The V264 Vox Delta IV Bass was offered in the 1967 "Vox, It's Whats Happening" and the 1968 "The Sound That Travels With the Stars" catalogs. A reprint of either of these catalogs is available at North Coast Music. In addition to dual single coil pickups, this solid body "Phantom" shaped bass guitar featured an onboard battery operated distortion (fuzz tone) circuit, a treble/bass booster, and a G-tuner.
The 1967 US Vox catalog described the Delta IV Bass as follows:
"A tremendous new four string bass guitar! The Delta IV is a four string with the famous solid body Phantom shape. Has built-in G tuner, distortion booster, treble and bass boosters. Has an all new fast and easy to fret neck, with Vox double T-bar and adjustable truss rod. Has two exclusive VOX Ferro-Sonic wide range pickups. Has one volume, two tone controls. Jumbo chrome plated machine heads."
The 1968 US Vox price list indicated that the retail price of the Delta IV Bass was $360 USD. Adjusting the 1968 price for inflation, the Delta IV bass would retail for nearly $2500 today.
The Delta IV Bass was produced for Vox in Italy by Eko. A decal on the back of the head stock states: "Made by Vox in Italy."
The circuitry for all the onboard effects in the Delta IV was designed into a single module. Often this module was sealed and encapsulated, making it not repairable or replaceable. Additionally, the Vox wiring diagram for this bass includes no specific or discrete electronic repair information for these modules. If you find that changing the 9 volt battery that powers the internal effects does not correct a malfunctioning effects circuit, you probably should consider the onboard features permanently inoperative. Replacement modules have not been available for over twenty years.
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