Assessments - 3, GPA: 3.3
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Applications include football stadiums, sports arenas, baseball fields, convention centers, and auditoriums. Weather resistant construction features of the AH66-12ST include a multiple screen configuration to prevent moisture from damaging internal components. A perforated aluminum screen covers the large horn mouth, a secondary screen is in place forward of the high frequency driver, and a third tightly perforated screen protects the 12" cast frame woofer. Installation A heavy-duty stainless steel "C" style mounting bracket is included with the AH66-12ST to allow easy mounting to most any flat surface. Three drop forge eyebolts are also pre-installed (2-front of horn plus 1-rear for "pull-up") for suspension mounting via load rated wire rope. (Use caution when suspending any object overhead. Refer to installation manual for more details). The AH66-12ST includes a weather resistant 7 pole terminal block connector on the underside of the speaker for ease of hook-up. This terminal block includes connection points for internal 70.7V transformer with taps settings of 7.5, 15, 30, and 60 watts and an 8 . connection for transformer bypass. 1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A. TELEPHONE: (800) 876-3333 FAX (800) 765-3435 AtlasSound.com 2/4 ©2008 Atlas Sound SL2-3034 ATS002874 RevA 1/08 Technical Specifications Power Rating: 200 watts Sensitivity 1 W / 1 M: 101 dB SPL (70 Hz – 17 kHz 1.3 octave bands) Frequency Responce: 80 Hz - 15 kHz (±5 dB) Dispersion: 65° x 65° Impedance: 8 . Nominal Transformer Taps: 7.5, 15, 30 &, 60 watts Height: 23.88” (606.55 mm) Width: 21.41” (543.81 mm) Depth: 22.57” (573.28 mm) Shipping Weight: 130 lbs (58.97 kg) Driver Type: 1” HF and 12” LF Architect & Engineer Specifications Loudspeaker shall be Atlas Sound Model AH66-12ST or approved equal. The loudspeaker system shall be a horn-loaded, 2-way design with a 12" paper cone and moisture resistant coating. The loudspeaker system shall include a 12”, horn loaded, cast frame woofer and an integral, concentrically mounted 1” exit compression driver coupled to a constant directivity high frequency horn. The three pole (18 dB/octave) dividing network shall have a crossover frequency of 1.8 kHz. The dividing network shall include a poly switch protection circuit for the high-frequency component. The loudspeaker system shall be capable of providing a sound dispersion angle of 65. horizontal by 65. vertical in the 2 kHz octave band. Rated power shall be 200 watts RMS based on EIA Standard RS-426B.* Enclosure shall be UV-resistant, low pressure injection molded fiberglass and shall include a 3 stage multiple mesh filter system for weather and rodent resistance: to include a 20-gauge perforated aluminum screen on front mouth assembly, a 100 x 100 weave stainless steel mesh between HF horn and HF driver and a 100 x 100 weave stainless steel mesh over 12” woofer. The loudspeaker shall include a stamped and formed, 2 mm stainless steel powder coated mounting bracket assembly for surface mounting and three M8 drop forged eyebolts for suspension mounting two at the front and one at the rear to allow the speaker system to be suspended and aimed using rated wire rope. Sensitivity shall be 101 dB SPL (80 Hz – 15 kHz in 1.3 octave bands) measured at a distance of 1 meter on axis with a 1 watt input half space (2.83V). Overall frequency response shall be 80 Hz – 15 kHz (±5 dB). The input section located on the bottom rear of the loudspeaker shall be via 7 position screw down terminal strip internally configured to allow input to an internally mounted 70.7 V transformer with 7.5, 15, 30, & 60 watt taps and a by-pass jumper for direct coupled to the speaker for nominal 8 . operation. The system connections shall be protected from the elements by a screw affixed weather resistant cover. Dimensions shall be: Height: 23.88” (606.55 mm) Width: 21.41” (543.81 mm) Depth: 22.57” (573.28 mm) Weight: 130 lbs (58.97 kg) * EIA test spectrum is applied for eight hours. (This procedure provides a rigorous test of both thermal and mechanical failure modes.) ............ ............ .................... ............ .................... .......... .......... 22.57" (573.28 mm) 14.65" (372.11 mm) 23.88" (606.55 mm) 18.46" (468.88 mm) 21.41" (543.81 mm) AH66-12ST Frequency Response 1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A. TELEPHONE: (800) 876-3333FAX (800) 765-3435AtlasSound.com3/4©2008 Atlas Sound SL2-3034 ATS002874 RevA 1/08 AH66-12ST Impedance (ohms) vs. Frequency AH66-12ST Horizontal Polars (Normalized To Zero On Axis) ( -6 dB) AH66-12ST Impedance (ohms) vs. Frequency AH66-12ST Horizontal Polars (Normalized To Zero On Axis) ( -6 dB) AH66-12ST Vertical Polars (Normalized To Zero On Axis) ( -6 dB) 1601 JACK MCKAY BLVD. ENNIS, TEXAS 75119 U.S.A. TELEPHONE: (800) 876-3333FAX (800) 765-3435AtlasSound.com4/4©2008 Atlas Sound SL2-3034 ATS002874 RevA 1/08 ...