It's business as usual - all systems fully operational throughout Covid lockdowns. No account needed to shop.


Your Basket is Empty


Monacor SPH-135KEP Bass / Midrange

135mm Kevlar Cone Midwoofer.

Popular 5¼ inch upgrade replacement for Linn Isobarik midrange units - the highly musical performance of the SPH-135KEP surpasses the original KEF B110 and gives new levels of insight and detail.

This versatile drive unit also works very well as a high quality replacement for the problematic Mission Keraform 82LF-130 as used in such models as the Mission 780, 782 and others - some woodwork is required for this application, however the efforts are worthwhile as this is an excellent replacement.

The woven Kevlar cone and phase correction plug yield a very wide and smooth usable bandwidth - the output to 7 kHz is remarkably flat. With a maximum linear excursion of 6.5mm, this drive unit delivers an open, airy sound and is equally at home as a bass / midrange in small bookshelf designs or as a very fine dedicated midrange unit.

Key Features:

  • Woven Kevlar Cone
  • Alloy Phase Correction Plug
  • Kapton Voicecoil Former
  • Very Smooth Response
  • Heavy Duty Die Cast Chassis

    Basic parameters:

    Resonant frequency (fs) 45 Hz Nominal impedance (Zn) 8 Ω
    Mechanical Q factor (Qms) 5.54 DC resistance (Re) 6 Ω
    Electrical Q factor (Qes) 0.32 RMS power handling 50W
    Total Q factor (Qts) 0.30 Sensitivity (2.83V/1m) 89 dB
    Equivalent volume (Vas) 15.5L Chassis diameter (pincushion profile) 133 mm


    Here's the full datasheet:

    .pdf icon

    SPH135KEP, SPH 135KEP