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Average Price: $3,000

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$300

$701+

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Based on price data from 4 merchants for "Blackstar St. James 100 100-watt Tube Combo Amplifier". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

The Blackstar St. James 100 100-watt Tube Combo Amplifier redefines the landscape of tube amplification with its innovative design and exceptional sound quality. A product of meticulous research and development, this amplifier offers a versatile tonal palette that appeals to both vintage enthusiasts and modern musicians alike. At its heart, the St. James 100 features a unique power section with two 6L6 and two EL34 tubes, allowing you to toggle between 50-watt and 100-watt outputs. This flexibility is complemented by four footswitchable channels—Clean, Crunch, OD1, and OD2—each with dedicated EQ and tone-shaping controls.

Designed with the gigging musician in mind, the St. James 100 is equipped with Blackstar’s cutting-edge CabRig technology for direct recording, capturing the full essence of a mic’d-up cabinet. The onboard power amp "Cut" control further enhances your tonal options, letting you adjust the amp's response from bright and clear to warm and vintage-inspired. With its lightweight construction and two Celestion G12Z-70 Zephyr speakers, this amplifier is not only easy to transport but also delivers a robust, full-range tone.

Whether you're in the studio or on stage, the Blackstar St. James 100 ensures your sound is nothing short of spectacular. Its comprehensive connectivity, including MIDI and USB-C outputs, makes it a versatile choice for any guitarist looking to push the boundaries of their sound.

Key Features:

  • 100-watt combo with flexible power options (50W or 100W)
  • Power section with 2 6L6s and 2 EL34s tubes
  • 4 footswitchable channels: Clean, Crunch, OD1, OD2
  • Dedicated EQ, Presence, and Reverb for each channel pair
  • Blackstar CabRig technology for direct recording
  • Power amp "Cut" control for tonal fine-tuning
  • Lightweight design with two Celestion G12Z-70 Zephyr speakers
  • MIDI Thru/In and USB-C audio output for versatile connectivity

Product specs

Type Tube
Number of Channels 4
Output Power 100W (EL34/6L6 half power switch, 5%-100% power control)
Total Power 100W (EL34/6L6 half power switch, 5%-100% power control)
Speaker Size 2 x 12" Custom Celestion G12Z-70 "Zephyr"
Preamp Tubes 3 x 12AX7
Power Tubes 2 x 6L6, 2 x EL34
Reverb Yes
Effects Overdrive
Amp Modeling 3 x Cab Rig cabinet models
EQ 2 x 3-band EQ, 2 x presence, 3-way cut switch
Inputs 1 x 1/4"
Outputs 3 x 1/4" (8/16 ohms), 1 x XLR (cab rig out), 1 x 1/4" (line out/headphones)
Effects Loop Series/Parallel FX Loop with Level switch
MIDI I/O 2 x 5-pin DIN (In, Thru)
USB 1 x USB-C
Footswitch I/O 1 x 1/4" (2-way), 1 x XLR (6-way)
Footswitch Included Blackstar FS-23 footswitch
Computer Connectivity USB
Bias Type Adjustable Fixed
Software Cab Rig
Construction Material Black Tolex
Power Source Standard IEC AC cable
Height 20.78"
Width 26.81"
Depth 10.19"
Weight 43.03 lbs.

FAQs

What are the tonal characteristics of the Blackstar St. James 100 Combo Amplifier?

The Blackstar St. James 100 offers versatile tones with its 4-channel design, providing everything from clean to high-gain sounds. Its combination of EL34 and 6L6 power tubes delivers rich harmonics and dynamic headroom, suitable for various genres.

Is the Blackstar St. James 100 suitable for live performances?

Yes, the Blackstar St. James 100's 100-watt output and dual 12" Celestion speakers make it ideal for live performances, offering powerful projection and clarity. Its power attenuation feature allows for reduced volume without sacrificing tone.

Does the Blackstar St. James 100 work well with pedals?

The Blackstar St. James 100 is designed to integrate seamlessly with effects pedals, featuring a series/parallel effects loop with a level switch for optimal signal routing and tone preservation.

How does the power attenuation feature work on the Blackstar St. James 100?

The Blackstar St. James 100 includes a power control that can adjust the output from 5% to 100%, allowing for full tube tone at lower volumes, ideal for both practice and performance settings.

What connectivity options does the Blackstar St. James 100 offer?

The Blackstar St. James 100 provides multiple connectivity options, including USB-C for recording, MIDI I/O for control, and various outputs for speaker cabinets and direct recording via XLR.

Can the Blackstar St. James 100 be used for recording?

Yes, the Blackstar St. James 100 is equipped with a USB-C output and Cab Rig software, offering direct recording capabilities and cabinet emulation for studio-quality sound.

