Elias X2 SW275 Passiv   wall-mounted speaker as in K+T 2/2020

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 90 dB
  • size (HxWxD): 1250 x 1100 x 320 mm
  • frequency range (-8dB): 26 - 39000 Hz
  • crossover frequency(s): 180, 2100 Hz
  • speaker type: bass reflex

Elias X2 SW275 Passiv is a three way wall-mounted speaker.

Elias X2 SW275 Passiv is a bass-reflex cabinet loudspeaker with drivers of Audaphon and Wavecor.

It is available in different versions:

The kit is delivered with the following drivers:
- a Audaphon APR 1.0 ribbon-tweeter
- two Wavecor WF182CU13 mids drivers
- a WavecorSW275BD01 woofer

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

The crossover consists of:
- a 3rd order high-pass filter (18 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 0.2% above 500 Hz and doesn't exceed 0.3% at 95 dB at 1 m between 500 and 20000 Hz.

Our kit consists of

  • Audaphon Aluminium Ribbon Tweeter APR 1.0
  • 2x WF182CU13, Wavecor Mid/Woofer, 8 Ohm, paper cone, BD, phase plug
  • Wavecor Subwoofer SW275BD01, die cast alu, mica/paper laminated cone, 4 ohm
  • 2x Bass reflex tube HP70 XL, 70x220 mm, black
  • 4x Damping Sonofil 100 x 35 cm for 20 litres
  • Female banana jacks, red and black
  • 3m Speaker cable 2x1.5 mm2 black/red
  • 1,5x Pan screws 3.5x17 black, torx, 8 pieces
  • 2x Pan screws 4x20 black, torx, 8 pieces
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 82 μF; / 160 Vdc
  • Audaphon MKP CAP Superior 0.47 μF; / 400 Vdc
  • Audaphon MKP CAP Superior 4.7 μF; / 400 Vdc
  • Audaphon MKP CAP Superior 10 μF; / 400 Vdc
  • Audaphon MKT CAP 0.33 μF; / 160 Vdc
  • Audaphon MKT CAP 0.47 μF; / 160 Vdc
  • Audaphon MKT CAP 10 μF; / 160 Vdc
  • Audaphon MKT CAP 100 μF; / 160 Vdc
  • 1.3 mm air core coil, 1.0 mH/0.32 Ohm
  • 0.7 mm air core coil, 0.33 mH/0.48 Ohm
  • 0.7 mm air core coil, 0.56 mH/0.55 Ohm
  • 0.7 mm air core coil, 0.68 mH/0.70 Ohm
  • Mundorf bs140 core coil 5.6mH/0.26Ohm
  • Mundorf H core coil H71, 8.2 mH/0.8 0hm
  • ceramic resistor 6.8 Ohm/20 Watt
  • 2x ceramic resistor 12 Ohm/20 Watt
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit without cabinet, price per speaker   EUR 1550,89 excl. VAT: € 1336.97 / $ 1564.26

Price for a pair of custom speakers of any color   EUR 7526,35 excl. VAT: € 6488.23 / $ 7591.23

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 Audaphon APR 1.0 are of type polypropylen (MKP) Clarity-Cap CSA 630 V.

  • ClarityCap PWA capacitor 82 μF; / 160 Vdc
  • ClarityCap CSA capacitor 0.47μF / 630 Vdc
  • ClarityCap CSA capacitor 4.7 μF; / 630 Vdc
  • ClarityCap CSA capacitor 10 μF; / 630 Vdc
  • Audaphon MKP CAP Superior 0.33 μF; / 400 Vdc
  • Audaphon MKP CAP Superior 0.47 μF; / 400 Vdc
  • Audaphon MKP CAP Superior 10 μF; / 400 Vdc
  • Audaphon MKT CAP 100 μF; / 160 Vdc
  • Mundorf baked varnish air core coil BL71, 0.33 mH/0.48 Ohm
  • Mundorf baked varnish air core coil BL71, 0.56 mH/0.64 Ohm
  • Mundorf baked varnish air core coil BL71, 0.68 mH/0.71 Ohm
  • Mundorf baked varnish air core coil BL140, 1.0 mH/0.30 Ohm
  • Mundorf bs140 core coil 5.6mH/0.26Ohm
  • Mundorf H core baked varnish coil BH71, 8.2 mH/0.8 0hm
  • ceramic resistor 6.8 Ohm/20 Watt
  • 2x ceramic resistor 12 Ohm/20 Watt
  • Metal-oxide resistor, 10W 6.8 Ohm (blue-grey-gold)
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)
  • Metal-oxide resistor, 10W 10 Ohm (brown-black-black)
  • Metal-oxide resistor, 10W 12 Ohm (brown-red-black)

Kit with high-end-crossover without cabinet, price per speaker   EUR 1618,15 excl. VAT: € 1394.96 / $ 1632.10

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 22 μF; / 160 Vdc
  • ceramic resistor 10 Ohm/20 Watt

Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 8,04 excl. VAT: € 6.93 / $ 8.11

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 11,41 excl. VAT: € 9.84 / $ 11.51
We recommend one board per kit (2 boards per speaker pair)


Home   Klang+Ton Overview