Noun   Shelf speaker as in K+T 5/2016

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 88 dB
  • size (HxWxD): 700 x 380 x 318 mm
  • frequency range (-8dB): 49 - 19000 Hz
  • crossover frequency(s): 150 Hz
  • speaker type: bass reflex

The Noun is a FAST (Fullrange and Subwoofer Technology) speaker with drivers from Sica. The kit is delivered with the Sica 6 D 1,5 CS 8 as fullrange driver and the Sica 12 S 2,5 CS 8 for the bass range.

Noun is developed by Olaf Schauer und Wolfgang Vollstädt.

The crossover consists of a 2nd order low-pass filter (12 dB per octave slope) for the woofer. The fullrange driver is connected to a 12 dB high-pass filter, a voltage devider, and a blocking circuit.

The frequency response of this speaker is linear on axis (with typical resonances of fullrange speakers) and with a slight bass boost at 80 Hz. The decay spectrum is without faults. At low volume, i.e. 95 dB at 1 m, the nonlinear distortions are mostly lower than 1% above 500 Hz and stays below 1% (except between 2 and 3 kHz) at 105 dB at 1 m .

Our kit consists of

  • Sica 12 S 2,5 CS 8 Ohm
  • Sica 6 D 1,5 CS 8 Ohm
  • Bass reflex tube HP70, 68x160 mm, black
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 2x 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, cross recess, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKT CAP 5.6 uF / 160 Vdc
  • Audaphon MKT CAP 6.8 uF / 160 Vdc
  • Mundorf, electrolytic capacitor, unetched, 33uF / 70 Vdc
  • Mundorf, electrolytic capacitor, unetched, 47uF / 50 Vdc
  • Mundorf air core coil L140, 5.6 mH/0.89 Ohm
  • 0.7 mm air core coil, 0.10 mH/0.27 Ohm
  • Mundorf H core coil H71, 3.3 mH/0.47 0hm
  • Metal-oxide resistor, 10W 2.2 Ohm (red-red-gold)
  • 2x Metal-oxide resistor, 10W 10 Ohm (brown-black-black)
  • 2x Metal-oxide resistor, 10W 22 Ohm (red-red-black)

Kit without cabinet, price per speaker   EUR 230,00 excl. VAT: € 193.28 / $ 237.73

Kit with high-end crossover

The high-end kit is delivered complete 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 type and for the fullrange driver high quality polypropylen (MKP) capacitors are used.

Kit with high-end-crossover without cabinet, price per speaker   EUR 265,00 excl. VAT: € 222.69 / $ 273.91

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 7,94 excl. VAT: € 6.67 / $ 8.21

universal PCBs

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 220x155 mm, order no. I-8805002, price per unit:   EUR 11,70 excl. VAT: € 9.83 / $ 12.09
We recommend two boards per kit (four boards for a speaker pair)


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