Mo-Line   Floorstanding as in K+T 3/2016

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 85 dB
  • size (HxWxD): 1038 x 268 x 419 mm
  • frequency range (-8dB): 31 - 40000 Hz
  • crossover frequency(s): 3200 Hz
  • speaker type: transmission line

Mo-Line is a 2 way transmissionline floorstanding speaker with drivers of high quality from Monacor.

Mo-Line is developed by Frank Kuhl.

The transmissionline enclosure improves the low-frequency response of the loudspeaker system.

In Mo-Line the Monacor SPH-220HQ, with a stable die-cast alu basket and a linear frequency response is used. In the upper frequency range the Monacor RBT-20 ribbon tweeter is used.

The crossover consists of a third order high-pass filter (18 dB per octave slope) for the tweeter. The woofer is connected to a one-and-half order low-pass filter. A series-resonant-circuit is smoothing the frequency response of the tweeter.

Between 40 Hz and 20000 Hz, the frequency response of this loudspeaker is very linear. The decay spectrum is nearly perfect. At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are lower than 0.5% above 300 Hz and doesn't exceed 1,5% at 95 dB at 1 m .

Our kit consists of

  • ribbon tweeter Monacor RBT-20
  • woofer Monacor SPH-220HQ
  • PE sealing tape, 5x2 mm
  • 1,5x Damping Sonofil 100 x 35 cm for 20 litres
  • 2x Foam N25, 100x50x4 cm, black
  • Binding Post PK31, gold plated (one pair, red and black)
  • 3m Speaker cable 2x1.5 mm2, transparent
  • 1,5x Allen wood screws, black, 4x25 mm, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 4.7 uF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 uF / 400 Vdc
  • MKT capacitor 3.0 uF / 250Vdc
  • Audaphon MKT CAP 1.0 uF / 160 Vdc
  • 2x Audaphon MKT CAP 15 uF / 160 Vdc
  • Mundorf air core coil L140, 3.3 mH/0.58 Ohm
  • 1.0 mm air core coil, 0.22 mH/0.21 Ohm
  • 1.0 mm air core coil, 0.82 mH/0.44 Ohm
  • 1.3 mm air core coil, 0.68 mH/0.22 Ohm
  • 0.7 mm air core coil, 0.05 mH
  • ceramic resistor 5.6 Ohm/20 Watt
  • ceramic resistor 10 Ohm/20 Watt
  • Metal-oxide resistor, 10W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)

Kit without cabinet, price per speaker   EUR 369,00 excl. VAT: € 310.08 / $ 359.70

Kit with high-end crossover

The high-end kit is delivered with baked varnish air core 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. The capacitors for the tweeter are ClarityCap ESA 250V, ClarityCaps PX and Audaphon MKP capacitors.

Kit with high-end-crossover without cabinet, price per speaker   EUR 412,00 excl. VAT: € 346.22 / $ 401.61

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 11,15 excl. VAT: € 9.37 / $ 10.87

universal PCBs

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 / $ 11.41
We recommend one board per kit (two boards for a speaker pair)


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