"You can be assured of at least 750 hours of battery life with this 6- 'C' cell unit"

Here’s an ad for yet another refugee on the junk heap of ’70s outboard guitar gear, the Acoustyx Phase Five. It’s a little hard to tell exactly what the “exciting electronic accessory” did aside from making a 6-string sound like a 12-string, as touted. The ad also cites the Acoustyx IS-1 synthesizer (introductory offer $199.50). It’s difficult to find much of anything about either on the web.

Scanned from Guitar Player, June 1978.