Electro Voice Interface Beta specifications

General

Tech nical data

Special equipment

Other models of the same series:

The interface Beta manufactured in Europe largely corresponds to the interface B series 3 manufactured in America (power supply of the equalizer but 220V instead of 110/120V)

1 data
2 Comments
3 pictures
4 reports
5 links

Manufacturer: Electro Voice
Model: Interface Beta
Years of construction: approx. 1981-1982
Manufactured in: Nidau/Switzerland
Color: Walnut or oak veneer
Dimensions: 775 x 405 x 280 mm (WxHxD)
Weight: 19 kg
Original price approx.: 2800,- DM (pair with equalizer)

Type of construction: 2-way, closed with passive radiator, floorstanding speaker
Chassis:
- Woofer: 1x 305 mm (passive diaphragm)
- Mid/woofer: 1x 203 mm
- Tweeter: 1x Super-Dome 38mm dome with acoustic lens
Load capacity (nominal/musical b.): 25W / 250W
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 - 18000 Hz (±2.5 dB)
- 26 - 20000 Hz (DIN)
Transition ranges: 42 Hz (acoustic) / 1500 Hz (electric)
Beam angle:
- 125 degrees (±30 degrees) at 500 - 8000 Hz
- 75 degrees (at 12500 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 - 18000 Hz (±2.5 dB)
26 - 20000 Hz (DIN)

125 Degrees (±30 Degrees) at 500 - 8000 Hz
75 degrees (at 12500 Hz)

external equalizer to attenuate the height radiation: slope steepness 0/-3/-6 dB from 10kHz
Successor of the interface B, with a new tweeter
difference to the Alpha => integrated pedestal, arrangement of the systems in the housing

external equalizer CH-2560, to reduce the height filter slope (0/-3/-6 dB from 10kHz):
Dimensions: 205 x 65 x 155 mm (WxHxD)
Distortions max. 0.005% (20-20000 Hz, 1V)