FB-14 Mk2 Discrete Inductive Range Fixed Filter Bank
| deutsche Version |
inductive audio filterbank with discrete class A circuitry
Available again with all original circuitry. MK2 refers to minor changes to the exterior design
| - | classic class-A circuit design using coils, which have to be custom-made and thus are very costly, but they sound just so much better than standard RC-filters. Only 4 transistors in signal path, 2 of them being selected germanium types, which behave somewhat similar to vacuum tubes. | ||||
| - | 14 bands with 2-pole-filters. Center frequencies are 35, 65, 105, 160, 240, 360, 540, 800, 1200, 1800, 2700, 4000, 7000 and 12000 Hz. | ||||
| - | The choice of the frequencies in (nearly) fifth intervals avoids a false ´tonality´ (that is an unwanted emphasis or attenuation of the same musical note in different octaves) that can be found on all octave, semi-octave, and one-third-octave filterbanks. | ||||
| - | The control range per band is +/- 20 dB (!). This corresponds to a ratio of 1/100 compared to 1/16 (+/- 12dB) available on almost all other equalizers and filterbanks. So even drastic sound manipulations are possible that normally require two chained EQ´s. The q-factor of the filters gradually increases from 0.7 at +/-10 dB to 6 at +/- 20 dB. | ||||
| - | The individual filters are not decoupled from each other. Thus all kinds of - wanted - phase changes and cancellations occure. Normally this circuit design has the disadvantage of a very non-linear control curve (all relevant changes happen within a few degrees at either end of the pot´s turn). To compensate this, sealed high quality pots with a special curve are used, custom-made for us by ALPS. | ||||
| - | Input gain and output level controls. Input gain can be set from - 20 to +20dB. Due to its special circuitry, overdriving the unit produces much more interesting results than standard rc-filters using op-amps. | ||||
| - | Frequency range 20-50000Hz +/- 1.5dB, Signal-to-noise ratio 90dB. | ||||
| - | 1/4” jacks for input and output. Internal ground-lift for separating chassis and audio ground. | ||||
| - | Bypass (using a sealed relay) through frontpanel push-button and automatically when power is disconnected ("hard-wire bypass"). | ||||
| - | 19”, 1 unit, depth (behind frontpanel): 58mm + plugs, external power supply. | ||||
| - | Price: € 1260,- + VAT & freight, 5 year warranty | ||||
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For more detailed informationen please refer to the user manual "Extremely flexible and excellent sounding filterbank...", "A piece of gear with an outstanding concept, that plays in a special league and that currently has no competition worldwide." (Keyboards 1/00) "... a classy, smart piece of equipment", "Naturaly this high expense and the equally high quality has its price. But that is more than justified because the sonic results are absolutely convincing." (Keys 4/01) "Equalize it!" (Florian Schneider, Kraftwerk) |