The V271 Vox Apollo 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. This semi acoustic, single pickup bass guitar featured a single florentine (pointed) cutaway and a number of onboard battery operated special effects.
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The 1968 US Vox catalog described the Apollo IV Bass as follows:
"A exciting all new 4-string Florentine cutaway electric acoustic bass. Has built-in G tuner, distortion booster, treble and bass booster. All new easy-to-fret fast-neck featuring Vox double T-bar and adjustable steel rod. Exclusive VOX Ferro-Sonic pickup. Fully adjustable bridge. One volume and one tone control. Chrome plated machine heads. Sunburst or Cherry."
The 1968 US Vox price list indicated that the retail price of the Apollo IV Bass was $295 USD. In 2011 dollars, the Apollo IV Bass would retail for about $1899.
The Apollo IV Bass was produced for Vox in Italy by Eko. A decal on the back of the head stock states: "Made for Vox in Italy."
The circuitry for all the onboard effects in the Apollo 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 guitar includes no 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 should consider the onboard features permanently inoperative. Replacement modules have not been available for over twenty years.