John Browne

John Browne

UNREAL | BLACKSTAR ST JAMES 100

Video thumbnail for UNREAL | BLACKSTAR ST JAMES 100 by John Browne

UNREAL | BLACKSTAR ST JAMES 100

John Browne

John Browne

Video thumbnail for John Browne from Monuments / Flux Conduct | St. James 100 Playthrough |  Blackstar by Blackstar Amplification

John Browne from Monuments / Flux Conduct | St. James 100 Playthrough | Blackstar

Blackstar Amplification

Blackstar Amplification

Video thumbnail for THIS AMP IS UNBELIEVABLE - NEW BLACKSTAR ST JAMES 100 HEAD - FULL DEMO & NEW INSANE AMOUNT OF SPEC’s by Ninecore Neil

THIS AMP IS UNBELIEVABLE - NEW BLACKSTAR ST JAMES 100 HEAD - FULL DEMO & NEW INSANE AMOUNT OF SPEC’s

Ninecore Neil

Ninecore Neil

Video thumbnail for Blackstar St. James 100 | The World's Lightest 100W Heavy Metal Amp!! by Cameron Cooper

Blackstar St. James 100 | The World's Lightest 100W Heavy Metal Amp!!

Cameron Cooper

Cameron Cooper

Video thumbnail for If You STILL Hate Blackstar, You're Wrong by Sevenstringtv

If You STILL Hate Blackstar, You're Wrong

Sevenstringtv

Sevenstringtv

Video thumbnail for NEW AMP ALERT - SPEC RUNDOWN - BLACKSTAR ST JAMES 100 - EL34 7 6L6 IN ONE AMP? by Ninecore Neil

NEW AMP ALERT - SPEC RUNDOWN - BLACKSTAR ST JAMES 100 - EL34 7 6L6 IN ONE AMP?

Ninecore Neil

Ninecore Neil

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Blackstar St. James 100 100-watt Tube Combo Amplifier.

Features and functionality

  • The Cabsim does not accurately model the custom Celestion Zephyr speakers, lacking specific speaker options, which may cause unexpected distortion.

    Source
  • There is no easy way to adjust the line-out signal without using the editor, complicating sound checks.

    Source

Build quality

  • The amplifier uses a switched-mode power supply (SMPS), which may introduce complexity and has reported reliability issues.

    Source

Setup and maintenance

  • Some users experienced an "after note noise" developing after a few months of use, which returned even after service.

    Source

User experience

  • Owners report multiple SMPS failures, with issues arising even within warranty periods, raising concerns about long-term reliability.

    Source
  • Some Fender reissues experienced glass rattle from loose power tube socket holders, requiring tech intervention for quality improvements.

    Source
  • Users noted sound improvements after swapping out the stock neo-Jensen speaker for a neo-Creamback in the Tonemaster Deluxe.

    Source

Comparisons

  • A/B testing revealed the Pro Reverb and Tonemaster Twin with Neo Creambacks sounded indistinguishable; the Pro was favored for its tube sound and smaller form factor.

    Source
  • The Tonemaster Twin has a "mid presence" issue, described as two-dimensional in recordings, but less noticeable when playing live.

    Source
  • Owners recommend Creambacks for heavy fuzz users, suggesting the Tonemaster Twin Blonde or Pro over the standard Twin with Neo Jensens.

    Source

Critic Reviews

Blackstar's St James 100: Best of Both Worlds - gearnews.com

gearnews.com

The Blackstar St. James 100 offers an intriguing combination of power and portability, boasting a lightweight design and versatile sound options. Its dual tube configuration allows players to switch between outputs, making it adaptable for various settings. However, while the amp's features may appeal to modern musicians, the reviewer questions whether a 100-watt option is truly what players need in 2024, hinting at a saturated market. Ultimately, the St. James 100 presents an interesting blend of traditional tube tone and contemporary convenience, but it may not fully satisfy those seeking the raw power of a traditional amp.

Blackstar’s St. James 100 is its lightest 100-watt amp yet | Guitar World

guitarworld.com

The Blackstar St. James 100 is a game-changer in the realm of tube amplifiers, boasting a remarkably lightweight design without sacrificing power or tone. Its ability to switch between and mix EL34 and 6L6 tubes allows for a versatile sonic palette, appealing to modern musicians. However, while its innovative features like MIDI connectivity and a USB jack for software integration are commendable, some may find the price point a bit steep for a combo amp. Overall, this amplifier offers an impressive blend of classic warmth and contemporary convenience, making it a worthy investment for serious players.

positive

“These amplifiers set a new standard in high-performance amplification”: Blackstar unveils the St James 100, its state-of-the-art flagship tube amp and “world’s lightest” in its class – featuring switchable power tubes, CabRig tech and more | MusicRadar

musicradar.com

A powerhouse in lightweight amplification, the Blackstar St. James 100 combines innovative features with impressive sound versatility. Its unique power scaling allows for low-volume playing without sacrificing tone, while the option to mix EL34 and 6L6 tubes provides a broad sonic palette. However, while it shines in performance, some users may find the combo's weight still a bit hefty for its class, and the extra footswitch for full functionality is an added expense. Overall, this amp is a strong contender for gigging musicians seeking quality and convenience.

positive

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