This is a vintage 1972 Ampeg SVT ‘Blue Line’ bass guitar amplifier head. This particular example is in very excellent all original condition. This iconic bass amp remains unparalleled by all other vintage high-power bass amps, has been reissued by Ampeg to the tune of $2,000.00+ and has achieved ultimate acclaim for virtually all bass applications. In short, when it comes to bass amplification, THIS. IS. IT. In particularly well-preserved cosmetic condition, while remaining entirely original, this particular example is perfect for players and collectors alike.
Serial Number: n/a
Transformer Codes: 7221, 300712-1, 320829-1
The Ampeg SVT utilizes; (6) 6550 (though the schematic reflects the earlier 6146) power tubes, (4) 12WD7, (2) 12BH7, (1) 12AX7, and (1) 6C4 tubes. While most of the original tubes are included, the amp was recently outfitted with (6) new ARS power tubes.
In 1969, Ampeg’s Chief Engineer Bill Hughes designed the Super Valve Technology circuitry for the amplifier of the same name. At 85 lb (39 kg), the Ampeg SVT provided 300 watts of RMS power, considerably more than most other bass amplifiers of the era. The high power rating made the SVT a candidate for use in larger venues. The SVT saw widespread use by rock acts in the 1970s, yet has since to wane in popularity.
This particular early variety example is in perfectly intact original condition. All transformers and capacitors are original, and the amp has not been modified. The original cabinet is in perfect structural condition, and though there are no significant flaws, the vinyl tolex exterior does display the usual scuffs and snags. The light blue sharp edge graphic is typical of early production control panels, and this example features two original mis-matched “polarity” and “power” toggle switches. Perhaps most importantly, the amp is in perfect functional condition, and it sounds amazing. Clearly intended for an 8×10″ speaker cab configuration, it is also well-suited for a pair of 15″ speakers or a single 4×10″ cab. Incredible for both live and studio use, the SVT remains unparalled over 40 years later.