Shure A15PRS Switchable Phase Reverser vermona If you have the 14

If you have the 14 pin DCB connector

ZBox matches the output impedance (”Z”) of your guitar to the impedance of a non-amp input

All the tones of the original Sparkle Drive

If no signal is connected to the first socket the attenuator works as a (fine) tuning knob because a voltage in the range 0

Over and above this

Shure A15PRS Switchable Phase Reverser vermona If you have the 14The Shure A15PRS reverses the phase (polarity) of a balanced audio signal. Typical use applications include correcting polarity reversal caused by a wiring error in a microphone cable; connecting an unbalanced high impedance microphone having the "hot" signal on pin 3 to the input of a mixer that requires the "hot" signal on pin 2; and reducing phase cancellation comb filtering between two signals that are of opposite polarity. An in line switch