Moog Theremin Etherwave® Plus - Field Upgrade List Price: $179.00 NoiseBug Price : $145.00 Manufacturer Description: Have you heard about the new Etherwave Plus but already own an Etherwave Standard? If so, no problem. Moog is making this great addition to the Etherwave available for existing Etherwave theremin owners. The Field Upgrade's results will be your Etherwave with the addition of all the great 'plus' features: Pitch Preview, Headphone volume knob, separate headphone or pitch preview output, on/off switch with LED indicator, two Control Voltage outputs and one gate output. The Field Upgrade will ship with the following: The Etherwave Plus printed circuit board, a new front panel, headphone volume pot, headphone volume knob, headphone jack, on/off switch, LED indicator, and a template for drilling the bottom of your Etherwave Standard. Once received instructions for installing the components and soldering (7 solder joints) the board will be included. Have fun and good luck!