Scan Concert is a two-way bassreflex bookshelf speaker with high quality drivers from Scan-Speak. Tweeter Scan-Speak D2905/9300 is working in the upper frequency range and Scan-Speak 15W/4531G00 is for the lower frequency range.
Scan Concert has been developed by Wolfgang Grasshoff.
The crossover consists of a third order high-pass filter (18 dB per octave slope) for the tweeter. A voltage divider reduces the volume . The woofer is connected to a 2nd order low-pass filter.
Between 80 Hz and 20000 Hz, the frequency response is nearly flat. Apart from some weak resonances the decay spectrum is perfect. At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are lower than 0.5% above 700 Hz and stays below 1% at 95 dB at 1 m .
the crossover components (right),
to be mounted on a small wooden board.
Kit without cabinet, price per speaker EUR 412,00 excl. VAT: € 346.22 / $ 366.99
The high-end kit is delivered with baked varnish air core 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. All capacitors are of type MKP (polypropylen) and in series to the tweeter Clarity Caps of type ESA 250 V are employed.
Kit with high-end-crossover without cabinet, price per speaker EUR 465,00 excl. VAT: € 390.76 / $ 414.20
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 universal PCB instead on wood
PCB 150x115 mm, tin plated, price per unit: EUR 4,70 excl. VAT: € 3.95 / $ 4.19
We recommend one board per kit (2 boards per speaker pair)