Thanks for the replies. I was kinda hopping they covered similar ground so my filter choice would be narrowed down! I think I will replace my 121 with the 106-6 (loads of uses, Love some of the demos, has an "alien" sound to it in some of them) my 120 with the 108 (Daft Punk filter! In some of the demos it sounds close to my old Mutator). Can anyone recommend a classy "vintage" sounding filter, a little less extreme than the 108, somthing creamy and nice 105, 106-5, 122

Another question. Which Doepfer module acts as a combi filter Is it the BBD module

Jonathan

--- In Doepfer_a100@yahoogroups.com , Florian Anwander <fanwander@...> wrote:
>
> jonathan.heslop wrote:
> > Do these three filters contain similar chips as they all share the 106 Is the A-106.6 just an "expander" version of the A-106.5
> No,
>
> 106-1 is an MS20 VCF adoption (as far as I know using a combination of
> three transistors and an opamp as kind of OTA).
>
> 106-5 is the 12db/oct state variable filter from the Oberheim SEM module
> (or Formant 12dB VCF) and uses CA3080A
>
> 106-6 is an adaption of the Oberheim Xpander Filter which uses a CEM3372
> (different possible slopes 6//12/18/24dB)
>
> Florian
>