Fuerte   Floorstanding as in K+T 6/2015

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 87 dB
  • size (HxWxD): 1400 x 336 x 585 mm
  • frequency range (-8dB): 29 - 20000 Hz
  • crossover frequency(s): 150, 4000 Hz
  • speaker type: transmission line
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Fuerte is a transmission line floorstanding loudspeaker that employs a tweeter Audiopur AMT-13M, a mids woofer Wavecor WF146WA01 and a woofer Wavecor SW270WA01.

This loudspeaker has been developed by Alexander Munk und Arthur Fox.

The crossover consists of a 2nd order high-pass filter (12 dB per octave slope) for the tweeter, a bandpass filter (6 dB high- and 12 dB lowpass) for the midrange and the woofer is connected to a 2nd order low-pass filter.

Between 70 Hz and 2 kHz, the frequency response of this loudspeaker is a bit reserved. The decay spectrum is nearly perfect. At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are lower than 0.6% above 200 Hz.

Our kit consists of

  • air motion transformer Audiopur AMT13M
  • mid-woofer Wavecor WF146WA01, 4 Ohm
  • Subwoofer Wavecor SW270WA01,stamped steel, 4 Ohm
  • 2x Damping Sonofil 100 x 35 cm for 20 litres
  • Foam N25, 100x50x4 cm, black
  • Binding Post PK31, gold plated (one pair, red and black)
  • 5m Speaker cable 2x1.5 mm2, transparent
  • Pan screws 4x20 black, cross recess, 16 pieces
  • Plan for DIY kit

the crossover components (right),
to be mounted on a small wooden board.
  • Audaphon MKP CAP Superior 6.8 uF / 400 Vdc
  • Audaphon MKT CAP 8.2 uF / 160 Vdc
  • 2x Mundorf, electrolytic capacitor, etched, 470 uF/63 Vdc
  • 3x Mundorf, electrolytic capacitor, unetched, 100uF / 50 Vdc
  • 1.0 mm air core coil, 0.10 mH/0.14 Ohm
  • 1.0 mm air core coil, 3.3 mH/1.2 Ohm
  • 0.7 mm air core coil, 0.15 mH/0.28 Ohm
  • Monacor transformer coil LSI-68T, 6.8mH/0.16 Ohm
  • 2x Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
  • 2x Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)

Kit without cabinet, price per speaker   EUR 444,00 excl. VAT: € 373.11 / $ 429.08

Kit with high-end crossover

The high-end kit comes with an ClarityCap ESA capacitor instead of an Audaphon MKP capacitor. Three electrolytical capacitors are replaced by foil capacitors. All inductances are baked varnished 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.

Kit without cabinet, price per speaker   EUR 526,00 excl. VAT: € 442.02 / $ 508.32

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 / $ 3.58
We recommend one boards per kit (two boards for a speaker pair)


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