Mad Professor - Simble Predriver

RiGLEY · Post by **RiGLEY** » 18 Jan 2016, 10:39

Any info on this one?
I like the sound based on the videos. Would love to try one in real life.

http://www.mpamp.com/factory-pedals/simble-predriver/

mictester · Post by **mictester** » 18 Jan 2016, 12:45

It's a single op-amp with a bit of voltage gain and a mid-range hump, peaking at about 500Hz. It'll just give a valve (tube - US) amplifier a bit more of a push. It's like using a Tubescreamer with the gain turned way down.

RiGLEY · Post by **RiGLEY** » 18 Jan 2016, 15:34

Interesting, I thought it is transistor based.
Lets see some guts!

mictester · Post by **mictester** » 20 Jan 2016, 10:22

The one I saw had an op-amp in there.

You can get much the same result with the Electro Harmonix LPB circuit and some sensibly chosen input and output capacitors. That's just one transistor.

Nocentelli · Post by **Nocentelli** » 20 Jan 2016, 19:18

I assumed from the description ("transistor.... ultra high impedance input" etc) it was a MOS-FET/SHO derivative.

Cub · Post by **Cub** » 20 Jan 2016, 20:49

Intriguing, I do like these simple little tone sweeteners and would like to know what's going on inside.

Ichabod_Crane · Post by **Ichabod_Crane** » 31 Mar 2020, 09:54

Bump!
Any clue about the schematic, please?

Renegadrian · Post by **Renegadrian** » 06 Apr 2021, 22:55

after another year...nothing!?

chigalihape · Post by **chigalihape** » 03 Jul 2021, 06:02

Hi everyone,
Still no trace of technical information on this pedal?
I dug and dug on the web, but nothing, no guts, no discussion (except this one!), no schem of course... I think this is the first thing to happen to me!... So if anyone have clue...

Renegadrian · Post by **Renegadrian** » 29 Sep 2021, 15:11

it seems no one has this pedal or cares to know more...so it is a mistery still...

Post by **modman** » 30 Sep 2021, 10:49

mictester wrote: ↑18 Jan 2016, 12:45 It's a single op-amp with a bit of voltage gain and a mid-range hump, peaking at about 500Hz. It'll just give a valve (tube - US) amplifier a bit more of a push. It's like using a Tubescreamer with the gain turned way down.

mictester wrote: ↑20 Jan 2016, 10:22 The one I saw had an op-amp in there.
You can get much the same result with the Electro Harmonix LPB circuit and some sensibly chosen input and output capacitors. That's just one transistor.

chigalihape wrote: ↑03 Jul 2021, 06:02 Hi everyone,
Still no trace of technical information on this pedal?
I dug and dug on the web, but nothing, no guts, no discussion (except this one!), no schem of course... I think this is the first thing to happen to me!... So if anyone have clue...

Renegadrian wrote: ↑06 Apr 2021, 22:55 after another year...nothing!?

Renegadrian wrote: ↑29 Sep 2021, 15:11 it seems no one has this pedal or cares to know more...so it is a mystery still...

Please stop bumping threads years on end - it's not going to make you get what you want. If you're really desperate (waiting years!) to get this particular pedal, buy it (it's only 119 euros), trace it and share the info. That's the basic rationale behind the forum. I you don't have money for that, build the LPB as mictester suggested, and go from there...

Here's another approach: go on facebook, post a picture of this pedal and ask people whether they like this pedal, if it's any good? Then ask the owners of this pedal for gutshots...