CT 256-655   Shelf speaker as in K+T 5/2015

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 84 dB
  • size (HxWxD): 420 x 198 x 257 mm
  • frequency range (-8dB): 41 - 19000 Hz
  • crossover frequency(s): Hz
  • speaker type:

The CT 256-655 is a bookshelf hornreflex speaker with Tang-Band W4-655 (golden phase-plug) fullrange speaker. CT 256-655 has been developed by Thomas Schmidt.

The crossover is a serial wave trap to smooth the frequency response between 400 Hz an 3000 Hz.

The frequency response is balanced. At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are lower than 1% above 400 Hz and rises not over 1,5% at 95 dB at 1 m .

Our kit consists of

  • Tang Band W4-655 C, unshielded
  • PE sealing tape, 5x2 mm
  • Damping Sonofil 100 x 35 cm for 20 litres
  • Foam N25-30, 50 x 50 cm, black
  • Binding Post PK31, gold plated (one pair, red and black)
  • 1m 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 MKP CAP Superior 8.2 uF / 400 Vdc
  • 1.0 mm air core coil, 1.0 mH/0.49 Ohm
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker   EUR 67,00 excl. VAT: € 56.30 / $ 64.75

Kit with high-end crossover

The high-end kit comes with a ClarityCap SA capacitor of high quality. The inductance is a baked varnish air core coil 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 77,00 excl. VAT: € 64.71 / $ 74.41

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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