Orophin   Shelf speaker as in Newsletter

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 83 dB
  • size (HxWxD): 360 x 180 x 270 mm
  • frequency range (-8dB): 45 - 25000 Hz
  • crossover frequency(s): 3000 Hz
  • speaker type: bass reflex
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Orophin is a two way compact speaker.

Orophin is a bass-reflex cabinet loudspeaker with drivers of Mundorf and ScanSpeak.

The kit is delivered with the following drivers:
- a Mundorf AMT 19CM1.1-C tweeter
- a ScanSpeak 15W8530 K00 woofer

The loudspeaker has been developed by Marek Held.

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 perfectly linear.

The decay spectrum is perfect.

Our kit consists of

  • Mundorf AMT 19CM1.1-C
  • ScanSpeak woofer 15W8530 K00 (Revel.), 1/2 package
  • Bass reflex tube HP50, 50x143mm, black
  • 0,5x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK28 I, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 400 Vdc
  • 2x Audaphon MKT CAP 160 Vdc
  • Mundorf air core coil L50
  • 1.0 mm air core coil
  • Metal-oxide resistor, 10W
  • Metal-oxide resistor, 10W
  • Metal-oxide resistor, 10W

Kit without cabinet, price per speaker   EUR 639,00 excl. VAT: € 536.97 / $ 553.08

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 AMT 19CM1.1-C are of type polypropylen (MKP) Clarity-Cap CSA 630 V.

  • ClarityCap CSA capacitor 630 Vdc
  • 2x Audaphon MKP CAP Superior 400 Vdc
  • Mundorf baked varnish air core coil BL71
  • Mundorf baked varnish air core coil BL100
  • Metal-oxide resistor, 10W
  • Metal-oxide resistor, 10W
  • Metal-oxide resistor, 10W

Kit with high-end-crossover without cabinet, price per speaker   EUR 682,00 excl. VAT: € 573.11 / $ 590.30

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 160 Vdc
  • 0.7 mm air core coil
  • ceramic resistor 20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 9,50 excl. VAT: € 7.98 / $ 8.22

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 / $ 3.64
We recommend one board per kit (two boards for a speaker pair)


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