CT 284   Floorstanding as in K+T 2/2016

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 85 dB
  • size (HxWxD): 1197,4 x 450 x 368 mm
  • frequency range (-8dB): 30 - 20000 Hz
  • crossover frequency(s): 300 Hz
  • speaker type: bass reflex

CT 284 is a dipole speaker with drivers from Visaton.

CT 284 is a 2 Way F.A.S.T (Fullrange and subwoofer technology) floorstanding speaker.

It is home to a fullrange loudspeaker Visaton BG 13 P and two woofer Visaton W250, 8 Ohm.

CT284 is developed by Holger Barske and Thomas Schmidt .

The crossover consists of a second order high-pass filter (12 dB per octave slope) for the tweeter. A serial RCL is smoothing the frequency response in the midrange. The woofers are connected to a 2nd order low-pass filter.

Our kit consists of

  • Visaton BG 13 P, 8 Ohm
  • 2x Visaton W250, 8 Ohm
  • Binding post terminal PK2-LS, gold plated
  • 3m 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.

  • Audaphon MKT CAP 1.5 uF / 160 Vdc
  • Audaphon MKT CAP 15 uF / 160 Vdc
  • Mundorf, electrolytic capacitor, unetched, 47uF / 50 Vdc
  • 2x 1.0 mm air core coil, 1.5 mH/0.63 Ohm
  • Mundorf bs125 core coil 12mH/0.51Ohm
  • Metal-oxide resistor, 10W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 179,00 excl. VAT: € 150.42 / $ 169.97

Kit with high-end crossover

The high-end kit is delivered with baked varnish air 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. All capacitors are foil capacitors.

Kit with high-end-crossover without cabinet, price per speaker   EUR 198,00 excl. VAT: € 166.39 / $ 188.02

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 9,50 excl. VAT: € 7.98 / $ 9.02

universal PCBs

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 150x115 mm, tin plated, price per unit:   EUR 4,70 excl. VAT: € 3.95 / $ 4.46
We recommend two boards per kit (4 boards per speaker pair)


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