Visamon 170   Shelf speaker as in Hobby HiFi 1/2016

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 84 dB
  • size (HxWxD): 350 x 200 x 280 mm
  • frequency range (-8dB): 45 - 22000 Hz
  • crossover frequency(s): 2100 Hz
  • speaker type: closed box

Visamon 170 is a 2 way compact speaker with GHP technology. GHP stands for the German words: Geschlossen mit Hochpass. It is standing for closed cabinet with high pass filter for the woofer. In Visamon 170 a Visaton woofer AL 170 and a Visaton tweeter KE 25 SC is used. Visamon 170 has been developed by Bernd Timmermanns.

The crossover consists of a 4th order high-pass filter (24 dB per octave slope) for the tweeter, a 3rd order low-pass filter (18 dB per octave slope) with an parallel RCL for the woofer. In series to the woofer a high-pass filter is used (GHP technology).

Between 100 Hz and 20 kHz, the frequency response of this loudspeaker is nearly flat on axis. The decay spectrum is perfect. At low volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0.5% above 200 Hz.

Our kit consists of

  • Visaton KE 25 SC, 8 Ohm
  • Visaton woofer AL 170, 8 Ohm
  • Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x2.5 mm2, transparent
  • 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 MKP CAP Superior 5.6 μF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 μF / 400 Vdc
  • 2x electrolytic capacitor, etched, 15 μF/100 Vdc
  • electrolytic capacitor, etched, 560 μF/63 Vdc
  • electrolytic capacitor, unetched, 15uF / 70 Vdc
  • Mundorf air core coil L50, 1.5 mH/1.85 0hm
  • Mundorf air core coil L140, 1.5 mH/0.38 Ohm
  • Mundorf air core coil L140, 0.56 mH/0.20 Ohm
  • 1.3 mm air core coil, 1.5 mH/0.40 Ohm
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • Metal-oxide resistor, 5W 2.2 Ohm (red-red-gold)
  • Metal-oxide resistor, 5W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 5W 10 Ohm (brown-black-black)
  • Metal-oxide resistor, 5W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker   EUR 502,00 excl. VAT: € 421.85 / $ 455.60

Kit with high-end crossover

Kit with high-end-crossover without cabinet, price per speaker   EUR 779,00 excl. VAT: € 654.62 / $ 706.99

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 14,20 excl. VAT: € 11.93 / $ 12.89

universal PCBs

If you prefer to mount the crossover components on a 159 x 127 mm universal PCB instead on wood:
Universal PCB RA160, order no.. str-RA160, price per unit:   EUR 5,90 excl. VAT: € 4.96 / $ 5.35
We recommend one board per kit (two boards for a speaker pair)


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