Sura   wall-mounted speaker as in K+T 4/2019

Technical data
  • impedance: 8 Ohm
  • sensivity (2,83V/1m): 84 dB
  • size (HxWxD): 260 x 550 x 100 mm
  • frequency range (-8dB): 39 - 29000 Hz
  • crossover frequency(s): 1200 Hz
  • speaker type: bass reflex

Sura is a two way wall-mounted speaker.

Sura is a bass-reflex cabinet loudspeaker with drivers of Wavecor .

The kit is delivered with the following drivers:
- a Wavecor TW030WA12 tweeter
- a Wavecor SW118WA02 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 2nd order low-pass filter (12 dB per octave slope) for the woofer.

The frequency response of this speaker is nearly linear.

The decay spectrum is perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,4% above 500 Hz and doesn't exceed 0,9% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Wavecor silk dome tweeter TW030WA12, 8 Ohm
  • Wavecor Subwoofer SW118WA02, 8 Ohm
  • 4x Bass reflex tube HP35, 35x125 mm, black
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Female banana jacks, red and black
  • 2m Speaker cable 2x1.5 mm2 black/red
  • 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 1.0 uF / 400 Vdc
  • Audaphon MKP CAP Superior 5.6 uF / 400 Vdc
  • Audaphon MKP CAP Superior 15 uF / 400 Vdc
  • Audaphon MKT CAP 22 uF / 160 Vdc
  • 1.0 mm air core coil, 1.2 mH/0.54 Ohm
  • 1.3 mm air core coil, 2.2 mH/0.48 Ohm
  • Metal-oxide resistor, 10W 8.2 Ohm (grey-red-gold)
  • Metal-oxide resistor, 10W 22 Ohm (red-red-black)

Kit without cabinet, price per speaker   EUR 217,00 excl. VAT: € 182.35 / $ 204.24

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 Wavecor TW030WA12 are of type polypropylen (MKP) Clarity-Cap ESA 250 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 241,00 excl. VAT: € 202.52 / $ 226.82

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).


Price per impedance correction for one speaker, to be mounted on a small wooden board.     EUR 12,30 excl. VAT: € 10.34 / $ 11.58

universal PCB

If you prefer to mount the crossover components on a universal PCB instead on wood
PCB 150x115 mm, tin plated, price per unit:   EUR 4,70 excl. VAT: € 3.95 / $ 4.42
We recommend one board per kit (2 boards per speaker pair)

Measurements

measurmentsMeasurements on this speaker

Home   Klang+Ton Overview