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unanswered Two different 4-Pole versions!

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3 years 11 months ago - 3 years 11 months ago #1 by Qwave
Qwave created the topic: Two different 4-Pole versions!
There are two different 4-Pole versions with a very different sound:
The first version uses a Curtis CEM 3387 chip. To notice these revision, you just have to check the power voltage: if its labled with 9 Volts, it is this version.

The later 12 Volt version uses the same filter as the original Waldorf Pulse. It is based on a transistor array chip CA3046 for the famous transistor ladder filter we all know.

These two revisions are not sound compatible!

The envelope times, the cutoff and the resonance are different scaled.

The Curtis filter versions sounds more transparent and has a nice resonance without loosing bass on higher settings. The Pulse filter sounded more powerful. But bass level dropped on higher resonance settings (a typical Moog filter thing).

Pictures © Georg "swissdoc" Müller 2008
as seen on faq.waldorfian.info/4-pole-inside.html
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Last Edit: 3 years 11 months ago by Qwave.
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