Ypsilon   Floorstanding as in K+T 5/2019

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 92 dB
  • size (HxWxD): 2000 x 280 x 530 mm
  • frequency range (-8dB): 24 - 28000 Hz
  • crossover frequency(s): 220,1150 Hz
  • speaker type: bass reflex

Ypsilon is a three way floorstanding speaker.

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

The kit is delivered with the following drivers:
- a Wavecor TW030WA11 tweeter
- two Wavecor WF152CU13 mids drivers
- four Wavecor WF223BD01 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 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 is nearly perfect.

At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0.6% above 400 Hz and doesn't exceed 0.8% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Wavecor silk dome tweeter TW030WA11, 4 Ohm
  • 2x WF152CU13, Wavecor Mid/Woofer, 8 Ohm, paper / glass fiber, BD, phase plug
  • 4x Wavecor Mid/Woofer WF223BD01 paper / glass fiber, 4 Ohm
  • 2x Bass reflex tube HP100, 100x200 mm, black
  • 6x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 12x Damping Sonofil 100 x 35 cm for 20 litres
  • 3x Female banana jacks, red and black
  • Binding Post PK28 I, gold plated (one pair, red and black)
  • 6x Premium Hollow Tip, Gold
  • 6m Speaker cable 2x1.5 mm2 black/red
  • 3x Allen wood screws, black, 5x30 mm, 8 pieces
  • 1,5x Allen wood screws, black, 4x25 mm, 8 pieces
  • 6x Adam Hall 4907 rubber foot
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor 100uF / 160 Vdc
  • Audaphon MKP CAP Superior 15 μF / 400 Vdc
  • 2x Audaphon MKP CAP Superior 22 μF / 400 Vdc
  • electrolytic capacitor, etched, 100 μF/100 Vdc
  • electrolytic capacitor, etched, 220 μF/63 Vdc
  • electrolytic capacitor, etched, 330 μF/63 Vdc
  • electrolytic capacitor, unetched, 47uF / 50 Vdc
  • Mundorf air core coil L140, 0.47 mH/0.19 Ohm
  • 1.3 mm air core coil, 1.5 mH/0.40 Ohm
  • 0.7 mm air core coil, 0.56 mH/0.55 Ohm
  • 0.7 mm air core coil, 0.033 mH
  • Mundorf bs140 core coil 6.8mH/0.3Ohm
  • Mundorf H core coil H71, 10 mH/0.87 0hm
  • Mundorf H core coil H71, 27 mH/1.68 0hm
  • ceramic resistor 2.7 Ohm/20 Watt
  • ceramic resistor 6.8 Ohm/20 Watt
  • Metal-oxide resistor, 10W 3.3 Ohm (orange-orange-gold)

Kit without cabinet, price per speaker   EUR 1901,00 excl. VAT: € 1597.48 / $ 1709.30

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 TW030WA11 are of type polypropylen (MKP) Clarity-Cap ESA 250 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 1979,00 excl. VAT: € 1663.03 / $ 1779.44

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 28,30 excl. VAT: € 23.78 / $ 25.45

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 / $ 4.23
We recommend two boards per kit (4 boards per speaker pair)


measurmentsMeasurements on this speaker


PhotosPictures of this loudspeaker

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