ATL HD 311

Data

General

• Manufacturer: ATL
• Model: HD 311
• Years of manufacture: 1987-1989
• Made in: Germany
• Colors:
• Dimensions 246 x 906 x 373 mm (W x H x D).
• Weight:
• Original price approx.: DM 1.100,--/piece

Technical Data

• Type: 3-way with horn resonator
• Chassis:
  • woofer: 2x 162 mm Westra SW 180-808, 8 Ohm
  • midrange: 87 mm Seas 10 F-M H084, 8 Ohm
  • tweeter: 28 mm modified Isophon KK10 fabric dome tweeter, 4 ohms.
• Power handling (rated/music b.): 110 watts.
• Efficiency:
• Frequency response: 21 - 23,000 Hz.
• Transitional ranges: 130 Hz (horn resonator)/1650/6100 Hz
• Impedance: 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

Other models of the same series:

• HD 304 S
• HD 306 S
• HD 308 S
• HD 309
• HD 310 S
• HD 311
• HD 312 S
• HD 313
• HD 316

Images