Electro Voice Interface Alpha specifications

Category : Speakers

General

Tech nical data

Special equipment

(power supply of the equalizer but 220V instead of 110/120V)

  • Manufacturer: Electro Voice
  • Model: Interface Alpha
  • Years of construction: approx. 1981-1982
  • Manufactured in: Nidau/Switzerland
  • Color: Walnut or oak veneer
  • Dimensions: 625 x 390 x 210 mm (HxWxD)
  • Weight: 14 kg
  • Factory price approx.: 1950,- DM (pair with equalizer)
  • Type of construction: 2-Way, closed with passive radiator, shelf/floorstanding speaker
  • Chassis:
    • Woofer: 1x 305 mm (passive diaphragm)
    • Midrange/woofer: 1x 203 mm
    • Tweeter: 1x Super-Dome 38mm dome with acoustic lens
  • Load capacity (nominal /Musikb.): 25W / 250W max
  • Efficiency:
  • Sound pressure:
    • 92 dB (1 m/1 W input)
    • 100 dB peak (3.6 W input)
    • 108 dB peak (25 W input)
    • 118 dB peak (250 W peak input)
  • Frequency response:
    • 30 - 18,000 Hz (±2.5 dB)
    • 29 - 20,000 Hz (DIN)
  • Transition ranges: 49 Hz (acoustic) / 1,500 Hz (electric)
  • Beam angle:
    • 125 degrees (±30 Degrees) at 500 - 8,000 Hz
    • 75 degrees (at 12,500 Hz)
  • Impedance: 8 ohms (nominal) / 5 ohms (min.)
  • Woofer: 1x 305 mm (passive diaphragm)
  • Midrange/Woofer: 1x 203 mm
  • Tweeter: 1x Super-Dome 38mm dome with acoustic lens
  • 92 dB (1 m/1 W input)
  • 100 dB peak (3.6 W Input)
  • 108 dB peak (25 W input)
  • 118 dB peak (250 W peak input)
  • 30 - 18,000 Hz (±2.5 dB)
  • 29 - 20,000 Hz (DIN)
  • 125 Degrees (±30 Degrees) at 500 - 8,000 Hz
  • 75 degrees (at 12,500 Hz)
  • Successor of the Interface A, with a new tweeter
  • Difference to the beta =>designed as a shelf box, arrangement of the systems in the housing
  • Set-up BBR-2 to use the box as a floorstanding speaker
  • external equalizer (manufactured in Nidau CH-2560) to attenuate the height radiation: slope steepness 0/-3/-6 dB from 10kHz
  • Dimensions: 205 x 65 x 155 mm (WxHxD)
  • Distortions max. 0.005% (20-20,000Hz, 1V)
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