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Distortion Pedals w/ Treble & Bass boost: Pre, mid, or post distortion?
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Old 5th February 2013   #1
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Distortion Pedals w/ Treble & Bass boost: Pre, mid, or post distortion?

I haven't had luck pulling up schematics on pedals that have treble and bass adjustments to know if it happens pre or post distrotion circuit.

I imagine if it happens pre, you can get more or less distrotion on the highs or lows. If it happens at the distoriton circuit itself I'd assume the signal is split in order to have differnet distortion circuits affecting different frequencies. Post wouldn't be too special, just changing it before you dial it back down to a safe level for input to amplifier/next pedal.

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Old 6th February 2013   #2
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Here's a schematic I found on diystompboxes.com. Not sure what's going on exactly but I'm thinking perhaps the "Tone" section at the end is their EQ, which implies that it occurs after the distortion is put in.

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Old 6th February 2013   #3
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I don't know, but I have a Digitech Bad Monkey and the drive increases when you boost the bass - makes it more ballsy - great feature!

PS - I always wanted a pedal with graphic EQ pre and post the gain knob. Would be rather large though!
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Old 6th February 2013   #4
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I'm fantasizing about something a bit different...
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Old 6th February 2013   #5
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Talking of split band dist, have you tried the Source Audio Multiwave?

Insanely great pedal.
Pete Thorn hss a great YouTube demo.
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Old 6th February 2013   #6
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It's probably dependent on the pedal, though I would think most would have the adjustable tone section after the distortion circuit. After all, doing it before wouldn't prove much advantage over using your guitar's tone knobs, and the clipping will generally create harmonics that may or may not be useful, so a filter is usually put in afterward to help smooth out some of the harshness.

Some will have a hard wired EQ section. Something like a bass or treble cut before the clipping starts. I think the Tube Screamer has a HPF to cut the bass before it hits the first gain stage and then the normal tone stack after it. I'm not sure though. It's been a while since I've seen that schematic. Some pedals have more than one clipping section, so that would give you the opportunity to place an EQ in the middle. I think the Big Muff has multiple clipping stages, IIRC, but I think the tone section lies after both stages.
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Old 12th February 2013   #7
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Have a look at the Radial Tonebone Hot British distortion pedal it has a lot of mid voicing, and contour controls, as well as hi and lo adjustments. A lot of options, I love it

http://www.tonebone.com/tb-hotbritish-using.htm

Tonebone Hot British tube distortion - introduction
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Old 13th February 2013   #8
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Generally, EQ controls come after any clipping/gain stages, and are usually placed just before the output of the circuit.

input - (buffer) - clipping/gain - tone filters - output

These are of course generalities and anything is possible. If you would like to talk about a custom build hit me up. It's what I do!
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