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"This is an emulation of the famous Moog(R) 907 Fixed filter bank. (Moog is a registered trademark of Moog Music.)
It's an all-anlogue design that uses GIC-Circuits to emulate the Inductors of the original.
("GIC" stands for "General Impedance Converter". This is quite different from the rather noise Gyrator circuits that can often be found in electronic emulations of Inductors.)
The benefit of this design is that it behaves like an inductor - and can be (and *is*) connected to the same topology of a passive filter as in th eoriginal circuit, just like in the Moog Modular System.
Thus, the sound of this module is painstakingly close to the original, including all these notches in the frequency response that can immedately be recognized as the typical "Moog Filterbank" coloration of the sound.
You are bidding on my [JH's] personal prototype. I have originally designed it to become a MOTM (Synthesis Technology) module (which it may, or may not become, some time :) ). I liked the 19" Rackmount format better, so the prototype is in this format, with all potentiometers in a row. It has a beautiful machine-milled frontpanel from Schaeffer Apparatebau in Berlin, but it's still an open-frame construction, as th epictures show. You need a +/-15V power supply for this, like MOTM or other modular systems offer. It's likely that it will also run on +/-12V, but I have only tested in on +/-15V."
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