Donau MK2   Floorstanding as in newsletter

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 82 dB
  • size (HxWxD): 1100 x 240 x 350 mm
  • frequency range (-8dB): 31 - 30000 Hz
  • crossover frequency(s): 220, 2000 Hz
  • speaker type: closed box

Donau MK2 is a 3 Way high-end floorstanding speaker with closed bassrange system, ceramic midrange and air-motion-transformer. The tweeter is the very linear Air Motion Transformer Audaphon AMT-1i with very low distorsion. In the Donau MK2 kit the Accuton C173-6-191E is used as mids speaker. This Accuton midrange speaker you can find in a lot of high quality speakers in the five digit price range. The woofers are Wavecor SW182BD01 with 8 mm linear excursion and low distorsion balance drive technology. This woofers are very good to use in closed bass systems.

The crossover consists of a 3rd order high-pass filter (18 dB per octave slope) for the tweeter, a bandpass filter (12 dB high - and 12 dB lowpass) for the two mids. The woofer is connected to a 2nd order low-pass filter.

Between 40 Hz and 21000 Hz, the frequency response of this loudspeaker is very linear on axis. The decay spectrum is nearly perfect. At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are lower than 0.4% above 500 Hz and below 0.6% at 95 dB at 1 m .

Our kit consists of

  • Accuton/Thiel C173-6-191E mids/woofer, one unit
  • Audaphon AMT-1i
  • 4x Wavecor Subwoofer SW182BD03, die cast, 4 Ohm
  • 1,5x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK28 I, gold plated (one pair, red and black)
  • 4m Speaker cable 2x1.5 mm2, transparent
  • 4x Allen wood screws, black, 4x25 mm, 8 pieces
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 10 μF / 160 Vdc
  • ClarityCap PWA capacitor 100uF / 160 Vdc
  • Audaphon MKP CAP Superior 0.68 μF / 400 Vdc
  • Audaphon MKP CAP Superior 5.6 μF / 400 Vdc
  • Audaphon MKP CAP Superior 6.8 μF / 400 Vdc
  • Audaphon MKT CAP 100 μF / 160 Vdc
  • Mundorf, electrolytic capacitor, etched, 220 μF/63 Vdc
  • 1.3 mm air core coil, 2.2 mH/0.48 Ohm
  • 0.7 mm air core coil, 0.47 mH/0.50 Ohm
  • 0.7 mm air core coil, 0.68 mH/0.70 Ohm
  • Mundorf bs140 core coil 8.2mH/0.33Ohm
  • Mundorf H core coil H71, 3.9 mH/0.5 0hm
  • Mundorf H core coil H71, 33 mH/1.93 0hm
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)
  • 5x Metal-oxide resistor, 10W 10 Ohm (brown-black-black)
  • Metal-oxide resistor, 10W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker *   - not available

* In the Klang+Ton Magazine is an error about the price. The price is per kit, not for a pair.

Kit with high-end crossover

The high-end kit is delivered with an CFC I-core coil instead of an Backlack I-core coil for the woofer. In the filter for the tweeter the capacitors are Clarity Cap MR capacitors. The serial coil for the midrange are a CFC coil and the serial capacitor is an Clarity Cap ESA. All other capacitors are Clarity Cap PWA. All other 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 with high-end-crossover without cabinet, price per speaker   EUR 2784,00 excl. VAT: € 2339.50 / $ 2503.26

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 24,00 excl. VAT: € 20.17 / $ 21.58

universal PCBs

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 150x115 mm, tin plated, price per unit:   EUR 4,70 excl. VAT: € 3.95 / $ 4.23
We recommend four boards per kit (8 boards per speaker pair)


MDF Front for Kit Donau MK2,
price per unit   on request

MDF cabinet kit for Kit Donau MK2,
price per unit   on request

Assembled MDF cabinet (without paint) for Kit Donau MK2,
price per unit   on request

Assembled cabinet with white paint for Kit Donau MK2,
price per unit   on request


measurmentsMeasurements on this speaker


PhotosPictures of this loudspeaker