DigiBox 87FE   Shelf speaker as in Hobby Hifi 5/2014

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 85 dB
  • size (HxWxD): 242 x 150 x 190 mm
  • frequency range (-8dB): 60 - 20000 Hz
  • crossover frequency(s): Hz
  • speaker type: bass reflex

DigiBox 87FE is designed by Bernd Timmermanns. It contains a fullrange speaker Visaton SL 87FE. It feels at home in a bass reflex cabinet.

Our kit consists of

  • Visaton SL87 FE, 8 Ohm
  • Bass reflex tube HP35, 35x123mm, black
  • 0,25x Damping Sonofil 100 x 35 cm for 20 litres
  • Female banana jacks, red and black
  • 1m Speaker cable 2x0.75 mm2, transparent
  • 0,5x Pan screws 4x20 black, cross recess, 8 pieces
  • Plan for DIY kit

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

  • Jantzen Cross Cap MKP capacitor 6.8 μF / 400V
  • Audaphon MKT CAP 1.5 μF / 160 Vdc
  • Mundorf, electrolytic capacitor, unetched, 5.6 μF / 70 Vdc
  • Mundorf air core coil L50, 4.7 mH/3.777 Ohm
  • 1.0 mm air core coil, 0.12 mH/0.15 Ohm
  • 1.0 mm air core coil, 0.47 mH/0.32 Ohm
  • Metal-oxide resistor, 5W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 5W 10 Ohm (brown-black-black)
  • Metal-oxide resistor, 5W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 82,40 excl. VAT: € 69.24 / $ 80.32

Kit with high-end crossover

The kit with high-end crossover contains Audaphon foil capacitors with polypropylen foil. In series to the loudspeaker Mundorf baked varnish coils are used.

Kit with high-end-crossover without cabinet, price per speaker   EUR 87,70 excl. VAT: € 73.70 / $ 85.49

price-performance kit

The following kit contains only one wave trap curcuit in the crossover. In addition it contais an inexpensive spring loaded terminal.

Kit with high-end-crossover without cabinet, price per speaker   EUR 35,20 excl. VAT: € 29.58 / $ 34.31

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 7,40 excl. VAT: € 6.22 / $ 7.21

universal PCB

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 5,92 excl. VAT: € 4.97 / $ 5.77
We recommend one board per kit (two boards for a speaker pair)


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