Continuing the legacy of the St. James series, the St. James 100 head is the world's lightest 100-watt valve head, blending traditional craftsmanship with cutting-edge technology.

The St. James 100 head boasts various innovative and unique features that distinguish it from the competition.

Versatile Power Valve Configuration
The amplifier has two distinct power valve types: 2x 6L6 and 2x EL34. With a front-panel switch, you can toggle between these power stages in 50-watt mode or combine all four valves for the full 100-watt experience, offering unmatched versatility in sound.

Revolutionary Power Amplifier “Cut” Selector 
For the first time, Blackstar introduces a switchable “Cut” selector. This PAF three-position selector allows you to fine-tune the amplifier's higher, harsher frequencies. This customisation lets you shape the amplifier's overall sound to perfectly match your preferences, from an aggressive, extended high-end to a warm, vintage sound.

Advanced Connectivity and Tone Control
The St. James 100 head includes a built-in reactive load and Blackstar’s IR based CabRig technology, providing professional direct tones for both live performances and recording sessions. The amp also features a switchable effects loop (Series or Parallel) and an adjustable +2 - +6 dB Solo boost which is controlled via the included 6-way footswitch.

Ultra-lightweight 100 Watt valve head

3 x ECC83, 2 x EL34, 2 x 6L6

Valve mix switch for half EL34, half 6L6 or a full blend of both

Cut the selector to shape the high frequency of your sound.

Four foot-switchable channels

Footswitchable Tight and adjustable Boost options

Variable power reduction down to 5%

Master Volume

Digital Reverb