TL90   Floorstanding as in Hobby HiFi 5/2015

Technical data
  • impedance: 4 Ohm
  • sensivity (2,83V/1m): 85 dB
  • size (HxWxD): 790 x 122 x 292 mm
  • frequency range (-8dB): 50 - 30000 Hz
  • crossover frequency(s): Hz
  • speaker type: transmission line

TL90 is a small transmission line floorstander that employs a Wavecor fullrange loudspeaker FR090 WA01. TL90 has been developed by Bernd Timmermanns.

The crossover consists of two LRC notch filter wired in series.

Our kit consists of

  • Wavecor Fullrange FR090WA01, 4 Ohm
  • 1,5x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 1,5m Speaker cable 2x1.5 mm2, transparent
  • 0,5x Pan screws 4x20 black, cross recess, 8 pieces
  • Plan for DIY kit

the crossover components (right),
to be mounted on a small wooden board.
  • electrolytic capacitor, unetched, 1 μF / 70 Vdc
  • electrolytic capacitor, unetched, 15uF / 70 Vdc
  • 1.0 mm air core coil, 0.22 mH/0.21 Ohm
  • 1.0 mm air core coil, 0.047mH/0.09 Ohm
  • Metal-oxide resistor, 5W 3.3 Ohm (orange-orange-gold)
  • Metal-oxide resistor, 5W 4.7 Ohm (yellow-violet-gold)

Kit without cabinet, price per speaker   - not available

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.. str-RA240, price per unit:   EUR 8,60 excl. VAT: € 7.23 / $ 8.38
We recommend half a board per kit (one board for a speaker pair)

Kit with high-end crossover

Kit without cabinet, price per speaker   EUR 157,00 excl. VAT: € 131.93 / $ 153.04

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.. str-RA240, price per unit:   EUR 8,60 excl. VAT: € 7.23 / $ 8.38
We recommend half a board per kit (one board for a speaker pair)

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.     - not available

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