safety Attachment Bolt (1) Owner’s Guide (1) SPEAKER ORIENTATION RIGHT WRONG The NEAR A12 is acoustically designed to operate in a vertical orientation with the NEAR logo right side up. This orientation will provide 90 degrees of horizontal coverage and 45 degrees of vertical coverage. RIGHT WRONG The A12 is a ported speaker, designed to shed water, and includes a unique water-repellent scrim.
YOKE INSTALLATION WALL MOUNT 90° WALL/CEILING MOUNT (Secure both ends) After selecting the speaker location, securely attach the yoke to the surface. An Adjustable Tilt-Mount Adapter (TMA812) is available to provide various tilt angles. The TMA812 allows attachment to walls and posts. WARNING: Mounting brackets must be secured in accordance with local codes. If in doubt, consult a professional contractor to determine the integrity of the structure to which the bracket will be attached.
UNDERPOWERING VS. OVERPOWERING Surprisingly, speaker damage can be caused by amplifiers with too little power. An underpowered, overdriven amp sends heavily distorted, clipped audio to the speakers. This can damage the high-frequency drivers. Clipping is usually audible; it may vary from a harsh sound to a fuzzy or blurry sound. If you hear clipping at loud volume levels, turn down the volume until the distortion is no longer present.
70V SYSTEM CONFIGURATION When designing a 70V system, the total of all the power tap settings of all the connected speakers cannot exceed the output power of the 70V amplifier. The example below shows five speakers connected in parallel. Using the 16W terminals, an amplifier is needed with a power rating of at least (5) × (16) = 80W. A good rule of thumb is to select an amplifier with 20% more power; in this case, an amplifier that delivers about 100W.
Example of Low-Impedance System Configuration AMPLIFIER WITH DUAL 4 16 16 16 OUTPUTS 16 16 16 16 16 4 SPEAKERS PER CHANNEL CONNECTED IN PARALLEL Note: Jumper stored for safekeeping _ From amp _ + To next speaker + Jumper has been removed Total load impedance can be calculated this way: 1 (1/Rs + 1/Rs ... 1/Rs) = Total Load Impedance Rs is the impedance of the speaker, for the A12 it is equal to 16 ohms.
SPECIFICATIONS A12 Frequency Response (-10 dB)* 55 Hz to 17.5 kHz LF Driver Dual Metal-Composite 6-1/2" Cone Woofers, Patented MLS Voice Coil Guidance System HF Driver Weatherproof 1.9" Mylar Diaphragm Constant Directivity Horn, 1" Exit Sensitivity (1W/1M) 94.5 dBspl Dispersion 90° Horizontal, 45° Vertical Impedance Ratings Low (16 ohms) / High (70V) Power Input (Max.
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