CT 279   Shelf speaker as in K+T 3/2015

Technical data
  • impedance: 12 Ohm
  • sensivity (2,83V/1m): 76 dB
  • size (HxWxD): 410 x 124 x 215 mm
  • frequency range (-8dB): 45 - 20000 Hz
  • crossover frequency(s): Hz
  • speaker type:

CT 279 is a small compact box that employs a HiWave BMR65-8 fullrange speaker. This box has been developed by Oliver Martin.

Our kit consists of

  • Full range speaker HiWave HIBM65C20F-8
  • Bass reflex tube HP35, 35x125 mm, black
  • PE sealing tape, 5x2 mm
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • 0,25x Audaphon Damping 10, 970 x 470 mm, adhesive
  • Spring loaded terminal T56 D
  • 1m Speaker cable 2x1.5 mm2, transparent
  • 1,5x Pan screws 3.5x17 black, cross recess, 8 pieces
  • Plan for DIY kit

the crossover components (right),
to be mounted on a small wooden board.
  • Mundorf, electrolytic capacitor, unetched, 22uF / 70 Vdc
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • 0.7 mm air core coil, 0.47 mH/0.50 Ohm
  • Metal-oxide resistor, 5W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 5W 22 Ohm (red-red-black)

Kit without cabinet, price per speaker   EUR 48,00 excl. VAT: € 40.34 / $ 46.39

Kit with high-end crossover

The high-end kit comes with high-value MKP foil capacitor instead of electrolytic capacitor. 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 63,00 excl. VAT: € 52.94 / $ 60.88

universal PCB

If you prefer to mount the crossover components on a 140 x 102 mm universal PCB instead on wood:
Universal PCB RA140, order no.. I-2765, price per unit:   EUR 3,70 excl. VAT: € 3.11 / $ 3.58
We recommend one boards per kit (two boards for a speaker pair)


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