Movi   Shelf speaker as in K+T 4/2017

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 93 dB
  • size (HxWxD): 558 x 658 x 388 mm
  • frequency range (-8dB): 45 - 23000 Hz
  • crossover frequency(s): 140, 2300 Hz
  • speaker type: closed box

Movi is a three way compact speaker.

Movi is a closed-cabinet loudspeaker with drivers of Monacor and Visaton.

The kit is delivered with the following drivers:
- a Monacor CP-308CX coaxial driver
- two Visaton W250S 8 woofers

The loudspeaker has been developed by Holger Barske and Thomas Schmidt.

The crossover consists of:
- a 3rd order high-pass filter (18 dB per octave slope) for the tweeter part of the coaxial drive,
- a 2nd order low-pass filter (12 dB per octave slope) for the woofer part of the coaxial driver
- a 2nd order low-pass filter (12 dB per octave slope) for the woofer.

The frequency response of this speaker is not perfectly linear. The decay spectrum as shown in the waterfall diagram shows some resonances also above 2 kHz . At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are lower than 1% above 400 Hz and doesn't exceed 2.5% at 95 dB at 1 m between 400 and 10000 Hz.

An excerpt from the Klang+Ton review

Our kit consists of

  • professional coaxial driver Monacor SP-308CX
  • 2x Visaton W250 S, 4 Ohm
  • Damping Sonofil 100 x 35 cm for 20 litres
  • 2x Foam N25-30, 100 x 50 cm, black
  • Terminal T105 Au, with brass, gold plated
  • 4m Speaker cable 2x2.5 mm2, transparent
  • 2,5x Pan screws 4x20 black, 8 pieces
  • Plan for DIY kit

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

  • 3x ClarityCap PWA capacitor 2.2 μF / 160 Vdc
  • 2x ClarityCap PWA capacitor 12 μF / 160 Vdc
  • 2x ClarityCap PWA capacitor 82 μF / 160 Vdc
  • electrolytic capacitor, etched, 560 μF/63 Vdc
  • Mundorf air core coil L140, 0.56 mH/0.20 Ohm
  • 0.7 mm air core coil, 0.22 mH/0.34 Ohm
  • 0.7 mm air core coil, 10 mH/3.85 Ohm
  • Mundorf bs140 core coil 8.2mH/0.33Ohm
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 10W 5.6 Ohm (green-blue-gold)
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)

Note: We deliver foam in the form of egg crate, instead of hemp to dampen the cabinet.

Kit without cabinet, price per speaker   EUR 601,00 excl. VAT: € 505.04 / $ 545.45

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.

Kit with high-end-crossover without cabinet, price per speaker   EUR 613,00 excl. VAT: € 515.13 / $ 556.34

universal PCB

If you prefer to mount the crossover components on a 240 x 165 mm universal PCB instead on wood:
Universal PCB RA240, order no.. str-RA240, price per unit:   EUR 8,60 excl. VAT: € 7.23 / $ 7.81
We recommend one board per kit (two boards for a speaker pair)

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