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12 inch 2-way Stadium Horn System 90° x 90°

This Model Has Been Replaced by AH99-12T-BSG (Color Change Only)


Atlas Sound model AH99-12ST "stadium horn" is ideal for directional sound distribution where full range reproduction, maximum intelligibility and high sound pressure levels are required.

Applications include football stadiums, sports arenas, baseball fields, convention centers and auditoriums.

Weather resistant construction features of the AH99-12ST 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 112" cast frame woofer. A "weep" hole is also included on the back of the large horn "bell" to allow evaporation of any condensation that might build up internally.


  • (3) Forged Eyebolts Also Included for Suspended Installation
  • 200 Watts Power Handling
  • Constant Directivity Design Offers Controlled Coverage of 90° Horizontal by 90° Vertical (2kHz Octave Band)
  • Driver Compliment Includes 12" Cast Frame Woofer with a Concentrically Mounted 1" Exit Compression Driver Coupled to a 90°H x 90°V HF Horn
  • Easy, Weather Resistant Connection via a Convenient Recessed Terminal Block Located on the Bottom of the Loudspeaker
  • Efficiency Rating of 103dB (1W/1m)
  • Heavy Duty Mounting Bracket (Included) Allows for Easy Installation to Most Any Flat Surface
  • Includes a Built-In, High Efficiency 60 Watt 70.7V Transformer
  • Maximum Output of 126dB (Rated Power @ 1M)


Power Taps 7.5, 15, 30, and 60 Watts & 8Ω
Driver Type 1" HF and 12" LF
Dispersion 90° x 90°
Power Rating 200 Watts
Sensitivity 103dB SPL (70Hz to 17kHz 1/3 octave bands)
Frequency Response 80Hz - 15kHz (±5dB)

Support Files

ATS003187_AH_PoleStar_Install_Parts_Guide ATS003187_AH_PoleStar_Install_Parts_Guide.pdf
AH_Brochure AH_Brochure.pdf
Polestar UniFrame Install and Parts Guide Polestar UniFrame Install and Parts Guide.pdf
ATS004338_AH_Series_LoudSpeakers_Install_Sheet ATS004338_AH_Series_LoudSpeakers_Install_Sheet.pdf