Model 850T is a wide-range, integrated horn and driver system with a single driver unit having two coaxial horns coupled to opposite sides of the driver diaphragm.

The folded construction of the rear horn coupled with the smaller dimensions of the front horn, present a 1,000 Hz acoustic crossover. This separation of frequencies provides a more extended high-frequency response and cleaner sound.

The 150° horizontal by 110° vertical dispersion pattern is beneficial in many applications requiring a wide coverage pattern. Furthermore, excellent loading is maintained to a low-frequency cutoff of 180 Hz.

Architects' and Engineers' Specifications

The loudspeaker shall be of the integrated driver and horn style, utilizing two coaxial horns coupled to opposite sides of the driver diaphragm and a larger horn compression molded from fiberglass, a zinc die-cast front horn and phenolic-constructed inner horns. The driver uses a high-temperature rated 5.2 cm (2.0-inch) diameter voice coil.

The axial frequency response will extend from 280 to 8,000 Hz and the horn shall exhibit a low frequency cutoff of 180 Hz. Sound pressure level will be 105 dB (1 W/1 M) with a 500 to 5,000 Hz pink noise signal applied, and the horn will produce a horizontal beamwidth of 150° and a vertical beamwidth of 110° at 2 kHz. The horizontal coverage shall be constant over the frequency range of 3 kHz to 10 kHz.

The loudspeaker shall be compression molded fiberglass capable of satisfactory mechanical performance in the temperature range from - 40°C to +40°C and not subject to sunlight embrittlement.

Other major external speaker parts shall be diecast zinc finished in gray polyester paint to match the molded horn parts. All components shall be resistant to damage from weather, moisture and fungus.

A swivel bracket capable of providing either vertical or horizontal installation and a variety of adjustments, is provided.

The loudspeaker shall be 52.0 cm (20.5 in.) high, 26.5 cm (10.5 in.) wide and 51.0 cm (20.0 in.) long. The loudspeaker shall be the 850T, which includes a 70-V transformer and weighs no more than 8.4 kg (19.0 lb).

• General Information
• • Manufacturer
  • The Bosch Group
  • Manufacturer Website Address
  • http://www.bosch.com
  • Brand Name
  • Electro-Voice
  • Product Type
  • Speaker