The Blackstar ST-J100H St. James 100w Valve Amplifier Head brings together classic valve warmth and modern innovation in one powerful package. This versatile head features a distinctive power section housing two 6L6 and two EL34 power tubes, giving you the flexibility to run all four tubes for full 100-watt output or select either pair for a more focused 50-watt performance. Four footswitchable channels�Clean, Crunch, OD1, and OD2�provide comprehensive tonal options, each with dedicated controls including 3-band EQ, Reverb, and individual Boost and Tight switches for precise sound shaping.
The St. James 100 introduces a clever 3-position Cut switch that lets you dial in the perfect upper-frequency response, from bright and articulate tones through to warm, vintage-inspired sounds. Blackstar’s acclaimed CabRig technology works alongside the reactive load to produce professional-quality direct tones at any volume level, while the XLR output captures the authentic sound of a properly mic’d cabinet without the need for excessive volume.
Built for today’s demanding setups, this amplifier head includes comprehensive connectivity options with MIDI Thru/In, USB-C audio output, and a switchable Series/Parallel effects loop that integrates seamlessly into any professional or home studio configuration.
- Unique power section with 2 x 6L6 and 2 x EL34 tubes, switchable between 100W (combined) and 50W (independent pairs)
- 4 footswitchable channels: Clean, Crunch, OD1, and OD2
- Independent channel controls include a 3-band EQ, Reverb, Presence, and channel-specific Boost and Tight switches
- 3-position Cut switch for fine-tuning power amp response, from bright and chimey to warm and vintage-inspired
- Global Master Volume and Power Scaling knob to adjust power from 100% to 5%
- Reactive load and CabRig-equipped XLR output for direct recording with studio-quality cabinet and mic emulation
- MIDI Thru/In and USB-C audio output for modern connectivity
- Switchable Series/Parallel effects loop with adjustable +2dBu/-10dBV settings
- Lightweight and road-ready design with a durable chassis
- Includes a 6-way footswitch for comprehensive control



