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__NOTOC__
 
__NOTOC__
== Data ==
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== Daten ==
{{navigation}}
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{{Navigation}}
'''General'''
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'''Allgemein'''
* Manufacturer: [[Electro Voice]]
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* Hersteller: [[Electro Voice]]
* Model: Interface Alpha
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* Modell: Interface Alpha
* Years of manufacture: ca. 1981-1982
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* Baujahre: ca. 1981-1982
* Manufactured in: Nidau/Switzerland
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* Hergestellt in: Nidau/Schweiz
* Colour: walnut or oak veneer
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* Farbe: Nußbaum oder Eiche Furnier
* Dimensions: 625 x 390 x 210 mm (HxWxD)
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* Abmessungen: 625 x 390 x 210 mm (HxBxT)
* Weight: 14 kg
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* Gewicht: 14 kg
* Original price approx.: 1950,- DM (pair with equalizer)
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* Neupreis ca.: 1'950 DM (Paar mit Equalizer)
  
  
'''Technical data'''
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'''Technische Daten'''
* Type: 2-way, closed with passive radiator, shelf / floorstanding speaker
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* Bauart: 2-Wege, geschlossen mit Passivstrahler, Regal/Standlautsprecher
* drivers:
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* Chassis:
** woofer: 1x 305 mm (passive cone).
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** Tieftöner: 1x 305 mm (Passivmembran)
** midrange / bass driver: 1x 203 mm
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** Mittel-/Tieftöner: 1x 203 mm
Tweeter: 1x Super-Dome 38mm dome with acoustic lens
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** Hochtöner: 1x Super-Dome 38mm Kalotte mit akustischer Linse
* Power handling (nominal/music): 25W / 250W max.
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* Belastbarkeit (Nenn-/Musikb.): 25W / 250W max
* Efficiency:
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* Wirkungsgrad:
* Sound pressure:
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* Schalldruck:
** 92 dB (1 m/1 W input).
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** 92 dB (1 m/1 W Input)
100 dB peak (3.6 W input)
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** 100 dB Peak (3.6 W Input)
108 dB peak (25 W input)
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** 108 dB Peak (25 W Input)
118 dB Peak (250 W Peak Input)
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** 118 dB Peak (250 W Peak-Input)
* Frequency Response:
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* Frequenzgang:
** 30 - 18,000 Hz (±2.5 dB).
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** 30 - 18.000 Hz (±2.5 dB)
29 - 20,000 Hz (DIN)
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** 29 - 20.000 Hz (DIN)
* Transition Ranges: 49 Hz (Acoustical) / 1,500 Hz (Electrical).
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* Übergangsbereiche: 49 Hz (akustisch) / 1.500 Hz (elektrisch)
* Dispersion angle:
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* Abstrahlwinkel:
** 125 degrees (±30 degrees) at 500 - 8,000 Hz.
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** 125 Grad (±30 Grad) bei 500 - 8.000 Hz
75 degrees (at 12,500 Hz)
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** 75 Grad (bei 12.500 Hz)
* Impedance: 8 ohms (nominal) / 5 ohms (min.)
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* Impedanz: 8 Ohm (nominal) / 5 Ohm (min.)
  
  
'''Special Features'''
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'''Besondere Ausstattungen'''
* Successor of the [[Electro Voice Interface A|Interface A]], with new tweeter.
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* Nachfolger der [[Electro Voice Interface A|Interface A]], mit neuem Hochtöner
* Difference to the Beta => designed as a shelf speaker, arrangement of the systems in the cabinet
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* Unterschied zur Beta => als Regalbox konzipiert, Anordnung der Systeme im Gehäuse
* stand BBR-2, to use the speaker as a floorstanding speaker
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* Aufsteller BBR-2, um die Box als Standlautsprecher zu verwenden
* external equaliser (made in Nidau CH-2560) to attenuate the treble: slope 0/-3/-6 dB above 10kHz
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* externer Equalizer (hergestellt in Nidau CH-2560), um die Höhenabstrahlung zu bedämpfen: Flankensteilheit 0/-3/-6 dB ab 10kHz
* dimensions: 205 x 65 x 155 mm (WxHxD)
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* Abmessungen: 205 x 65 x 155 mm (BxHxT)
* Distortion max. 0.005% (20-20.000 Hz, 1V)
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* Verzerrungen max. 0.005% (20-20.000 Hz, 1V)
  
== Remarks ==
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* Other models in the same series:
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== Bemerkungen ==
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* Weitere Modelle der gleichen Serie:
 
* [[Electro Voice Interface Beta]]
 
* [[Electro Voice Interface Beta]]
 
* [[Electro Voice Interface Gamma]]
 
* [[Electro Voice Interface Gamma]]
 
* [[Electro Voice Interface Delta]]
 
* [[Electro Voice Interface Delta]]
  
* European-made Interface Alpha is largely the same as the American-made Interface A series 3.
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* Die in Europa gefertigte Interface Alpha entspricht weitgehend der in Amerika gefertigten Interface A series 3  
(power supply of the equalizer however 220V instead of 110/120V)
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(Spannungsversorgung des Equalizer aber 220V statt 110/120V)
  
  
== Pictures ==
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== Bilder ==
  
  
== Reports ==
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== Berichte ==
Tested in German HiFi magazine Stereoplay 5/1981 (one of the four test winners)
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* Getestet in dt. HiFi-Fachzeitschrift Stereoplay 5/1981 (einer der vier Testsieger)
  
 
== Links ==
 
== Links ==
* [https://web.archive.org/web/20120513212823/http://www.hifi-studio.de/hifi-klassiker/EV_Interface-A/EV_Interface-A.htm data and pictures] at HiFi Studio
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* [https://web.archive.org/web/20120513212823/http://www.hifi-studio.de/hifi-klassiker/EV_Interface-A/EV_Interface-A.htm Daten und Bilder] bei HiFi Studio
  
[[Category:Loudspeaker]]
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[[Kategorie:Lautsprecher]]

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