Vision BS is a compact 3 way monitor that employs a 20 mm dome tweeter Visaton G20SC, a mid-/fullrange chassis Visaton B80 and a woofer Visaton TIW 200 XS. This box has been developed by Bernd Timmermanns.
The crossover consists of a 2rd order high-pass filter (12 dB per octave slope) for the tweeter, a bandpass filter (12 dB high- and 6 dB lowpass) for the two mids. The woofer is connected to a 2nd order low-pass filter.
Between 50 Hz and 17 kHz, the frequency response of this loudspeaker is nearly flat on axis. An elevation in the frequency characteristics occurs at 20000 Hz; this should not disturb. The decay spectrum is nearly perfect. At low volume, i.e. 90 dB at 1 m, the nonlinear distortions are lower than 0,5% above 200 Hz.
Kit without cabinet, price per speaker
EUR 399,00 excl. VAT: € 335.29 / $ 405.71
The high-end kit is delivered with an baked varnish I-core coil instead of an H-core coil for the woofer. In the filter for the tweeter the capacitors are Evo silver/gold/oil capacitors. Most 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 503,00 excl. VAT: € 422.69 / $ 511.45
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).
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 / $ 7.73
We recommend one board per kit (two boards for a speaker pair)
Hobby HiFi Overview