Skip to content

Blackstar | ST JAMES | ST-J100H | 100W Valve Amp Head

Original price $3,499.00
Original price $3,499.00 - Original price $3,499.00
Original price $3,499.00
Current price $2,795.00
$2,795.00 - $2,795.00
Current price $2,795.00
Seen it cheaper? Ask us for a PRICE MATCH
AU & NZ Shipping Free shipping over $99 within Australia and over $199 to New Zealand. Excludes bulky, heavy and rural deliveries.
14-day returns Eligible returns may be accepted as store credit within 14 days, subject to product condition and our returns policy.
Manufacturer warranty All new products are covered by the applicable manufacturer warranty and your rights under Australian Consumer Law.
{formbuilder:6507}

The Blackstar ST-J100H St. James 100w Valve Amplifier Head redefines valve amplification by combining vintage tube design with cutting-edge technology. Featuring a unique power section with two 6L6 and two EL34 power tubes, this head offers the versatility of running all four tubes for 100 watts or selecting either pair for a focused 50-watt output. Four footswitchable channels—Clean, Crunch, OD1, and OD2—are complemented by channel-specific controls, including a 3-band EQ, Reverb, and dedicated Boost and Tight switches for tonal precision.

The St. James 100 introduces a 3-position Cut switch, allowing players to fine-tune the amp’s upper-frequency response from bright and defined to warm and vintage-inspired tones. Blackstar’s renowned CabRig technology and reactive load ensure studio-grade direct tones without needing high volume, with an XLR output that precisely captures the sound of a mic’d-up cab.

Designed for modern connectivity, the St. James 100 includes MIDI Thru/In, USB-C audio output, and a switchable Series/Parallel effects loop for seamless integration into any setup.

  • 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