Behringer - DM100 Distortion Modeler

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nilsomat
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Post by nilsomat »

Greetings to everybody, i am kind of new to this forum, but have been reading a lot already - good stuff!
I recently got the Behringer DM100 "Distortion modeler", i would really like to know more about the circuit, probably to mod a bit. Has anyone done any reverse engineering or tracing for this particular pedal? If not, i could provide some good photos and start tracing a bit, everyone else would be welcome to help :D
Greetings,
Nils

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darthoverdrive
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Post by darthoverdrive »

I think I have one of these among some of the Behringer pedals I bought when they first came out. I took some of them apart and low and behold, all SMD. I haven't tried tracing any of them out yet.

From what I remember this one is three pedals in one, a Rat a Distortion+ and Boss DS1. I did compare a DS1 and the DM100 side by side and they were Very close in sound. Not surprising though with their track record on products. :)

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JiM
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Post by JiM »

nilsomat wrote:If not, i could provide some good photos and start tracing a bit, everyone else would be welcome to help :D
Please do !
I only give negative feedback.

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nilsomat
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Post by nilsomat »

Will try to take some pics later today...

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nilsomat
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Post by nilsomat »

Ok, there you go:

Front:
Image

Back:
Image

Transistors:
846: K1RY3
113: GS G (?)

Will start tracing a bit today, the diode sections will be first, any ideas what else? I am not going to trace the entire circuit, as i am not crazy...
Greetings,
Nils

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JiM
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Post by JiM »

:thumbsup
nilsomat wrote: Transistors:
846: K1RY3
113: GS G (?)
The BC846 is used as a general purpose gain device in many Behringer products.
The J113 is a JFET often used as a switch for bypass.
I only give negative feedback.

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jamforthelamb
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Post by jamforthelamb »

I have this exact same pedal and was hoping to at the very least rehouse it, and make it true bypass. Mine doesn't bypass cleanly, so even when it's in bypass mode the signal is distorted just a smidge. Watching this post, and willing to use mine as a guinea pig (will start a new thread with specific questions if needed)

Thanks!
-Kevin

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nilsomat
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Post by nilsomat »

So these are the first bits of my tracing....

Image


@Kevin: Welcome aboard! Its cool to talk about true bypass here also, as there are no other threads about this machine. Would be cool to find out as much as possible about this pedal.
Attachments
DM100.pdf
Behringer DM100 schematic
(58.97 KiB) Downloaded 241 times

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jamforthelamb
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Post by jamforthelamb »

Awesome Thanks! Looking forward to it. I'm not real "learned" in all the ways of circuitry, but I've built MANY effects and other things thanks to the knowledge base online, so I likely won't be much help in figuring out how the circuit works, but I'll be glad to lend an iron toward trying stuff. This pedal was given to me by a neighbor, so I have no cost in it thus far :D

-Kevin

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