Aurum 2   Floorstanding as in K+T 5/2021

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 91 dB
  • size (HxWxD): 1000 x 280 x 420 mm
  • frequency range (-8dB): 40 - 22000 Hz
  • crossover frequency(s): 2800 Hz
  • speaker type: bass reflex

Aurum 2 is a two way floorstanding speaker.

Aurum 2 is a bass-reflex cabinet loudspeaker with drivers of Monacor and Visaton.

The kit is delivered with the following drivers:
- a Monacor MRD-34PA mit Dayton H08RW horn with driver
- a Visaton BG 20, 8 Ohm woofer

The loudspeaker has been developed by Ronald Waßen and Markus Schäpermeier.

The crossover consists of:
- a 3rd order high-pass filter (18 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 1% above 200 Hz and doesn't exceed 3% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Dayton H08RW 8 inch Round Waveguide 1 inch threaded
  • Monacor MRD-34PA, 1 inch Horn Driver
  • Visaton BG 20, 8 Ohm
  • Vifa compensation Magnet 90mm
  • 0,1xAudaphon Damping 10, 970 x 470 mm, adhesive
  • 3x Binding Post PK31, gold plated (one pair, red and black)
  • 3m Speaker cable 2x1.5 mm2, transparent
  • 2x Pan screws 3.5x17 black, torx, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 1.8 μF / 400 Vdc
  • Audaphon MKP CAP Superior 5.6 μF / 400 Vdc
  • Audaphon MKT CAP 1.5 μF / 160 Vdc
  • 2x Audaphon MKT CAP 10 μF / 160 Vdc
  • Audaphon MKT CAP 15 μF / 160 Vdc
  • Mundorf baked varnish air core coil BL71, 0.33 mH/0.48 Ohm
  • Mundorf baked varnish air core coil BL71, 2.2 mH/1.3 Ohm
  • Mundorf baked varnish air core coil BL140, 0.75 mH
  • Mundorf baked varnish air core coil BL140, 2.0 mH/0.45 Ohm
  • Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
  • 2x Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker   EUR 276,00 excl. VAT: € 231.93 / $ 245.85

Additionally you need for damping the cabinet Basotect and mineral wool and for the tweeter modification plastic-fermit.

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 Monacor MRD-34PA mit Dayton H08RW are of type polypropylen (MKP) Clarity-Cap ESA 630 V.

  • ClarityCap ESA capacitor 1.8 μF / 630 Vdc
  • ClarityCap ESA capacitor 5.6 μF / 630 Vdc
  • Audaphon MKP CAP Superior 1.5 μF / 400 Vdc
  • 2x Audaphon MKP CAP Superior 10 μF / 400 Vdc
  • Audaphon MKP CAP Superior 15 μF / 400 Vdc
  • Mundorf baked varnish air core coil BL71, 0.33 mH/0.48 Ohm
  • Mundorf baked varnish air core coil BL71, 2.2 mH/1.3 Ohm
  • Mundorf baked varnish air core coil BL140, 0.75 mH
  • Mundorf baked varnish air core coil BL140, 2.0 mH/0.45 Ohm
  • Metal-oxide resistor, 10W 1.8 Ohm (brown-grey-gold)
  • 2x Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 313,00 excl. VAT: € 263.03 / $ 278.81

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 3.9 μF / 160 Vdc
  • 0.7 mm air core coil, 0.82 mH/0.89 Ohm
  • ceramic resistor 8.2 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 11,90 excl. VAT: € 10.00 / $ 10.60

universal PCB

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 11,80 excl. VAT: € 9.92 / $ 10.51
We recommend one board per kit (2 boards per speaker pair)


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