Here’s some basic information and how to build an “Amp-less” version (supply your own amp). Contact us if you have questions.
Here’s a schematic for the Heil Sound “The Talk Box”.
Here’s a link to some great talkbox information: Talkbox FAQ Page
This is a picture of a couple of good drivers for talkboxes. The driver on the left is an old Kustom driver that I’ve been using for years. On the right is the MCM driver that John recommends.