Check the listing for details. CopperSound Pedals Polaris Chorus/Vibrato Effects Pedal. Condition: New. Listed at 249.00 USD. The CopperSound Polaris is a chorus/vibrato inspired by the original EHX Small Clone. With its smooth modulation and simple controls, it was a great starting point. At the heart of Polaris resides an MN3007 BBD chip, the same one found in the original NYC box. After recreating the circuit in a breadboard, CopperSound designers moved forward from there. They started by replacing the depth switch in favor of a knob. This allows for better control of the modulation depth. Following in the steps of Daedalus, they incorporated a second depth knob that is selectable via the secondary footswitch. The original circuit did not have any tone control options. They decided to implement a Tone knob on Polaris. This knob allows the user to add or cut lower bass presence to the signal.