Atlas Sound BIA100
Gimbal-Mount Bi-Axial Twin Reflex Air Column Horn without Driver


The Atlas Sound BIA-100 is the original reflex horn featuring a bi-axial design with twin air columns and exponential bell for wide-angle coverage with a linear frequency response.

The horn provides excellent acoustic loading maintained to a 350 Hz low-frequency roll-off and optimizes delivery of high and mid-range signal levels.

BIA-100 is designed for use with Atlas Sound PD Series compression drivers and models having 13/8" -18 male threads and 0.707" dia. throat openings.

The easily-mounted horn features the labor-saving patented gimbal-mount bracket assembly (U.S. Patent # 4,325,529) which allows for directional positioning up to 180° vertically and horizontally. It includes a steel bracket, cast-mounting base and provisions for flange installation.

The weather-resistant, non-glare matte black foam horn is resistant to resonance. Bracket assembly is finished in durable epoxy.

Atlas Sound BIA-100 Features:

  • Accepts All Atlas Sound and 1 3/8" - 18 Thread Compression Drivers with Throat Openings of 0.7" Dia.
  • High-Efficiency Bi-Axial Horn Provides 130° x 60°Wide-Angle Sound Coverage
  • Nominal Frequency Response of 350 Hz -8 kHz for High-Intelligibility Voice, Signaling and Full-Range Music in Indoor/Outdoor Applications
  • Patented 180° Gimbal-Mount for Installation Flexibility

Atlas Sound BIA-100 Specifications:

  • Dispersion: 130° x 60°
  • Height: 10-1/4" (26.035 cm)
  • Width: 21" (53.34 cm)
  • Depth: 19-1/4" (48.895 cm)
  • Shipping Weight: 16 lbs. (7.26 kg)
Add to Cart

We're sorry, only of this item available

Call a Sales Pro at for more information

Serving Contractors, Dealers, and Installers Since 1977

Contact: 1-800-828-0509 / Hours: Mon - Fri 7:00AM - 7:00PM