Sonora is a two way compact speaker.
Sonora is a closed-cabinet loudspeaker with drivers of Monacor .
The kit is delivered with the following drivers:
- a Monacor RBT-1000 tweeter
- a Monacor SPH-175HQ woofer
The loudspeaker has been developed by Thomas Schmidt and Dirk Janssen.
The crossover consists of:
- a 3rd order high-pass filter (18 dB per octave slope) for the tweeter.
- a 2nd order low-pass filter (12 dB per octave slope) for the woofer.
The frequency response of this speaker is nearly linear.
The decay spectrum is nearly perfect.
At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are below 0,9% above 200 Hz and doesn't exceed 2,1% at 95 dB at 1 m between 300 and 15000 Hz.
the crossover components (right),
to be mounted on a small wooden board.
Kit without cabinet, price per speaker EUR 336,00 excl. VAT: € 282.35 / $ 302.12
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. The capacitors for the Monacor RBT-1000 are of type polypropylen (MKP) Clarity-Cap ESA 250 V.
Kit with high-end-crossover without cabinet, price per speaker EUR 363,00 excl. VAT: € 305.04 / $ 326.39
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 9,40 excl. VAT: € 7.90 / $ 8.45
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 / $ 4.23
We recommend one board per kit (2 boards per speaker pair)