The Blackstar St. James 100 head represents a remarkable milestone in valve amplification, crafted to deliver exceptional performance with remarkable versatility. As the world’s lightest 100-watt valve head, it combines traditional British valve tones with innovative engineering, making it an essential choice for professional musicians seeking authentic, powerful sound without compromise.

Main Features

• 100 watts of valve power output
• Custom-designed lightweight Switched-Mode Power Supply (SMPS)
• Preamp section with 3 x ECC83 / 12AX7 valves
• Power amp valves: 2 x EL34 and 2 x 6L6 for diverse tonal options
• Special lightweight output transformer for enhanced tone and portability
• Four footswitchable preamp channels offering a wide tonal palette:
  • CLEAN based on Fender ‘Blackface’ Twin/Deluxe
  • CRUNCH inspired by Vox AC-30 Top Boost, with footswitchable BOOST
  • OD 1 super-crunch reminiscent of classic British overdriven amps
  • OD 2 high-gain channel voiced for modern resonant tones, plus TIGHT setting for alternative contemporary sounds
• Electronically independent 4-band EQ tailored for each channel
• Digital reverb with separate controls for CLEAN/CRUNCH and OD 1/OD 2 channels
• MASTER volume and POWER control to adjust output between 5% and 100% power
• 3-mode power valve selection switch enables switching between valve types and wattage
• Effects loop featuring selectable +4dBv/-10dBv levels and Series/Parallel modes
• Footswitchable SOLO boost with variable control for dynamic solos
• MIDI control of channels and voices for seamless integration with rigs
• Built-in reactive load for silent, direct recording
• Blackstar IR-based CabRig tech allowing emulation control via headphone, XLR, and USB outputs
• Speaker outputs for 2 x 8 ohm and 1 x 16 ohm cabinets

Versatile Power Valve Configuration

Switch effortlessly between power valve types—2 x 6L6 or 2 x EL34—in 50-watt mode, or use all four valves simultaneously for the full 100-watt output. This unique feature delivers authentic sound character from classic American to British tones, tailored to your preferences and playing environment.

Revolutionary “Cut” Selector for Tone Shaping

The innovative PAF three-position “Cut” selector controls and sculpts the amplifier’s upper frequency response. Adjust the sound from bright and aggressive highs to smooth, vintage warmth, providing unmatched control over the amp’s tonal personality.

Enhanced Connectivity and Professional Tone Control

Equipped with a flexible effects loop (Series/Parallel) and an adjustable Solo boost (+2 dB to +6 dB) controllable via footswitch, the St. James 100 is designed for rig-ready adaptability. The reactive load and CabRig IR technology ensure pristine, speaker-accurate tones for both stage and studio—directly and with headphones.

Modern Design with Classic Valve Appeal

Finished with a sleek modern aesthetic that proudly displays its valve components, the St. James 100 head blends the heritage of valve amplification with a contemporary, lightweight build. This amplifier is proof that innovation and tradition can coexist perfectly.

Elevate your tone and experience the immense power of the St. James 100 valve amplifier head. Perfect for studio recording or live performance, it is a luxury tool crafted for musicians demanding authenticity and sonic versatility.

Frequently Asked Questions ➤ What is the wattage output of the St. James 100 head?
The amplifier delivers 100 watts of valve power, with an adjustable power control that allows you to reduce output down to 5% for quieter playing or studio recording.
➤ Can I switch between different types of power valves?
Yes, the St. James 100 allows you to switch between power valves (2 x EL34 or 2 x 6L6) in 50-watt mode or use all four valves together for full 100 watts.
➤ What types of tones can I expect from the preamp channels?
You get four channels offering a wide range of tones: CLEAN (Fender Twin/Deluxe), CRUNCH (Vox AC-30 Top Boost), OD 1 (classic British overdrive), and OD 2 (modern high gain with a TIGHT mode).
➤ Does the amplifier support silent recording?
Yes, it features a built-in reactive load and Blackstar’s CabRig IR technology for silent, direct recording through headphone, XLR, or USB outputs.
➤ Is the amplifier MIDI compatible?
Absolutely, it includes MIDI functionality allowing control over channels and voice settings for seamless integration with complex pedalboards and rigs.

Outside the UK?

Please note that shipping costs outside the UK are very approximate and can vary radically. Please contact us with your Country and Post/Zip Code for an accurate quote. Many thanks. Please also note if you are outside the UK we will not charge you tax on your purchase but you may be liable for import duty in your country.

Please also note that all our stock is sold for the UK market. If you are buying from outside the UK, please check that it is suitable for use in your country before purchase.