Ophelia floorstanding contains a Scan Speak dome tweeter with beryllium dome and two Scan Speak 18W/8531G00. It is developed by Holger Barske und Thomas Schmidt.
Ophelia is a bassreflex loudspeaker.
The crossover consists of a 2rd order high-pass filter (12 dB per octave slope) to control the silk dome tweeter and 2nd order low-pass filter for the control of the mid-woofer. Parallel to tweeter and mid-woofer still absorption circuits are arranged which correct the frequency characteristics without worsening the impulse accuracy.
The frequency response is quite flat, the harmonic distortion is absolutely low. This only can be found in top-class speakers. The decay spectrum shows a small resonance at 450 Hz; apart from that it is without any fault.
Instead of Damping 30 we deliver in our kit Bondum 800.
Our high-end version employs one Rike oil paper capacitor in series to the tweeter. In series to the woofer Mundorf copper foil coils are used.
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 / $ 7.09
We recommend two boards per kit (four boards for a speaker pair)