BeTi 4x4   Floorstanding as in K+T 6/2018

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 88,5 dB
  • size (HxWxD): 965 x 230 x 300 mm
  • frequency range (-8dB): 48 - 28000 Hz
  • crossover frequency(s): 2000 Hz
  • speaker type: bass reflex

BeTi 4x4 is a 2,5 way floorstanding speaker.

BeTi 4x4 is a bass-reflex cabinet loudspeaker with Beryllium cone tweeter from Scan Speak and titanium cone woofer from Visaton.

The kit is delivered with the following drivers:
- a Scan Speak D3004/6040-10 tweeter
- two Visaton TI 100, 8 Ohm midrange / bass drivers
- two Visaton TI 100, 8 Ohm woofers

The loudspeaker has been developed by Bernd Timmermanns.

The crossover consists of:
- a 3rd order high-pass filter (18 dB per octave slope) for the tweeter.
- 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 perfect.

At medium volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 0,35% above 300 Hz.

Our kit consists of

  • Tweeter ScanSpeak Illuminator D3004/6040-10, beryllium
  • 4x Visaton TI 100, 8 Ohm
  • 4x Bass reflex tube HP50, 50x145 mm, black
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • Damping Sonofil 100 x 35 cm for 20 litres
  • 0,5x Audaphon Damping 10, 970 x 470 mm, adhesive
  • Binding Post PK31, gold plated (one pair, red and black)
  • 4m Speaker cable 2x2.5 mm2, transparent
  • 0,5x Spanplattenschraube 5x50 Senkkopf verzinkt, 8 Stück
  • 2,5x Pan screws 3.5x17 black, cross recess, 8 pieces
  • Plan for DIY kit

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

  • Audaphon MKP CAP Superior 10 uF / 400 Vdc
  • Audaphon MKP CAP Superior 12 uF / 400 Vdc
  • Audaphon MKP CAP Superior 15 uF / 400 Vdc
  • Audaphon MKP CAP Superior 22 uF / 400 Vdc
  • Mundorf air core coil L140, 0.82 mH/0.26 Ohm
  • Mundorf air core coil L140, 1.8 mH/0.43 Ohm
  • 1.0 mm air core coil, 0.22 mH/0.21 Ohm
  • Mundorf bs140 core coil 4.7mH/0.24Ohm
  • Metal-oxide resistor, 10W 2.2 Ohm (red-red-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 5W 0.47 Ohm 5% (yellow-purple-silver)

Kit without cabinet, price per speaker   EUR 1092,00 excl. VAT: € 917.65 / $ 1064.47

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 Tweeter are of type polypropylen (MKP) Mundorf M-Cap Evo silver/gold/oil.

Kit with high-end-crossover without cabinet, price per speaker   EUR 1330,00 excl. VAT: € 1117.65 / $ 1296.47

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 11,40 excl. VAT: € 9.58 / $ 11.11

universal PCB

If you prefer to mount the crossover components on a 240 x 165 mm universal PCB instead on wood:
Universal PCB RA240, order no.. I-2767, price per unit:   EUR 7,60 excl. VAT: € 6.39 / $ 7.41
We recommend one board per kit (two boards for a speaker pair)


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