KEF SP 1057

Data

General

  • Manufacturer: KEF
  • Model: B110B/ SP 1057;
  • Years of manufacture: from about 1975 onwards;
  • Manufactured in:
  • Colour:
  • Weight: 1.13 kg.
  • Original price approx:


Technical Data

  • Construction: (cone/ dome/...)
  • Diameter: 110 mm;
  • Power handling: 28 V (sinus), fullrange 50 W;
  • Frequency response: 55 - 3500 Hz;
  • Impedance: nominal 8 ohms;
  • Sound pressure level:

Thiele-Small parameters

  • Impedance (Zmax):
  • Diaphragm area (Sd): 92 cm²;
  • Resonant frequency (Fs): 37 (+/- 5) Hz (free air);
  • DC resistance (Re): 7.1 Ohm.
  • Voice coil inductance (Le):
  • Mechanical Q factor (Qms): 2.44;
  • Electrical Q-factor (Qes): 0.38;
  • Total Qts:
  • Equivalent volume (Vas): 23.6 L;
  • Diaphragm displacement volume (Vd):
  • drive factor (Bxl):
  • total moving mass (Mmd):
  • effective moving mass (Mms): 9.8 gm;
  • mechanical losses (Rms):
  • Diaphragm Stroke (Xmax, linear): 6 mm.
  • Efficency Bandwith Product (EBP):

Special Features.

  • Bextren diaphragm.

Comments

Other models in the same series:

  • B110A SP 1003 with the same diaphragm diameter.

Pictures

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