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Mailist to discuss all issues regarding the Digitech GSP-2101 Guitar FX Processor

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the "dual preamp" 2101 connection method

the "dual preamp" 2101 connection method

2002-07-05 by sbaalgmc

I posted this question a while back w/ no responses, so I thought I'd 
try again.

The 2101 manual (v3.0 software) describes a setup where you use both 
the 2101 preamp and the guitar amp preamp (i.e., my Marshall) but 
using a "y cord" and the FX Loop Sum, No Sum, and Bypass modes so 
that you always have the digital effects in the effects loop of the 
guitar amp, but you can select which preamp is being used (the 2101 
or the amp's).

I have had little luck with the setup.  Doing it exactly like the 
manual says does give very good results.  The preamps are never 
separated and always seem to run simultaneously, regardless of 
settings (although which is most prevalent DOES changes depending on 
the FX loop control).

What I'm looking to do in keep the digital effects in the effects 
loop of the marshall, but be able to select the 2101 preamp when I 
want it and keep it out of the way when I don't.  As with most front 
end "boxes," the 2101 seems to greatly reduce the effect the guitar 
volume has on the tone of the amp (that is, you can't really go from 
clean to crunch on the amp using the guitar's volume with the 2101 
preamp on the front end).

Anybody ever successfully conquered this setup?  I'd love to hear 
from ya.  

BTW, I run an '82 American Strat w/ EMGs (Gilmour set) and an Epi Les 
Paul (w/ Duncans) into the 2101 (v3.0) then into a Marshall DSL201 
(20watt 1x12 combo, channel switching, single input [hence the y 
adapter needed for the manual's set up]).  The DSL201 is great 
because you can drive the power tubes (2xEL84) to max without killing 
all carbon-based life forms within a 2 mile radius.

Greg
USA

Re: [gsp-2101] the "dual preamp" 2101 connection method

2002-07-06 by klaus dibbelt


I have had little luck with the setup. Doing it exactly like the
manual says does give very good results. The preamps are never
separated and always seem to run simultaneously, regardless of
settings (although which is most prevalent DOES changes depending on
the FX loop control).
just an idea: some algorithms have stereo, some have mono inputs. when you use a stereo algorithm, but have connected only one return, you´ll get both preamps at the same time. you could try to connect both returns via a split cable and look (no, hear!), what´s happening with mono and stereo algorithms (if you haven´t done that already).
best regards
klaus


Re: [gsp-2101] the "dual preamp" 2101 connection method

2002-07-06 by "Pedro Miguel Viana Ferreira"

I have already started a forum on this on the digitech site, I 
have copied it to this mail. Hoppe it can be useful.

This is very simple. You probably have a head amp or a combo 
wich has it's own pre. What you have to do is connect you 
effect send to a Y cable tha will split the signal in 2 equal 
signals and connect one to (say) the left return of the 2101 
and the other do the input of your combo or head amp. Then 
connect the amp's effect loop send to the other return of the 
2101, in this case the right one. Then you plug you output of 
the digitech to the effect loop return of your amp and voila 
you have 2 pre totaly independent that you can mix using 
algoritms that can do that (mail me if you want some diagrams 
on algoritms that use dual pre) and you can also control de 
master volume whith the output level control of the 2101. It 
sound great if you have good power amp (valves are the thing) 
and a good pre (valves are the thing). Hoppe it can be useful.

Remember that the 2101's loop leaks so you are alway gona hear 
a bit of 2101's pre.
I have just bought a ppc-210 and artist software from Dieter 
Waechter and I'm waiting to start some serious argoritms to 
make the 2101 work just like the 2120.

One advice:

 - Use the 2101 stereo noise gate to gate the clean sound, and 
add another one to the algoritm to gate the distorced sound.

Any thing just say

Pedro Ferreira

--------------------------------------------
Webmail da rede SAPO - http://webmail.sapo.pt/

Re: the "dual preamp" 2101 connection method

2002-07-06 by sbaalgmc

thanks for the input, I'll give this configuration a try.  but it 
seems that this one always has the full output of the 2101 going into 
the effects return of combo amp, and the full preamp of the combo amp 
going into the 2101.  It seems that through algorithm programming you 
could control which preamp governs, but I was hoping for more of the 
flexibility shown in the set up described in the manual that allows 
both preamps to be present in all algorithms, controlled by whether 
the FX Loop is set to Sum, No Sum or Bypass.  The problem with the 
set up on the manual is that you don't seem to ever be able to shut 
off the combo amp's preamp (i.e, the 2101 preamp, even when it should 
be primary, is alway "lurking" behind the combo's preamp).

Perhaps its the shortcoming of using a "y" connector instead of 
having dual inputs on the combo amp.

Any other users have luck with this setup?

Greg



--- In gsp-2101@y..., "\"Pedro Miguel Viana Ferreira\"" 
<pedro_mig_ferreira@n...> wrote:
Show quoted textHide quoted text
> I have already started a forum on this on the digitech site, I 
> have copied it to this mail. Hoppe it can be useful.
> 
> This is very simple. You probably have a head amp or a combo 
> wich has it's own pre. What you have to do is connect you 
> effect send to a Y cable tha will split the signal in 2 equal 
> signals and connect one to (say) the left return of the 2101 
> and the other do the input of your combo or head amp. Then 
> connect the amp's effect loop send to the other return of the 
> 2101, in this case the right one. Then you plug you output of 
> the digitech to the effect loop return of your amp and voila 
> you have 2 pre totaly independent that you can mix using 
> algoritms that can do that (mail me if you want some diagrams 
> on algoritms that use dual pre) and you can also control de 
> master volume whith the output level control of the 2101. It 
> sound great if you have good power amp (valves are the thing) 
> and a good pre (valves are the thing). Hoppe it can be useful.
> 
> Remember that the 2101's loop leaks so you are alway gona hear 
> a bit of 2101's pre.
> I have just bought a ppc-210 and artist software from Dieter 
> Waechter and I'm waiting to start some serious argoritms to 
> make the 2101 work just like the 2120.
> 
> One advice:
> 
>  - Use the 2101 stereo noise gate to gate the clean sound, and 
> add another one to the algoritm to gate the distorced sound.
> 
> Any thing just say
> 
> Pedro Ferreira
> 
> --------------------------------------------
> Webmail da rede SAPO - http://webmail.sapo.pt/

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