MuViStar XS   Shelf speaker as in K+T 5/2022

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 82 dB
  • size (HxWxD): 230 x 156 x 221 mm
  • frequency range (-8dB): 70 - 40000 Hz
  • crossover frequency(s): 3300 Hz
  • speaker type: closed box

MuViStar XS is a two way compact speaker.

MuViStar XS is a closed-cabinet loudspeaker with drivers of Mundorf and Visaton.

The kit is delivered with the following drivers:
- a Mundorf AMTU40W1.2-C air motion transformer (ribbon-tweeter)
- a Visaton TI 100, 8 Ohm 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 3rd order low-pass filter (18 dB per octave slope) for the woofer.

The frequency response of this speaker is nearly linear.

The decay spectrum is nearly perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,5% above 300 Hz and doesn't exceed 1,4% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Mundorf AMTU40W1.2-C
  • Visaton TI 100, 8 Ohm
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 1,5m Speaker cable 2x1.5 mm2, transparent
  • 0,5x Pan screws 3.5x17 black, torx, 8 pieces
  • 0,5x Visaton Countersunk screws 3.5x25, 8 pcs

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

  • Audaphon MKP CAP Superior 5.6 μF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 μF / 400 Vdc
  • 1.0 mm air core coil, 0.39 mH/0.29 Ohm
  • 1.0 mm air core coil, 2.2 mH/0.89 Ohm
  • 0.7 mm air core coil, 0.22 mH/0.34 Ohm
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)

Kit without cabinet, price per speaker   EUR 430,00 excl. VAT: € 361.34 / $ 361.34

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 Mundorf AMTU40W1.2-C are of type polypropylen (MKP) Clarity-Cap CSA 250 V.

  • ClarityCap CSA capacitor 8.2 μF / 250 Vdc
  • Audaphon MKP CAP Superior 5.6 μF / 400 Vdc
  • Mundorf baked varnish air core coil BL71, 0.22 mH/0.34 Ohm
  • Mundorf baked varnish air core coil BL100, 0.39 mH/0.29 Ohm
  • Mundorf baked varnish air core coil BL100, 2.2 mH/0.83 Ohm
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 466,00 excl. VAT: € 391.60 / $ 391.60

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).

  • Audaphon MKT CAP 47 μF / 160 Vdc
  • 0.7 mm air core coil, 0.56 mH/0.55 Ohm
  • ceramic resistor 15 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 18,70 excl. VAT: € 15.71 / $ 15.71

universal PCB

If you prefer to mount the crossover components on a 140 x 102 mm universal PCB instead on wood:
Universal PCB RA140, order no.. str-RA140, price per unit:   EUR 4,20 excl. VAT: € 3.53 / $ 3.53
We recommend one board per kit (two boards for a speaker pair)


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