The SB Horn is horn speaker with drivers from SB Acoustics. The SB Horn is home to a SB12PAC25-4 woofer and SB25ADC-C000-4 tweeter.
SB Horn has been developed by Bernd Timmermanns.
Its crossover consists of a 3rd order high-pass for the tweeter. A resistor as voltage divider in series to the tweeter got a capacitor in parallel to lift the highest frequencies. The woofer is connected to a 2nd order low pass filter.
The frequency response is flat on axis between 50 Hz and 40,000 Hz except a peak at 100 to 140 Hz. The decay spectrum (waterfall diagram over frequency) is without resonances above 2 kHz. At 90 dB and 1 m, non-linear distortions remain below 0.5 % above 300 Hz.
the crossover components (right),
to be mounted on a small wooden board.
Kit without cabinet, price per speaker EUR 129,00 excl. VAT: € 108.40 / $ 127.92
The high-end kit contains Mundorf EVO oil capacitors. All coils are backed varnish coils for diminishing the microphonics effect. Current flowing through the coil creates a magnetic field which on itself sets the reel of wire in motion. That motion induces a voltage in the coil which adds itself to the original signal.
Kit with high-end-crossover without cabinet, price per speaker EUR 201,00 excl. VAT: € 168.91 / $ 199.31
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 140 x 102 mm universal PCB instead on wood:
Universal PCB RA140, order no.. str-RA140, price per unit: EUR 4,20 excl. VAT: € 3.53 / $ 4.16
We recommend one board per kit (two boards for a speaker pair)
Hobby HiFi Overview