I don't have experience with 3P, but the A-138c seems to have
advantages:
- There are four channels available, if offset is not needed.
- Setting offset to (near) zero is easy by inserting a plug to input
1.
- There is a master level control.
- It is cheaper.

Best regards
Jari Jokinen

--- In Doepfer_a100@yahoogroups.com , "ErnstKarel" <ekarel@...> wrote:
>
> Hi there --
>
> Does anyone have experience with both of these (Doepfer 138c
> polarizing mixer and Bananalogue Serge 3P), and can comment on the
> pros & cons of each
>
> If I'm understanding the descriptions properly, the input 1 knob on
> the Doepfer acts the same as the Output knob on the 3P, as
> positive/negative voltage source offset. So there are three extra
> inputs on both, plus voltage offset. Is that correct Or on
Doepfer
> do you get double the manual offset, with input 1 plus output
knobs
> Are there any other differences between them
>
> (I know there was a discussion earlier about accuracy of the 138c;
> that doesn't concern me.)
>
> Thanks in advance,
> Ernst
>