International   Floorstanding as in K+T 5/2020

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 94 dB
  • size (HxWxD): 950 x 500 x 300 mm
  • frequency range (-8dB): 32 - 21000 Hz
  • crossover frequency(s): 700 Hz
  • speaker type: bass reflex

International is a two way floorstanding speaker.

International is a bass-reflex cabinet loudspeaker with drivers of Oberton and Beyma.

The kit is delivered with the following drivers:
- a Oberton D2545 + JMLC-400 horn with driver
- a Beyma 12 WR 400 woofer

The loudspeaker has been developed by Thomas Schmidt.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a 2nd order low-pass filter (12 dB per octave slope) for the woofer.

The frequency response of this speaker is nearly linear.

The decay spectrum (waterfall spectrum) shows a decelerated swing-out behaviour in the mid-range.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0.7% above 200 Hz and doesn't exceed 0.8% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Auto-Tech JMLC-400 Horn
  • Oberton D2545 driver, 1 inch 2-20 kHz, 8 Ohm
  • Beyma woofer 12 WR 400, 400 Watt
  • Bass reflex tube HP100, 100x197 mm, black
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • 2x Binding Post PK31, gold plated (one pair, red and black)
  • 4m Speaker cable 2x2.5 mm2, transparent
  • Allen wood screws, black, 5x30 mm, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 10 μF; / 400 Vdc
  • Audaphon MKP CAP Superior 15 μF; / 400 Vdc
  • Audaphon MKT CAP 33 μF; / 160 Vdc
  • Mundorf, electrolytic capacitor, etched, 270 uF/63 Vdc
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • Audaphon M core coil M14, 4.7 mH/0.24 0hm
  • Mundorf ferrite core coil F71. 2.2 mH/0.91 Ohm
  • Mundorf H core coil H71, 18 mH/1.28 0hm
  • ceramic resistor 6.8 Ohm/20 Watt
  • 2x Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • 3x Metal-oxide resistor, 10W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 604,00 excl. VAT: € 520.69 / $ 609.21

Kit with high-end crossover

The high-end kit is delivered with 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 capacitors for the Oberton D2545 + JMLC-400 are of type polypropylen (MKP) Clarity-Cap CSA 630 V.

  • ClarityCap CSA capacitor 15 μF; / 630 Vdc
  • Audaphon MKP CAP Superior 10 μF; / 400 Vdc
  • Audaphon MKT CAP 33 μF; / 160 Vdc
  • Mundorf, electrolytic capacitor, etched, 270 uF/63 Vdc
  • Mundorf baked varnish air core coil BL71, 0.33 mH/0.48 Ohm
  • Mundorf baked varnish ferrite core coil, BF71, 2.2 mH/0.91 Ohm
  • Mundorf H core coil H71, 18 mH/1.28 0hm
  • Mundorf H core baked varnish coil BH140, 4.7 mH/0.26 0hm
  • ceramic resistor 6.8 Ohm/20 Watt
  • 2x Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • 3x Metal-oxide resistor, 10W 15 Ohm (brown-green-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 648,00 excl. VAT: € 558.62 / $ 653.59

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).

  • JB, electrolytic capacitor, bipolar advanced, 33μF / 100 Vdc
  • 1.0 mm air core coil, 2.7 mH/0.93 Ohm
  • ceramic resistor 12 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 15,83 excl. VAT: € 13.65 / $ 15.97

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 11,41 excl. VAT: € 9.84 / $ 11.51
We recommend one board per kit (2 boards per speaker pair)


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