CT 277   Shelf speaker as in K+T 2/2015

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 83 dB
  • size (HxWxD): 220 x 108 x 192 mm
  • frequency range (-8dB): 80 - 22000 Hz
  • crossover frequency(s): Hz
  • speaker type: bass reflex

CT 277 is a small compact box that employs a Omnes Audio wide band driver. This box has been developed by Thomas Schmidt.

The crossover consists of a LRC notch filters wired in series.

Our kit consists of

  • Omnes Audio, full range BB3 AL
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Bitumex board 32.5 x 24.5 cm, 5,5 mm
  • Binding Post PK31, gold plated (one pair, red and black)
  • 1m Speaker cable 2x1.5 mm2, transparent
  • Pan screws 3.5x17 black, cross recess, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 5.6 μF / 400 Vdc
  • 1.0 mm air core coil, 0.82 mH/0.44 Ohm
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)

Kit without cabinet, price per speaker   EUR 75,40 excl. VAT: € 63.36 / $ 69.06

Kit with high-end crossover

The high-end kit comes with a high-value ClarityCap ESA foil capacitor. The inductance is a baked varnished 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   EUR 88,20 excl. VAT: € 74.12 / $ 80.79

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 / $ 3.85
We recommend one boards per kit (two boards for a speaker pair)


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