Electro Voice Interface Delta

Data

General

• Manufacturer: Electro Voice
• Model: Interface Delta
• Years of manufacture: ca. 1981-1982
• Manufactured in: Nidau/Switzerland
• Colour: walnut or oak veneer
• Dimensions: 820 x 550 x 395 mm (HxWxD),
• Weight: 52 kg
• Original price approx.: DM (pair with equalizer)

Technical data

• Type: 3-way, ventilated, floorstanding speaker
• Chassis:
  • Woofer: 1x 305 mm

Midrange driver: 1x 165 mm

• • tweeter: 1x radial horn ST350A
• Power handling (nominal/music): 25 W / 500W max.
• Efficiency:
• Sound pressure:
  • 97 dB (1 m/1 W input)

103 dB peak (3.6 W input) 115 dB peak (25 W input) 120 dB peak (500 W peak input)

• Frequency Response:
  • 28 - 18,000 Hz (±2.5 dB).

23 - 20,000 Hz (DIN)

• Transition Ranges: 40 Hz (Acoustical) / 350 Hz (Electrical) / 3,000 Hz (Electrical).
• Dispersion angle:
  • 170 degrees (±5 degrees) at 500 - 1,000 Hz.

115 degrees (±10 degrees) at 2,000 - 16,000 Hz 110 degrees (at 16,000 Hz) Impedance: 8 ohms (nominal) / 5 ohms (min.)

Special Features

• external equalizer CH-2560 to influence the treble filter slope (0/-3/-6 dB from 10 kHz):
  • Dimensions: 205 x 65 x 155 mm (WxHxD).
• Distortion max. 0.005% (20 - 20,000 Hz, 1 V)

Remarks

• Successor to the Interface D
• Other models in the same series:
  • Interface Alpha
  • Interface Beta
  • Interface Gamma