TC Electronic Used Sub N Up Octave - UsedThis TC Electronic Used Sub N Up Octave is in excellent condition and comes with the original box. The feet were removed but are in the box. The Sub n Up from TC Electronic tracks the original input signal and processes one and two octaves down, and one octave up all parallel blendable with or without dry signal output. Track monophonically in the Classic mode, or polyphonically in the Poly mode.