GuitarFetish Onboard Multi-Distortion Circuit

[minions]

I was looking on GuitarFetish out of curiosity and I came across a pre-amp booster called the Onboard Multi-Distortion Circuit. I was wondering if anyone has had any experience with it, or any GuitarFetish pre-amp booster, and if it does what it says it does (i.e. has 4 distortion sounds including AC-30, Overdrive Twin, Marshall Lead, and Mega Overdrive). Also, would something like this be digital?

store.guitarfetish.com/onmucihotrot.html

Thanks.

[ashcatlt]

I thought newey said he had one or other of their boosters. I'd love to know how this sounds. It's just so fricking cheap! I've been thinking about trying to build a multichannel amp simulator, and this might be an extremely easy way to accomplish it...

I'm pretty sure it's all analog. There's some pretty tried and true circuits out there for emulating amplifiers.

[newey]

I have 2 of these, but have yet to wire either one into any guitar. They're sitting in my parts box at the moment. So no report to give as yet.

This one is apparently a newer model. One of mine is a simple onboard boost, without a pot, while the other is a tube emulator, which is a "PCB on a pot" design.

I believe both of mine are analog. No chip on the board anywhere I can see.

One of these days, when the right project comes along, they'll get used . . .

[minions]

Oct 27, 2009 2:50:36 GMT -5 ashcatlt said:

There's some pretty tried and true circuits out there for emulating amplifiers.

Do you have any examples of those? Thanks.

[JohnH]

Oct 27, 2009 11:39:32 GMT -5 minions said:

Oct 27, 2009 2:50:36 GMT -5 ashcatlt said:

There's some pretty tried and true circuits out there for emulating amplifiers.

Do you have any examples of those? Thanks.

I like this site:
www.runoffgroove.com/

They try to replicate various amps and tube circuits using field effect transistors. I built the 'Fetzer valve' into a guitar as a nice warm booster stage. Ive also built several stompboxes on similar principles, though not to their actual designs.

JFETs are ideal as preamp stages because they respond to gain and overdrive is quite a valve-like way - they can also be designed to run on low current. Three or four stages can be arranged to draw less than 0.5mA, so batterys last very well.

John

[newey]

JohnH-

Good link, duly added to the Links page under "Effects".

+1 for a "finder's fee"!