Audax HM130C0 Bass Midrange

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Audax HM130C0 Bass Midrange

HFW Design KLS4, KLS7

Audiophile 5¼ inch / 130mm bass midrange drive unit featuring a woven carbon fibre cone, fully ventilated chassis / pole piece, edgewound flat copper voicecoil, high loss / high compliance rubber suspension. A superb performer, one of the finest small drive units of all time.

New old stock in original factory boxes - very rare.

Key Features:

  • High damping / stiffness woven carbon fibre cone
  • Non resonant diecast Zamak chassis
  • Edgewound flat copper voicecoil
  • High compliance rubber suspension
  • Kapton voice coil former
  • Vented pole piece
  • Gold plated terminals

Basic parameters:

Resonant frequency (fs) 46 Hz Nominal impedance (Zn) 8 Ω
Mechanical  Q factor (Qms) 3.60 DC resistance (Re) 6.2 Ω
Electrical Q factor (Qes) 0.34 RMS power handling 70 W
Total Q factor (Qts) 0.31 Sensitivity (2.83V/1m) 90 dB
Equivalent volume (Vas) 18.1L Chassis diameter (cropped) 152 mm

Here's the full datasheet:

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