Re: SD-1 vs. OD-3
The SD-1 is the classic Boss overdrive. Sort of like a Tubescreamer with a bit more crunch. It has pushed mids and a bit of bass roll-off. It is an OVERDRIVE not a distortion pedal. It has more than enough gain for me, but metal players may want more saturation if going through a clean amp.
The OD-3 is Boss's attempt to create an overdrive that doesn't lose low end, yet isn't a "metal" pedal.
I say it succeeds. What bothered me about it (through my rig) is that it pushes TOO much bass. You kick it on and it's like "wooooaaaaah". And you can't dial it out. You can boost the tone control, but that just brightens it, so in a way it becomes a "scooped sound", but not in a thrash metal way. More like a crankin' Marshall way.
Listen to the opening chords of "Makin Love" by Kiss. That's the tone.
The OD-3 I think is more similar to a modded DS-1 than to the SD-1.
I personally prefer the SD-1 because it f*cks with my sound less. It is much more transparent.
I sold the OD-3, still have the SD-1, but don't really use it as I go with true bypass stuff mostly these days. The Fulldrive 2 and Sparkle Drive are on my board right now.....
Peace.
