Belaja   Shelf speaker as in K+T 4/2018

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 87 dB
  • size (HxWxD): 600 x 250 x 300 mm
  • frequency range (-8dB): 50 - 24000 Hz
  • crossover frequency(s): 2000 Hz
  • speaker type: closed box
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Belaja is a two way compact speaker.

Belaja is a closed-cabinet loudspeaker with drivers of Audaphon and Accuton.

The kit is delivered with the following drivers:
- a Audaphon AMT 1i tweeter
- two Accuton C173-11-191E midrange / bass drivers

The loudspeaker has been developed by Dennis Frank and Daniel Gattig.

The crossover consists of:
- a first order high-pass filter (6 dB per octave slope) for the tweeter.
- a first order low-pass filter (6 dB per octave slope) for the woofer. To both loudspeakers a trap filter is in parallel.

The frequency response of this speaker is perfectly linear.

The decay spectrum as shown in the waterfall diagram is exemplary, free of any disturbing resonance.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,5% above 200 Hz and doesn't exceed 0,6% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • 2x Accuton/Thiel C173-11-191E mids/woofer, one unit
  • Audaphon AMT-1i
  • 2x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK28 I Ni, nickel plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, red-black, 1 m
  • 1,5x Pan screws 4x20 black, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 1.0 uF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 uF / 400 Vdc
  • 2x Audaphon MKT CAP 4.7 uF / 160 Vdc
  • 1.3 mm air core coil, 1.8 mH/0.45 Ohm
  • 0.7 mm air core coil, 0.39 mH/0.49 Ohm
  • 0.7 mm air core coil, 1.8 mH/1.15 Ohm
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)
  • Metal-oxide resistor, 10W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 1248,00 excl. VAT: € 1048.74 / $ 1206.05

Kit with high-end crossover

The high-end kit is delivered with foil and baked varnish air core coils on important parts of the crossover 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. The capacitor in series to the tweeter is of type polypropylen (MKP) Clarity-Cap DTAC 630 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 1338,00 excl. VAT: € 1124.37 / $ 1293.03

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 12,50 excl. VAT: € 10.50 / $ 12.08

universal PCB

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 / $ 11.31
We recommend one board per kit (2 boards per speaker pair)


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