The Silver Sterling Signature 150 Head is Two-Rock's take on the original Sterling, revisited after nearly a decade of work: four 6550s for 150 watts, switchable to 75, a tone stack with high and low cut filters, all-tube spring reverb and a sixth 12AX7 as a cathode follower for punch and headroom.
The FET and the tone stack bypass are both on the footswitch, and the 7-position High and Low filters let you trim the top and the bottom to suit the room and the guitar. Two-Rock's own output transformer means the tone and feel hold up when you drop to half power. It's built on a silver anodized chassis in the wider SSS cabinet.
Pick it for the biggest stages and the most clean headroom Two-Rock makes. The 100 runs 6L6s and is lighter. Pair it with the 2x12 SSS Width cabinet, made to match its width. The standard build is in black bronco with black matrix cloth.
The photo shows a Silver Sterling Signature head in grey suede on a 2x12 cabinet, as an example. The 150 is an inch taller. The cabinet is sold separately. Other coverings and grille cloths are available to order, and the price changes with the options chosen.
SPECIFICATIONS
AMPLIFIER
Country of Origin: USA (Rohnert Park, California)
Model: Two-Rock Silver Sterling Signature 150 Watt Head
Configuration: All-tube head
Power: 150w/75w (4) 6550 (half power scaling)
Output Transformer: Two-Rock proprietary
CONTROLS AND FEATURES
Footswitchable FET and Tone Stack Bypass
7-position High and Low Filter rotary controls
Tube driven analog spring reverb with Send and Return controls
Cathode follower: sixth 12AX7
High/Low Power switch
Passive effects loop
Speaker Outputs: 4, 8 and 16 ohm
COSMETICS
Chassis: Silver anodized
Covering: Black bronco
Grille Cloth: Black matrix
DIMENSIONS
Dimensions: 24" (W) x 13" (H) x 10 3/4" (D)
Weight: 51 lbs



