TBTL-W6 Mk2   Floorstanding as in Hobby Hifi 4/2019

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 81 dB
  • size (HxWxD): 1040 x 210 x 370 mm
  • frequency range (-8dB): 28 - 27000 Hz
  • crossover frequency(s): 220, 4200 Hz
  • speaker type: transmission line

TBTL-W6 Mk2 is a three way floorstanding speaker.

TBTL-W6 Mk2 is a transmission-line loudspeaker with drivers of Omnes Audio and Tang Band.

The kit is delivered with the following drivers:
- a Omnes Audio AMT 50 air motion transformer (ribbon-tweeter)
- a Tang Band W4-2142 mids driver
- a Tang Band W6-1139 SIF woofer

The loudspeaker has been developed by Bernd Timmermanns.

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 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 2% above 100 Hz.

Conclusion of the magazine Hobby HiFi:

Our kit consists of

  • Omnes Audio AMT 50
  • Tang Band W6-1139SIF, 6 inch subwoofer
  • Tang Band W4-2142
  • 0,5x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 1,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Audaphon Damping 10, 970 x 470 mm, adhesive
  • Binding Post PK31, gold plated (one pair, red and black)
  • 3m Speaker cable 2x2.5 mm2, transparent
  • 1,5x Pan screws 4x20 black, 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 4.7 uF / 400 Vdc
  • Mundorf, electrolytic capacitor, etched, 150 uF/63 Vdc
  • Mundorf, electrolytic capacitor, etched, 470 uF/63 Vdc
  • Mundorf, electrolytic capacitor, unetched, 4.7 uF / 70 Vdc
  • Mundorf, electrolytic capacitor, unetched, 82uF / 50 Vdc
  • 0.7 mm air core coil, 0.22 mH/0.39 Ohm
  • 0.7 mm air core coil, 0.47 mH/0.50 Ohm
  • 0.7 mm air core coil, 0.68 mH/0.70 Ohm
  • 0.7 mm air core coil, 2.7 mH/1.53 Ohm
  • 0.7 mm air core coil, 4.7 mH/2.19 Ohm
  • 0.7 mm air core coil, 22 mH/5.61 Ohm
  • Mundorf bs100 core coil 4.7mH/0.46Ohm
  • Metal-oxide resistor, 10W 2.2 Ohm (red-red-gold)
  • Metal-oxide resistor, 10W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 5W 1.0 Ohm (brown-black-gold)
  • Metal-oxide resistor, 5W 4.7 Ohm (yellow-violet-gold)
  • Metal-oxide resistor, 5W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 336,00 excl. VAT: € 282.35 / $ 313.41

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 Omnes Audio AMT 50 are of type polypropylen (MKP) Mundorf MCAP EVO Oil / 450 V.

Kit with high-end-crossover without cabinet, price per speaker   EUR 415,00 excl. VAT: € 348.74 / $ 387.10

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 13,60 excl. VAT: € 11.43 / $ 12.69

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 / $ 7.09
We recommend one board per kit (two boards for a speaker pair)


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