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== Data ==
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== Daten ==
'''General'''
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'''Allgemein'''
* Manufacturer: [[ATL]]
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* Hersteller: [[ATL]]
* Model: HD 311
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* Entwickler: [[Hans Deutsch]]
* Years of manufacture: 1987-1989
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* Modell: HD 311
* Made in: Germany
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* Baujahre: Ende der 80er Jahre
* Colors:
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* Hergestellt in: Deutschland
* Dimensions 246 x 906 x 373 mm (W x H x D).
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* Farben:
* Weight:
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* Abmessungen (HxBxT): ca. 90x25x35 cm
* Original price approx.: DM 1.100,--/piece
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* Gewicht:
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* Neupreis ca.:
  
  
'''Technical Data'''
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'''Technische Daten'''
* Type: 3-way with horn resonator
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* Bauart: 3 Wege mit Hornresonator
 
* Chassis:
 
* Chassis:
** woofer: 2x 162 mm [[Westra]] SW 180-808, 8 Ohm
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** HT: modifizierte [[Isophon]] KK10 Gewebekalotte, 4 Ohm
midrange: 87 mm [[Seas]] 10 F-M H084, 8 Ohm
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** MT: (Seas ?)
** tweeter: 28 mm modified [[Isophon]] KK10 fabric dome tweeter, 4 ohms.
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** TT: 2 parallel geschaltete 6,5", Bezeichnung HDW180-808, 8 Ohm (evtl. [[Westra]]? [[Vifa]]?)
* Power handling (rated/music b.): 110 watts.
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* Nennbelastbarkeit: 110 Watt
* Efficiency:
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* Wirkungsgrad:
* Frequency response: 21 - 23,000 Hz.
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* Frequenzgang:
* Transitional ranges: 130 Hz (horn resonator)/1650/6100 Hz
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* Übergangsbereiche:  
* Impedance: 6 Ohm
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* Impedanz: 6 Ohm
  
  
'''Special Features'''
 
* Horn resonator
 
* ''Acoustically Active'' crossover:
 
** HT: 2nd order high pass, 3.3 uF | 0.15 mH
 
** MT: 1st order high pass, 4.7 uF.
 
** TT: low pass 1st order, approx. 0.9 mH
 
  
== Remarks ==
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'''Besondere Ausstattungen'''
Other models of the same series:
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* Hornresonator
* [[ATL HD 304 S|HD 304 S]]
 
* [[ATL HD 306 S|HD 306 S]]
 
* [[ATL HD 308 S|HD 308 S]]
 
* [[ATL HD 309|HD 309]]
 
* [[ATL HD 310 S|HD 310 S]]
 
* [[ATL HD 311|HD 311]]
 
* [[ATL HD 312 S|HD 312 S]]
 
* [[ATL HD 313|HD 313]]
 
* [[ATL HD 316|HD 316]]
 
  
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== Bemerkungen ==
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Weitere Modelle der gleichen Serie:
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* [[ATL Lautsprecher]], HD-Serie
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* [[Hans Deutsch Lautsprecher]]
  
== Images ==
 
[[Image:Atlhd311.jpg]]
 
  
== Reports ==
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== Bilder ==
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[[Bild:Atlhd311.jpg]]
  
== Links ==
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[[Kategorie:Lautsprecher]]
 
 
[[Category:Loudspeaker]]
 

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