More bass, no more huge mid hump, better gain, has TS style clipping, pretty sweet. I just prefer my stock SD-1.
Right from the Monte allums website-
Boss SD-1 GT DIY Pedal Mod Kits - This is my third mod for a Boss SD-1. This mod is built around a 2N3440 Transistor. A 2N3440 Transistor in this circuit, along with a few other tweaks here and there, transforms this pedal into an absolute tone monster! This mod combines the positive qualities of my first two SD-1 Mods to create an unbelievably great overdrive. The SD-808 is one of my personal favorites. Some say it's the best SD-1 mod available. The SD-1 GT is more transparent than either of my other two SD-1 Mods. It has a very slight mid boost which helps you stand out in a mix. But the real magic happens in the upper frequencies. If you've ever played a vintage Script Dyna Comp or Ross compressor you've experienced the magic that happens in the upper range of those pedal and give them the magic that pro players rave about. That same magic is present in my SD-1 GT Mod. Note clarity is the best of any pedal mod I sell to date. My RAT 2 Fat Rat Mod comes very close but the GT has a tad better note clarity. Think early Led Zepplin Tone here.
I've also incorporated two switches into the SD-1 GT Mod. One switch adds presence and gain while the other switch toggles between Asymmetrical (Boss) and Symmetrical (Ibanez) Clipping. There are a ton of tonal options available here. Want clean boost. No problem. Want note articulation and clarity. No problem. Want smooth creamy overdrive. No problem. Want a combination of them all. You got it. Very versatile Mod that offers a wide pallet of tonal colors. To add a little icing on the cake I am including the extremely popular and quiet OPA2134PA Burr Brown op-amp. So, you thought the SD-808 was a great mod? Wait till you hear the GT!
$60 OBO!
Right from the Monte allums website-
Boss SD-1 GT DIY Pedal Mod Kits - This is my third mod for a Boss SD-1. This mod is built around a 2N3440 Transistor. A 2N3440 Transistor in this circuit, along with a few other tweaks here and there, transforms this pedal into an absolute tone monster! This mod combines the positive qualities of my first two SD-1 Mods to create an unbelievably great overdrive. The SD-808 is one of my personal favorites. Some say it's the best SD-1 mod available. The SD-1 GT is more transparent than either of my other two SD-1 Mods. It has a very slight mid boost which helps you stand out in a mix. But the real magic happens in the upper frequencies. If you've ever played a vintage Script Dyna Comp or Ross compressor you've experienced the magic that happens in the upper range of those pedal and give them the magic that pro players rave about. That same magic is present in my SD-1 GT Mod. Note clarity is the best of any pedal mod I sell to date. My RAT 2 Fat Rat Mod comes very close but the GT has a tad better note clarity. Think early Led Zepplin Tone here.
I've also incorporated two switches into the SD-1 GT Mod. One switch adds presence and gain while the other switch toggles between Asymmetrical (Boss) and Symmetrical (Ibanez) Clipping. There are a ton of tonal options available here. Want clean boost. No problem. Want note articulation and clarity. No problem. Want smooth creamy overdrive. No problem. Want a combination of them all. You got it. Very versatile Mod that offers a wide pallet of tonal colors. To add a little icing on the cake I am including the extremely popular and quiet OPA2134PA Burr Brown op-amp. So, you thought the SD-808 was a great mod? Wait till you hear the GT!
$60 OBO!
