Tech 21 GED 2112 Sansamp Demo + Thoughts

[DigitalMan]

I thought I remembered seeing that mod posted somewhere but now it seems Tech 21 is saying it needs to be done be a qualified tech or it voids the warranty? Just to move a toggle?

Dunno why they put it in the manual then. Maybe the advice they gave was early on, or maybe they just were responding conservatively based on their perceived technical aptitude of whom they were communicating with. I’ve had them tell me to do far more risky things first if I felt up to the task.

 

[husky123]

Dunno why they put it in the manual then. Maybe the advice they gave was early on, or maybe they just were responding conservatively based on their perceived technical aptitude of whom they were communicating with. I’ve had them tell me to do far more risky things first if I felt up to the task.

Yeah, I think you’re right. If/when i get it, that’s the first thing I’m doing.

 

[coys1123]

Dunno why they put it in the manual then. Maybe the advice they gave was early on, or maybe they just were responding conservatively based on their perceived technical aptitude of whom they were communicating with. I’ve had them tell me to do far more risky things first if I felt up to the task.

Can you explain how this is done or direct me towards one of their other product manuals where this is explained? I am considering getting this unit and googled the manual but i didn't see any info regarding moving the jumper yourself.

Thank You.

 

[BassoSaku]

Very nice playing and tone.

Some things that I can't get an answer to (from the product pages on Sansamp's website) are: what do the dual inputs on the back do? Are they both active together?

I also see that there is a blend control on the drive section....is this blending the two channels together or the dry signal into the effected signal?

The dual inputs are for 2 basses (as Geddy uses live. one tuned in E and one tuned down to D) They can not be activated together. It is either A or B.

Blend is for the amount of DRIVE channel in the output.

There are also 2 sets of outputs for DRIVE and DEEP. Regular 1/4" plug and XLR.

Here is how I have it set up:



Two different basses go to Dual Wireless AKG -> GED2112 A and B inputs -> Morley A+B -> MarkbassF1 -> Cabinet.

HTH

 

[lifeson70]

Can you explain how this is done or direct me towards one of their other product manuals where this is explained? I am considering getting this unit and googled the manual but i didn't see any info regarding moving the jumper yourself.

Thank You.

I would like to know how to do this too. Did you ever find out how? Thanks

 

[lifeson70]

That is true. Whatever the active input happens to be, it feeds both preamp sections.

You can also easily move a jumper to have the outputs be summed instead of independent. It doesn’t have to be done by a qualified tech. The manual shows exactly how to do this.

Could you please show how to do this? I couldn’t find it on the online manual.
Thank you.

 

[DigitalMan]

Could you please show how to do this? I couldn’t find it on the online manual.
Thank you.

There is a jumper labeled “tie”. Unscrew the bottom panel and move the jumper to the other position. It’s a typical three-pin configuration where the jumper either spans pins 1/2 or 2/3.

 

[lifeson70]

There is a jumper labeled “tie”. Unscrew the bottom panel and move the jumper to the other position. It’s a typical three-pin configuration where the jumper either spans pins 1/2 or 2/3.

Thank you!

 

[John Swartz]

I use the easier way to blend the two channels: run a short cable from the Deep section’s 1/4” Output, set for 0dB (button pushed in) to the Effect Return with the 50/50 mix engaged (button pushed in). Then run from the Drive section’s 1/4” Output to your amp, and/or the Drive XLR Out to the PA. Start with both Level controls at 12:00. The Drive Level will now serve as a “master volume”, and the Deep Level will allow you to “blend in” the clean signal.

I just got one of these units and gigged with it for the first time this past weekend and it worked great. I ran the Drive and Deep into separate channels driving separate cabs and the thing is a tone monster!

John

 

[husky123]

I use the easier way to blend the two channels: run a short cable from the Deep section’s 1/4” Output, set for 0dB (button pushed in) to the Effect Return with the 50/50 mix engaged (button pushed in). Then run from the Drive section’s 1/4” Output to your amp, and/or the Drive XLR Out to the PA. Start with both Level controls at 12:00. The Drive Level will now serve as a “master volume”, and the Deep Level will allow you to “blend in” the clean signal.

