No.4 Royal is an high quality compact speaker with fullrange driver. The fullrange speaker is the Tang Band W4-1879.
No.4 Royal is developed by Thorsten Fischer.
The crossover consists of two wave trap circuits smoothing the frequency response.
The frequency response of this speaker is linear. The decay spectrum shows small artifacts in the midrange, but this artifacts are no problem for the sound. At low volume, i.e. 85 dB at 1 m, the nonlinear distortions are lower than 0.5% above 500 Hz and doesn't exceed 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 227,13 excl. VAT: € 195.80 / $ 229.09
The high-end kit is delivered with backlack air 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 Clarity-Cap ESA 250 V.
Kit with high-end-crossover without cabinet, price per speaker EUR 251,50 excl. VAT: € 216.81 / $ 253.67
If you prefer to mount the crossover components on a 140 x 102 mm universal PCB instead on wood:
Universal PCB RA140, order no.. I-2765, price per unit: EUR 3,61 excl. VAT: € 3.11 / $ 3.64
We recommend one board per kit (two boards for a speaker pair)