Doepfer

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
> >
> >
> >
> >
> >
> >
>