Doepfer A-101-6 Opto FET VCF/Phaser wireless-speakers Item Number: 10

Item Number: 10

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Doepfer A-101-6 Opto FET VCF/Phaser wireless-speakers Item Number: 10A 101 6 is a new filter module that uses so called "Opto FETs" to control the frequency. Opto Fets are similar in structure to Vactrols , but use is made of photosensitive field effect transistors ( FETs ) instead of photosensitive resistors (LDRs). Opto FETs incorporate a photosensitive FET and a light emitting diode in a common, light tight housing. The advantage over Vactrols is that Opto FETs are much faster than LDRs and thus very short attacks