A.The DS-1 delivers the original BOSS distortion sound.
The DS-2 provides a TURBO knob that lets you switch between two turbo modes. Turbo I delivers the original BOSS distortion sound (like the DS-1), while Turbo II applies a unique filter to create a biting sound with a dramatically emphasized midrange boost.
If desired, you can connect a foot switch (sold separately) and use it to switch between Turbo I and Turbo II modes.
(2006/03/27)