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Hoffman Amplifiers > Other Stuff > Effects (Moderators: Geezer, tubenit, PRR, sluckey) > Boss SD-1...Leveling out mid "hump"??
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Geezer
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Groov'n Tube'n KOOK (Keeper Of Odd Knowledge)
« on: September 27, 2008, 08:55:40 pm »
I have a Boss SD-1 Overdrive (see schem below).....what components would I change to get rid of the huge midrange "hump"/boost that it gives (& I hate)?

TIA

http://www.schematicheaven.com/effects/boss_sd1_super_overdrive.pdf
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Geezer
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Groov'n Tube'n KOOK (Keeper Of Odd Knowledge)
« Reply #1 on: September 28, 2008, 06:26:49 am »
I found these videos on youtube that helped me understand a bit on what I'm looking to achieve>>>






Here's a link to the Simple R-C Filter Cutoff calculator referred to in the videos>>>

http://www.muzique.com/schem/filter.htm


I'm going to try some changes in the R-C filters later today & will post results.....any other suggestions/experiences still appreciated.   Geez'r
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PRR
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« Reply #2 on: September 29, 2008, 11:36:45 pm »
> get rid of the huge midrange "hump"/boost

If you put the bass, and the mid, and the highs, all through the same shredder, they intermodulate each other and more complex sounds come out like crap.

Pulling a couple-octaves out of the middle and shredding that is much less likely to make ugly noises (other than the ugly noise it is supposed to make).

To prove it to yourself (or prove that you can dance around the issue), do the green mods below.

* Boss-SD-1.gif (5.1 KB, 480x232 - viewed 87 times.)
« Last Edit: September 29, 2008, 11:39:07 pm by PRR » Logged
birt
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I love tube amps
« Reply #3 on: September 30, 2008, 05:54:52 pm »
since it is related to the tubescreamer, read this: http://www.geofex.com/Article_Folders/TStech/tsxtech.htm
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