CT 291   Floorstanding as in K+T 3/2017

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 84 dB
  • size (HxWxD): 977 x 152 x 172 mm
  • frequency range (-8dB): 42 - 21000 Hz
  • crossover frequency(s): 2100 Hz
  • speaker type: bass reflex

CT 291 is a 2 way floorstanding speaker with drivers from Mivoc.

The kit is delivered with two Mivoc WAL 416 woofers and Mivoc HGH 258 FN II tweeter.

CT 291 is developed by Thomas Schmidt.

The frequency response of this speaker is nearly linear on axis. The decay spectrum is without faults above 500 Hz. At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are mostly lower than 0.5 % above 400 Hz and stays below 1 % at 95 dB at 1 m .

Our kit consists of

  • Mivoc neodymium silk dome HGH 258 FN II, black
  • 2x Mivoc WAL 416, woofer with 16 Ohm
  • 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 3.5x17 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 4.7 uF / 400 Vdc
  • 2x Audaphon MKT CAP 1.5 uF / 160 Vdc
  • Audaphon MKT CAP 10 uF / 160 Vdc
  • 1.0 mm air core coil, 1.5 mH/0.63 Ohm
  • 0.7 mm air core coil, 0.27 mH/0.44 Ohm
  • Metal-oxide resistor, 10W 1.5 Ohm (brown-green-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker   EUR 96,00 excl. VAT: € 80.67 / $ 91.16

Kit with high-end crossover

The high-end kit is delivered with backlack coils 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. All capacitors are foil capacitors of type polypropylen (MKP). In series to the tweeter a high quality Clarity Cap ESA 630V is used.

Kit with high-end-crossover without cabinet, price per speaker   EUR 117,00 excl. VAT: € 98.32 / $ 111.10

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).


Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 17,65 excl. VAT: € 14.83 / $ 16.76

universal PCBs

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 / $ 3.51
We recommend one board per kit (two boards for a speaker pair)


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