Sirius is an high-end 4 way floorstanding speaker with high quality chassis and dipole tweeter . The kit provides an air motion tranformer of highest quality Audaphon AMT 1i. To be adapted to the room acoustics on the rear is an Audiopur AMT13M as dipole. The Wavecor WF182CU13 is used as midrange and Wavecor SW223BD02 with two passive radiators bring out a deep bass.
Sirius is developed by Daniel Gattig and Dennis Frank.
The crossover consists of a 3rd order high-pass filter (18 dB per octave slope) for the tweeter, a 2nd order bandpasss filter with an voltage divider for the midrange and a 2nd order lowpass with parallel RCL to reduce the impedance for the woofer. On the rear an air motion transformer with level control is used to adapt the loudspeaker to the room properties. It is connected to a 1st order high-pass filter.
The freqeuncy response of this speaker a very linear. The decay spectrum is nearly perfect. At low volume, i.e. 85 dB at 1 m, the nonlinear distortion is lower than 0.1% between 600 and 6000 Hz; at a level of 95 dB at 1 m the distortion is below 0.2%.
the crossover components (right),
to be mounted on a small wooden board.
Kit without cabinet, price per speaker EUR 1468,00
The high-end kit is delivered with copper foil and backlack air coils on important parts of the crossover 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 foil capacitors of type polypropylen (MKP) and for the tweeter even Clarity-Cap ESA 250 V are employed.
Kit with high-end-crossover without cabinet, price per speaker EUR 1572,00
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
We recommend three boards per kit (6 boards per speaker pair)