Copernicus teilaktiv   wall-mounted speaker as in K+T 2/2022

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 91 dB
  • size (HxWxD): 1800 x 600 x 300 mm
  • frequency range (-8dB): 25 - 30000 Hz
  • crossover frequency(s): 65, 260, 2100 Hz
  • speaker type: closed box

Copernicus Teilaktiv is a four way wall-mounted speaker.

Copernicus exists in five variants:

Copernicus Teilaktiv is a closed-cabinet loudspeaker with drivers of Mundorf and Wavecor.

The kit is delivered with the following drivers:
- a Mundorf AMTU160W1.1-R air motion transformer (ribbon-tweeter)
- two Wavecor WF182CU13 mids drivers
- a Wavecor WF259PA01 woofer
- two Wavecor SW275BD01 subwoofers

The loudspeaker has been developed by Dennis Frank and Daniel Gattig.

The crossover consists of:
- a 2nd order high-pass filter (12 dB per octave slope) for the tweeter.
- a band pass consisting of a 2nd order high pass filter (12 dB per octave slope) and a 3rd order low-pass filter (18 dB per octave slope) for the mids-woofer.
- 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 as shown in the waterfall diagram is exemplary, free of any disturbing resonance.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,5% above 500 Hz and doesn't exceed 0,6% at 95 dB at 1 m between 300 and 15000 Hz.

An excerpt from the Klang+Ton review (Translation of the author into English)

"The Copernicus´ performance with the free-field setting directly in front of the wall is impressing, but in the long run it is clearly too powerful. So I first turned the bass department down by about 6 decibels - that´s better. The impression of infinitely deep and dynamic bass is retained, but it doesn't immediately jump in the listener's face (or stomach). This impression extends over the entire audible frequency range: you can clearly hear that there is significantly more membrane area in every position than with your standard loudspeakers. And because the whole thing is so beautifully linear and without any distortion, you can always get really loud without stressing your ears - very good! When it comes to home cinema, things are going just as well... I caught myself stepping on the gas on the subs for the correct doomsday soundtrack à la "Independance Day" or "2012" - but then that's not entirely possible without worrying about the building´s structural integrity…. "

Conclusion of the magazine Klang+Ton:

" Perfectly tuned wall box with an integrated subwoofer solution that leaves no desires whatsoever. "

"High-end tip"

Our kit consists of

  • 2x WF182CU13, Wavecor Mid/Woofer, 8 Ohm, paper cone, BD, phase plug
  • Mundorf AMTU160W1.1-R
  • Wavecor WF259PA01, 8 Ohm, professional woofer
  • 2x Wavecor Subwoofer SW275BD01, die cast alu, mica/paper laminated cone, 4 ohm
  • Hypex FusionAmp FA252
  • Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 9x Damping Sonofil 100 x 35 cm for 20 litres
  • 3x Binding Post PK28 I, gold plated (one pair, red and black)
  • 3m Speaker cable 2x1.5 mm2 black/red
  • 1,5x Pan screws 3.5x17 black, torx, 8 pieces
  • 1,5x Pan screws 4x20 black, torx, 8 pieces
  • 3x Allen wood screws, black, 5x30 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 μF / 400 Vdc
  • Audaphon MKP CAP Superior 8.2 μF / 400 Vdc
  • Audaphon MKT CAP 10 μF / 160 Vdc
  • Audaphon MKT CAP 68 μF / 160 Vdc
  • Mundorf, electrolytic capacitor, etched, 270 μF/63 Vdc
  • JB, electrolytic capacitor, bipolar, 82 μF/100 Vdc
  • JB, electrolytic capacitor, bipolar, 220 μF/100 Vdc
  • 1.0 mm air core coil, 0.22 mH/0.21 Ohm
  • 1.4 mm air core coil, 1.0 mH/0.29 Ohm
  • 0.7 mm air core coil, 0.47 mH/0.50 Ohm
  • Mundorf bs140 core coil 8.2 mH/0.33Ohm
  • 2x Mundorf H core coil H71, 10 mH/0.87 0hm
  • ceramic resistor 2.7 Ohm/20 Watt
  • 2x ceramic resistor 15 Ohm/20 Watt
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • 2x Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)

Kit without cabinet, price per speaker   EUR 3014,00 excl. VAT: € 2532.77 / $ 2684.74

Price for a pair of custom speakers of any color   EUR 14285,00 excl. VAT: € 12004.20 / $ 12724.45

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. The capacitors for the Mundorf AMTU160W1.1-R are of type polypropylen (MKP) Clarity Cap CSA.

  • ClarityCap PX capacitor 68 μF / 250 Vdc
  • ClarityCap CSA capacitor 8.2 μF / 630 Vdc
  • ClarityCap CSA capacitor 4.7 μF / 250 Vdc
  • Audaphon MKP CAP Superior 10 μF / 400 Vdc
  • Mundorf, electrolytic capacitor, etched, 270 μF/63 Vdc
  • JB, electrolytic capacitor, bipolar, 82 μF/100 Vdc
  • JB, electrolytic capacitor, bipolar, 220 μF/100 Vdc
  • Mundorf baked varnish air core coil BL71, 0.47 mH/0.57 Ohm
  • Mundorf baked varnish air core coil BL100, 0.22 mH/0.21 Ohm
  • Mundorf baked varnish air core coil BL140, 1.0 mH/0.30 Ohm
  • Mundorf bs180 core coil 8.2 mH/0.21 Ohm
  • 2x Mundorf H core baked varnish coil BH71, 10 mH/0.87 0hm
  • ceramic resistor 2.7 Ohm/20 Watt
  • 2x ceramic resistor 15 Ohm/20 Watt
  • Metal-oxide resistor, 10W 3.9 Ohm (orange-white-gold)
  • 2x Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)

Kit with high-end-crossover without cabinet, price per speaker   EUR 3111,00 excl. VAT: € 2614.29 / $ 2771.14

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).

  • JB, electrolytic capacitor, bipolar, 100 μF/100 Vdc
  • 0.7 mm air core coil, 0.10 mH/0.27 Ohm
  • ceramic resistor 10 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 9,50 excl. VAT: € 7.98 / $ 8.46

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)

Measurements

measurmentsMeasurements on this speaker

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