This is a vintage 1970 Ampeg SVT Blue Line bass guitar amplifier head. This particular example, serial number 100672, is in very good all original condition. This iconic bass amp remains unparalleled by all other vintage high-power bass rigs, has been reissued by Ampeg to the tune of $2,000.00+, and has achieved ultimate acclaim for virtually all bass amplification applications. In short, when it comes to bass, this is the amp.
Serial Number: 100672
Transformer Codes: 298601, 682053, 6 048
Capacitor Date: 12-69
The Ampeg SVT utilizes; (6) 6550 (though the first generation schematic reflects the potential fo 6146 power tubes), (4) 12WD7, (2) 12BH7, (1) 12AX7, and (1) 6C4, all of which are original tubes.
In 1969, Ampeg’s Chief Engineer Bill Hughes designed the Super Valve Technology circuitry for the amplifier which adapted that acronym. 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 particularly early example is in perfectly intact original condition. The sextet of 6550 power tubes appears to be original, as are the pre-amp tubes. 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.