A neat Keeley-designed mod for the classic Boss DS-1! This "Ultra" mod includes new asymmetric silicon clipping diodes, an op-amp frequency response modification to even out the harsh edges of the distortion tone, and an improvement to the output buffer that allows it to work better with other pedals. This pedal has been tested and is in proper working order.
Used/New/Vintage: Used
Case: No box
Repairs/Replacement Parts: All original
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