Doepfer

Before we continue this endless theoretical discussion ....

Simply connect the A-100 output to your mixer/amplifier/soundcard ...

I've never heard during the last 10 years of any problem with the A-100
impedance. And there is not "the A-100 impedance" as each module is
different. The ~ 10k I mentioned is valid only for the A-130/131 and A-138.
Other modules (e.g. filters, phasers, BBD, frequency shifter....) may have
different output impedances but we never specified the output impedances of
the modules as this was never a problem (at least I never heard of such
problems).

Best wishes
Dieter Doepfer

P.S. I'm about to leave the office for about one week. Consequently no
response from me until July 17, 2006.


> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com
> [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von klinic2
> Gesendet: Freitag, 7. Juli 2006 15:04
> An: Doepfer_a100@yahoogroups.com
> Betreff: [Doepfer_a100] Re: output impedance of a patch and DI ???
>
>
> Hi Dieter,
>
> Its really the A-100 such high impedance? I mean 10k output impedance...
>
> In reality sometimes the specifications of gear specified the
> impedance the output want to "see" ie. the input impedance of the
> next gear in the chain, not the actual output impedance.
>
> For example the output impedance of a electric guitar is about 10K
> (not Meg.!!) so it expect an input with at least 10x the impedance,
> in this case 100K or more. A microphone output impedance is about
> 200Ohm, thats why mic preamp input impedance is around 2K... Pro gear
> use 10K inputs or old gear 600Ohm inputs and usually pro gear have a
> low output impedance (600Ohm or less, usually less than 100Ohm) Thats
> why I shocked when you say the low impedance of the A100 is 10K!!
>
> Best Regards,
>
> Josue Arias.
>
> PS: I always record my synths including the A-100 thru tube DIs just
> for  wearm the signal. I can recomend everybody the
> excellent "possessed" DI/preamp by HCL ( http://www.papa-
> movie.com/html/hand_crafted.html )
> It eats avalons and such crap for dinner!
>
>
>
>
> --- In Doepfer_a100@yahoogroups.com, <hardware@...> wrote:
> >
> > The main problem is in this case not the impedance but the audio
> level.
> > Output levels of electric guitars, basses or microphones are in the
> mV range
> > (i.e. 1/1000 V) and the impedance is in the MOhm range. The levels
> of the
> > A-100 are in the Volt range and the A-100 modules have low
> impedance outputs
> > (typ 10k or even less, that's only 1/100 of the MOhm you
> mentioned). I don't
> > think that a DI box is necessary.
> >
> > Best wishes
> > Dieter Doepfer
> >
> > > -----Ursprüngliche Nachricht-----
> > > Von: Doepfer_a100@yahoogroups.com
> > > [mailto:Doepfer_a100@yahoogroups.com]Im Auftrag von bouyakaboy
> > > Gesendet: Freitag, 7. Juli 2006 13:57
> > > An: Doepfer_a100@yahoogroups.com
> > > Betreff: [Doepfer_a100] Re: output impedance of a patch and DI ???
> > >
> > >
> > > The problem is not the cable length but the impedance matching !
> > > Have you ever try to plug a bass or a guitar directly into
> a "line in"
> > > soundcard or a mixing console ??? The song is awful because the
> output
> > > impedance of these intruments is very hight (Mega Ohm) ! Even
> with a 2
> > > or 3 meter cable length ! And it drops lot of frequencys :-(
> > > But with a DI witch low down the impedance the sound become
> cleaner
> > > and beautiful.
> > >
> > > So, the output impedance of a A-100 VCA or mixer seem's to be
> 10Kohm,
> > > and it's pretty hight. I Think so that low down it with a DI can
> > > improve the sound quality of a A-100 patch. That is the question !
> > >
> > > Best regards
> > > Julien.
> > >
> > >
> > > --- In Doepfer_a100@yahoogroups.com, Florian Anwander
> > > <Florian.Anwander@> wrote:
> > > >
> > > > Hi
> > > >
> > > > > Nobody try to record is A-100 with a sound card and use DI ???
> > > > Nobody answered, because nobody had the idea to do so. ;-)
> > > >
> > > > A DI-Box is not necessary (but of course not wrong) for line
> outs of
> > > > usual synths as long as the connection between the synth and
> the input
> > > > of the mixing desk or the soundcard is short enough (not longer
> than 2
> > > > or 3 meters), and if the input is a line input too.
> > > >
> > > > You only should use a DI-Box if the cable length is longer, and
> the
> > > > input is a balanced (Mic-)input.
> > > >
> > > > Florian
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>