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 μF / 160 Vdc
  • Audaphon MKP CAP Superior 3.9 μF / 400 Vdc
  • Audaphon MKP CAP Superior 10 μF / 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 261,00 excl. VAT: € 219.33 / $ 254.42

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   - not available

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 23,70 excl. VAT: € 19.92 / $ 23.10

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.. str-RA160, price per unit:   EUR 5,92 excl. VAT: € 4.97 / $ 5.77
We recommend one board per kit (two boards for a speaker pair)


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