I just got one of these units and gigged with it for the first time this past weekend and it worked great. I ran the Drive and Deep into separate channels driving separate cabs and the thing is a tone monster!

John

That’s easier than going in, switching the jumper one time and being done with it forever, plugging in normally and having the controls labeled on the amp do what they’re labeled to do?

 

[husky123]

There is a jumper labeled “tie”. Unscrew the bottom panel and move the jumper to the other position. It’s a typical three-pin configuration where the jumper either spans pins 1/2 or 2/3.

Thanks for the info. Is the pic you posted the before or after? Reason I ask is because I may be getting a used one. Is it just the one jumper I’ve attached in this pic?

 

[DigitalMan]

Thanks for the info. Is the pic you posted the before or after? Reason I ask is because I may be getting a used one. Is it just the one jumper I’ve attached in this pic?

The pic shows “before”. If you number the pins 1/2/3 based on the orientation of the text, then in this pic 1/2 are jumpered together. Note that the word “tie” is shifted to the right and leans toward the 2/3 pins. Tie is the mode that ties the two outputs together.

It is just the one jumper.

 

[husky123]

The pic shows “before”. If you number the pins 1/2/3 based on the orientation of the text, then in this pic 1/2 are jumpered together. Note that the word “tie” is shifted to the right and leans toward the 2/3 pins. Tie is the mode that ties the two outputs together.

It is just the one jumper.

Gotcha, thanks a ton.

 

[husky123]

Another question, when you do the jumper mod to combine outputs, what output do you use on the back of the preamp?

Edit: I think/hope I found the answer that both of them put out the same combined signal.

 

[John Swartz]

That’s easier than going in, switching the jumper one time and being done with it forever, plugging in normally and having the controls labeled on the amp do what they’re labeled to do?

If you always plan on running both channels blended, maybe not. My main rig is 2 cabinets powered by a dual-channel power amp -- so my "typical" set-up is to run the "Drive" channel through one channel to one cabinet, and the "Deep" channel through the other channel to the other cabinet. The only time I'd likely blend is if I'm only bringing one cab. Granted, if I'm sending signals to the house PA, not all soundmen want to deal with 2 bass signals...

To each his/her own...

John

 

[johnsonabq]

Another question, when you do the jumper mod to combine outputs, what output do you use on the back of the preamp?

Edit: I think/hope I found the answer that both of them put out the same combined signal.

It was my understanding that the jumper simply converted the mute button to a bypass button. That it did not sum the pres together. You have to use a patch cable from the Deep output to the effects return on the Drive section (with the 50/50 button engaged) in order to get the two pres summed together.

 

[John Swartz]

It was my understanding that the jumper simply converted the mute button to a bypass button. That it did not sum the pres together. You have to use a patch cable from the Deep output to the effects return on the Drive section (with the 50/50 button engaged) in order to get the two pres summed together.

The patch cable method you described worked, but (and this is not in the manual), there apparently a jumper you can change internally which will sum the two preamps together. See other posts for how to do that. I have not done this myself as I use a dual channel power amp typically running each channel to separate cabinets so I don't combine my preamps.

John

 

[husky123]

It was my understanding that the jumper simply converted the mute button to a bypass button. That it did not sum the pres together. You have to use a patch cable from the Deep output to the effects return on the Drive section (with the 50/50 button engaged) in order to get the two pres summed together.

There are two jumpers inside. One does what you’re describing and the other sums both sides into one output

 

[johnsonabq]

There are two jumpers inside. One does what you’re describing and the other sums both sides into one output

Thanks Lee. I don't know why they have to be secretive about this. Those two mods open this unit up to many more buyers.

 

[timhuggins]

Thank god for this thread! I spent half a day googling this dilemma. I intend to run my 2112 (arrives wednesday) through my DB751 (which only has one channel). That jumper-mod info is going to be a lifesaver. Thank you DigitalMan.