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

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 91 dB
  • size (HxWxD): 1250 x 1100 x 320 mm
  • frequency range (-8dB): 45 - 39000 Hz
  • crossover frequency(s): 2200 Hz
  • speaker type: bass reflex

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

Elias X2 SW275 Top 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 woofers

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 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 0,3% above 500 Hz and doesn't exceed 0,5% at 95 dB at 1 m between 500 and 20000 Hz.

An excerpt from the Klang+Ton review

Conclusion of the magazine Klang+Ton:

Our kit consists of

  • Audaphon Aluminium Ribbon Tweeter APR 1.0
  • 2x WF182CU13, Wavecor Mid/Woofer, 8 Ohm, paper cone, BD, phase plug
  • 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
  • 2m Speaker cable 2x1.5 mm2 black/red
  • 1,5x Pan screws 3.5x17 black, torx, 8 pieces
  • 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 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 15 μF; / 160 Vdc
  • 1.3 mm air core coil, 0.68 mH/0.22 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
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • 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 911,43 excl. VAT: € 785.72 / $ 919.29

Price for a pair of custom speakers of any color   EUR 5779,53 excl. VAT: € 4982.35 / $ 5829.35

Kit with high-end crossover

The high-end kit is delivered with baked varnish air core coils 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 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 15 μF; / 400 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, 0.68 mH/0.23 Ohm
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • 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 973,82 excl. VAT: € 839.50 / $ 982.22

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)


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