FR10-TL   Floorstanding as in Hobby Hifi 1/2017

Technical data
  • impedance: 6 Ohm
  • sensivity (2,83V/1m): 84 dB
  • size (HxWxD): 880 x 148 x 280 mm
  • frequency range (-8dB): 50 - 22000 Hz
  • crossover frequency(s): 3300 Hz
  • speaker type: transmission line

FR10 TL is a slim floorstanding speaker that employs a Visaton FR10 8 Ohm woofer and a Visaton DTW 72 8 Ohm tweeter.

FR10 TL has been developed by Bernd Timmermanns.

Its transmission line cabinet ensures a punchy bass and precise bass.

The crossover consists of a 2nd order high-pass filter (12 dB per octave slope) for the tweeter. A RCL curcuit in parallel to the tweeter is smoothing the frequency response of the tweeter. The woofer is connected to a 3rd order low-pass filter (18 dB per octave slope).

Between 60 Hz and 20 kHz, the frequency response of this loudspeaker is nearly linear on axis. The decay spectrum is without fault. At low volume, i.e. 90 dB at 1 m, the nonlinear distortions are below 1% above 300 Hz.

Our kit consists of

  • Visaton FR 10, 8 Ohm
  • Visaton DTW 72, 8 Ohm
  • 0,5x Damping fleece MT Bondum 800 (30 x 50 x 2 cm)
  • 0,5x PE sealing tape, 5x2 mm, 7.5 m
  • 0,5x Damping Sonofil 100 x 35 cm for 20 litres
  • Binding Post PK31, gold plated (one pair, red and black)
  • 2m Speaker cable 2x1.5 mm2, transparent
  • 0,5x Pan screws 3.5x17 black, cross recess, 8 pieces
  • 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, etched, 10 μF/100 Vdc
  • electrolytic capacitor, unetched, 1 μF / 70 Vdc
  • electrolytic capacitor, unetched, 2.2 μF / 70 Vdc
  • Mundorf air core coil L50, 0.1 mH/0.38 0hm
  • Mundorf air core coil L50, 0.47 mH/0.93 0hm
  • 1.0 mm air core coil, 0.47 mH/0.32 Ohm
  • 1.0 mm air core coil, 1.8 mH/0.7 Ohm
  • Metal-oxide resistor, 10W 15 Ohm (brown-green-black)
  • Metal-oxide resistor, 5W 10 Ohm (brown-black-black)
  • Metal-oxide resistor, 5W 15 Ohm (brown-green-black)

Kit without cabinet, price per speaker   EUR 89,00 excl. VAT: € 74.79 / $ 80.03

Kit with high-end crossover

The high-end kit comes with MKP capacitors for the tweeter. All inductances are baked varnished coils 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.

Kit with high-end-crossover without cabinet, price per speaker   EUR 122,00 excl. VAT: € 102.52 / $ 109.70

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 9,70 excl. VAT: € 8.15 / $ 8.72

universal PCBs

If you prefer to mount the crossover components on a 159 x 127 mm universal PCB instead on wood:
Universal PCB RA160, order no.. str-RA160, price per unit:   EUR 5,90 excl. VAT: € 4.96 / $ 5.31
We recommend one board per kit (two boards for a speaker pair)

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