ATL HD 312 specifications

Category : Speakers

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Tech nical data

Special equipment

Other models of the same series:

  • Manufacturer: ATL
  • Model: HD 312
  • Years of construction: 1983/84
  • Manufactured in: Germany
  • Colors:
  • Dimensions 300 x 890 x 330 mm (W x H x D)
  • Weight: 27 Kg
  • Original price approx.: 2200,- DM (RRP pair)
  • Type of construction: 3-way with horn resonator
  • Chassis:
    • Woofer : 250 mm - Westra SW 250-2004 8Ohm (data taken from the loudspeaker)
    • Midrange: 103 mm - Seas 11F-M H143 8Ohm (data taken from the loudspeaker)
    • Tweeter: 28 mm Isophone SKK10 8ohm Fabric dome
    • Power handling (nominal/music b.): 120 Watts
  • Efficiency: 91 dB/m at 0.9 watts
  • Frequency range: 20 - 23,000 Hz
  • Transition ranges: 130 Hz (horn resonator)/1600/9000 Hz
  • Impedance: 8 ohms
  • Woofer: 250 mm - Westra SW 250-2004 8Ohm (data taken from the loudspeaker)
  • Midrange: 103 mm - Seas 11F-M H143 8Ohm (data taken from the loudspeaker)
  • Tweeter: 28 mm Isophone SKK10 8ohm Fabric dome
  • Power handling (nominal/music b.): 120W
  • Horn Reson ator
    HD 306
  • HD 308 i
  • HD 310 i
  • HD 312
  • HD 314

ATL HD 312

ATL HD 312

ATL HD 312


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