A-143-4 Quad VCLFO/VCO

The Quad VCLFO is actually almost a “real” VCO: It even has temperature compensation, which allows it to remain in tune even with external temperature fluctuations. Doepfer points out that the A-143-4 is not quite as accurate as the VCOs of the A-110 or A-111 series, but from my point of view it can be … Read more

A-110-1 Standard VCO

The A-110-1 is Doepfer’s “standard” oscillator. The “standard” sounds a bit disrespectful, is that something like a “cheap VCO with economy sound”? In terms of sound, the A-110-1 does not have to hide, not even from significantly more expensive oscillators! First of all, the waveforms on the oscilloscope don’t all look “exactly mathematical”, especially the … Read more

A-111-4 Quad Precision VCO

The family of A-111 oscillators now includes an impressive 6 variants, all of which use the Curtis chip CEM3340 (or replica) with its triangular core and allow very precise tracking over 10 octaves and more. The A-111-4 is – nomen est omen – designed fourfold and also has a common “master” section, which affects all … Read more