Kormoran   Shelf speaker as in K+T 2/2015

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 83 dB
  • size (HxWxD): 312 x 182 x 272 mm
  • frequency range (-8dB): 50 - 22000 Hz
  • crossover frequency(s): 3100 Hz
  • speaker type: bass reflex

Kormoran is developed by Thomas Schmidt and Holger Barske. Kormoran is home to a Audiopur air motion transformer and a 14 cm mid-woofer Wavecor WF146WA02.

The crossover consists of a 3nd order high-pass filter (18 dB per octave slope) and a 3rd order low-pass filter.

Conclusion of the magazine Klang+Ton:

"Units of cutting-edge technology. Very good and not expensive: That's the way a DIY kit should be. "

Our kit consists of

  • Air motion transformer Audiopur AMT 9M
  • Mid/Woofer Wavecor WF146WA02
  • Bass reflex tube HP50, 50x145 mm, black
  • 1,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • Pan screws 4x20 black, cross recess, 8 pieces
  • Plan for DIY kit

the crossover components (right),
to be mounted on a small wooden board.
  • Audaphon MKT CAP 5.6 uF / 160 Vdc
  • Audaphon MKP CAP Superior 3.9 uF / 400 Vdc
  • Audaphon MKP CAP Superior 10 uF / 400 Vdc
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • 1.0 mm air core coil, 0.22 mH/0.21 Ohm
  • 1.4 mm air core coil, 2.2 mH/0.46 Ohm
  • Metal-oxide resistor, 10W 15 Ohm (brown-green-black)


Kit without cabinet,
price per speaker   EUR 169,00 excl. VAT: € 142.02 / $ 164.74

Kit with high-end crossover

The high-end kit comes with high-value ClarityCap MKP foil capacitors, type SA. The inductances are baked varnished coils for minimizing microphonic effects. - The current flow through the coil creates a magnetic field which sets the reel of wire in motion. This motion induces a voltage in the coil which adds itself to the signal. The stiffer the reel of wire is, the less the signal will be altered.


Kit without cabinet,
price per speaker   EUR 193,00 excl. VAT: € 162.18 / $ 188.13

Impedance correction

If you want to use a valve amplifier with this speaker an impedance correction should be employed. In this case the component quality is less important; therefore, we offer only one kit (upon request higher quality components are available).


Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 13,43 excl. VAT: € 11.29 / $ 13.09

universal PCBs

If you prefer to mount the crossover components on a 159 x 127 mm universal PCB instead on wood:
Universal PCB RA160, order no.. I-2766, price per unit:   EUR 5,10 excl. VAT: € 4.29 / $ 4.97
We recommend one board per kit (two boards for a speaker pair)


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