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 μF / 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   - not available

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   - 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 / $ 3.88
We recommend one boards per kit (two boards for a speaker pair)


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