Description
Keeley Electronics’ Boss DS-1 SEM was designed to correct the original’s shortcomings both in tone and distortion quality.
The intention of the DS-1 SEM was to not only increase the amount of gain available, but also make it usable, smoother gain through careful tuning of the tone control network. Beyond tuning the DS-1 SEM for better tone through new values of parts, many of the original unit’s parts were discarded and substituted for premium components such as tantalum capacitors.
To increase initial gain, Keeley incorporated a unique diode in the circuit, which doubles as the “Seeing Eye”.
As notes or chords are played, the light-emitting-diode flashes and pulses with equivalent intensity as your guitar signal.
