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.
  • 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 55,60 excl. VAT: € 46.72 / $ 53.73

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   - not available

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.. str-RA140, price per unit:   EUR 4,20 excl. VAT: € 3.53 / $ 4.06
We recommend one boards per kit (two boards for a speaker pair)


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