K+T Projekt 45   Floorstanding as in K+T 1/2020

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 86 dB
  • size (HxWxD): 950 x 228 x 281 mm
  • frequency range (-8dB): 30 - 26000 Hz
  • crossover frequency(s): 3100 Hz
  • speaker type: bass reflex

K+T Projekt 45 is a two way compact speaker.

K+T Projekt 45 is a bass-reflex cabinet loudspeaker with drivers of Omnes Audio and Visaton.

The kit is delivered with the following drivers:
- a Omnes Audio AMT 60.2 air motion transformer (ribbon-tweeter)
- a Visaton W 170 S, 4 Ohm woofer

The loudspeaker has been developed by Holger Barske and Thomas Schmidt.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a 3rd order low-pass filter (18 dB per octave slope) for the woofer.

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 1% above 300 Hz and doesn't exceed 1,5% at 95 dB at 1 m between 300 and 15000 Hz.

  • Omnes Audio AMT 60.2 (rectangular)
  • Visaton W170 S, 4 Ohm.
  • Bass reflex tube BR19.24, black
  • 2,5x Damping Sonofil 100 x 35 cm for 20 litres
  • 0,5x Foam N25, 100x50x4 cm, black
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • 1,5x Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 3.9 μF / 400 Vdc
  • Audaphon MKT CAP 1.0 μF / 160 Vdc
  • Audaphon MKT CAP 10 μF / 160 Vdc
  • JB, electrolytic capacitor, bipolar advanced, 22uF / 100 Vdc
  • Mundorf air core coil L140, 0.39 mH/0.16 Ohm
  • Mundorf air core coil L140, 0.68 mH/0.26 Ohm
  • 0.7 mm air core coil, 0.22 mH/0.39 Ohm
  • Metal-oxide resistor, 10W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker   EUR 221,00 excl. VAT: € 190.52 / $ 224.81

Kit with high-end crossover

The high-end kit is delivered with baked varnish air core coils on important parts of the crossover 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 capacitors for the Omnes Audio AMT 60.2 are of type polypropylen (MKP) Clarity-Cap ESA 630 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 248,57 excl. VAT: € 214.28 / $ 252.86

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 8,09 excl. VAT: € 6.97 / $ 8.23

universal PCB

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 150x115 mm, tin plated, price per unit:   EUR 4,58 excl. VAT: € 3.95 / $ 4.66
We recommend one board per kit (2 boards per speaker pair)


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