CT 305   Floorstanding as in K+T 5/2019

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 90 dB
  • size (HxWxD): 805 x 236 x 400 mm
  • frequency range (-8dB): 45 - 23000 Hz
  • crossover frequency(s): Hz
  • speaker type: de bocina

CT 305 is a floorstanding loudspeaker with a full range driver.

CT 305 is a horn loudspeaker with drivers of Visaton .

The kit is delivered with a Visaton B 100 full range driver

The loudspeaker has been developed by Thomas Schmidt.

The crossover consists of one RC curcuit in series to the loudspeaker.

The frequency response of this speaker is nearly linear.

The decay spectrum is nearly perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0.7% above 400 Hz and doesn't exceed 1.6% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Visaton full range driver B 100 - 6 Ohm
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 3m Speaker cable 2x1.5 mm2 black/red
  • 0,5x Pan screws 3.5x17 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 10 uF / 400 Vdc
  • 0.7 mm air core coil, 0.047 mH

Kit without cabinet, price per speaker   EUR 113,00 excl. VAT: € 94.96 / $ 105.40

Kit with high-end crossover

The high-end kit is delivered with 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. The capacitor for the Visaton B 100 is of type polypropylen (MKP) Clarity-Cap ESA 630 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 133,00 excl. VAT: € 111.76 / $ 124.06

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 8,48 excl. VAT: € 7.13 / $ 7.91

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 / $ 3.45
We recommend one board per kit (two boards for a speaker pair)


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