CerAL 8/4.2   Floorstanding as in K+T 3/2019

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 82 dB
  • size (HxWxD): 1100 x 190 x 320 mm
  • frequency range (-8dB): 35 - 22000 Hz
  • crossover frequency(s): Hz
  • speaker type: bass reflex

CerAL 8/4.2 is a three way floorstanding speaker.

CerAL 8/4.2 is a bass-reflex cabinet loudspeaker with drivers of Tang Band and Omnes Audio.

The kit is delivered with the following drivers:
- a Tang Band 25-1719 tweeter
- two Tang Band W4-657 mids drivers
- a Omnes Audio W8 Alu, silver woofer

The loudspeaker has been developed by Nik Baur.

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 2rd order low-pass filter (12 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 nearly 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 300 Hz and doesn't exceed 0,7% at 95 dB at 1 m between 300 and 15000 Hz.

Our kit consists of

  • Omnes Audio W8 Alu, silver
  • Tang Band 25-1719 ceramic tweeter
  • 2x Tang Band W4-657 unshielded 12 cm full range
  • Bass reflex tube HP70 XL, 70x220 mm, black
  • Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 4m Speaker cable 2x1.5 mm2, transparent
  • 1,5x Pan screws 3.5x17 black, 8 pieces
  • Pan screws 4x20 black, 8 pieces
  • Plan for DIY kit

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

  • ClarityCap PWA capacitor
  • Audaphon MKP CAP Superior / 400 Vdc
  • Audaphon MKT CAP / 160 Vdc
  • Mundorf, electrolytic capacitor, unetched / 50 Vdc
  • 1.0 mm air core coil
  • 0.7 mm air core coil
  • Mundorf H core coil H71
  • Mundorf ferrite core coil H100
  • ceramic resistor /10 Watt
  • ceramic resistor /20 Watt
  • 2x Metal-oxide resistor, 10W

Kit without cabinet, price per speaker   EUR 288,00 excl. VAT: € 242.02 / $ 271.06

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 Tang Band 25-1719 are of type polypropylen (MKP) Clarity-Cap.

Kit with high-end-crossover without cabinet, price per speaker   EUR 349,00 excl. VAT: € 293.28 / $ 328.47

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 10,00 excl. VAT: € 8.40 / $ 9.41

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 11,70 excl. VAT: € 9.83 / $ 11.01
We recommend one board per kit (2 boards per speaker pair)


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