Type
Tube Bass Amplifier Head
Model
SVT “Black Line”
Manufacturer
Ampeg
Country of Manufacture
USA
Controls
Volume, Bass, Midrange (with selectable frequency switch), Treble, Ultra Hi/Ultra Lo switches, Bright switch, Master volume (on later revisions)
Input
Two instrument inputs (Normal and Bright channels)
Output
¼" speaker outputs, 4Ω and 2Ω operation
Power Supply
AC mains
Notable Features
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Delivers 300 watts RMS via six 6550 power tubes and a robust all-tube preamp/driver section
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Known as the “Black Line” due to black silk-screened front panel lettering, distinguishing it from earlier “Blue Line” versions
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Dual-channel design (Normal and Bright) for tonal variety
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Legendary for massive headroom, deep low end, and aggressive growl at high volume
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Extremely heavy and rugged, built for professional touring use in the 1970s