CT 270, Shelf speaker   as in K+T 1/2014

Technical data
- impedance: 6 Ohm
- sensivity (2,83V/1m): 87 dB
- size (HxWxD): 382 x 282 x 182 mm
- frequency range (-8dB): 50 - 20000 Hz
- crossover frequency(s): 2050 Hz
- speaker type: closed box

Looking for a cheap Kit (cheap trick) Thomas Schmidt encountered Visaton chassis. Thomas Schmidt chose Visaton woofer W170S4 and the Visaton dome tweeter SC10N. These are used in a closed, easy-to-install housing.

A second-order crossover is used (slope 12 dB/octave).
 

  

Our kit consists of

  • Visaton tweeter SC10N
  • Visaton woofer W170 S4
  • PE sealing tape, 5x2 mm
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Terminal T105 Au, with brass, gold plated
  • 1,5m Speaker cable 2x1.5 mm2, transparent
  • Pan screws 3.5x17 black, 8 pieces
  • Countersunk screws 3.5x25, 8 pcs
  • Plan for DIY kit

the crossover components (right),
to be mounted on a small wooden board.

  • Audaphon MKP CAP Superior 5.6 uF / 400 Vdc
  • Audaphon MKT CAP 22 uF / 160 Vdc
  • 0.7 mm air core coil, 0.56 mH/0.55 Ohm
  • 1.4 mm air core coil, 1.2 mH/0.33 Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker EUR 101,00 excl. VAT: € 84.87 / $ 97.61

Kit with high-end crossover

In the kit with high end crossover ClarityCap capacitors are used. All coils are designed as baked varnish air core coils to suppress vibrations in the coil.

  • ClarityCap SA capacitor 5.6 uF / 630 Vdc
  • ClarityCap PWA capacitor 22 uF / 160 Vdc
  • Mundorf baked varnish air core coil BL71, 0.56 mH/0.64 Ohm
  • Mundorf baked varnish air core coil BL140, 1.2 mH/0.34 Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker EUR 116,00 excl. VAT: € 97.48 / $ 112.10

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).

  • Mundorf, electrolytic capacitor, unetched, 47uF / 50 Vdc
  • 0.7 mm air core coil, 0.15 mH/0.32 Ohm
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)


Price per impedance correction for one speaker, to be mounted on a small wooden board.   EUR 9,10 excl. VAT: € 7.65 / $ 8.79

universal PCB

If you prefer to mount the crossover components on a 159 x 127 mm universal PCB instead on wood:
Universal PCB RA160, order no.. I-2766, price per unit: EUR 5,10 excl. VAT: € 4.29 / $ 4.93
We recommend one board per kit (two boards for a speaker pair)
 


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