B-52 Professional Guitar ST-Series

ST-100A I ST-60A I ST-6012 I ST-412V & ST-412S I ST-212S
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ST-60A: 60-watt all-tube amplifier with tri-mode rectifier

The ST-60A has a 100% all-tube signal path that combines Sovtek 6L6 power tubes with 12AX7 preamp tubes for solid tube tone and classic breakup. Capable of monstrous gain, extreme distortion, and sparkling clean tones through 2 channels. The Clean and Overdrive channels have their own sets of volume and EQ controls (3-band bass, mid, and treble), with 2 Gain knobs and an interactive Contour control (Gain 2) on the Overdrive channel.

You can further shape your tone by selecting 3 rectifier settings. The solid-state setting delivers the tightest low-end definition and fastest attack. Tube A gives you a vintage attack and feel with the warmest sound. Tube AB1 is in-between the first two: punchy, warm sound with more definition than Tube A. Roadworthy 13-ply Baltic birch construction protects that circuit path from damage so you get reliable performance.

ST-100A features and specifications

• All-Tube signal path
• Overdrive Channel: Gain 1,
Gain 2 with contour, 3-band EQ
and level control
• Clean Channel: Level control and 3-band EQ
• Rectifier Select: Tube - Class A or AB,
Solid-state - Class AB
• Effects send and return with level controls
• Pushswitch for channel and gain select
• Master volume
• Spring reverb

• Headphones line out
• Porcelain tube sockets for
increased reliability
• Line out with level control
• Selectable 4/8/16 ohms external
speaker jacks
• Ground lift switch
• Rugged foot switch for channel select,
reverb on/off and gain select
• Rugged 3/4” Baltic birch construction
• Dimensions: 27" x 11" x 11"
• Weight: 51 lbs
The ST-60A features rock-solid 13-ply Baltic birch construction
ST-60A Tube Chart
2 – 6L6 / 5881
5 – 12AX7
1 – 12AT7
1 – 5AR4

B-52 Professional, 3383 Gage Ave, Huntington Park, CA, 90255 I Toll Free (US): 800-344-4384 I Ph: 323-277-4100 Fax: 323-277-4108
Copyright © 2007: ETI Sound Systems, INC