Blackstar ST. James 100 Head vs Carr Mercury V

The Blackstar ST. James 100 Head and the Carr Mercury V are both amplifiers sharing crunchy, glassy, transparent. The Blackstar ST. James 100 Head leans tight and bright. The Carr Mercury V leans warm.

Similarity
citedBlended from circuit-archetype lineage, dynamic feel, tone-signal overlap and tone-vector distance — the tone vector itself is derived from editorial description text, not a measured acoustic signal, so this reflects how similarly the catalog copy describes the two, not a lab measurement. Shown only within a gear class, and only where there's enough evidence to be meaningful.

74% — moderately similar

Shared genres
citedGenres both listings are associated with.
  • Rock
  • Classic Rock
  • Blues
Shared tone character
citedDerived from overlapping tonal signals across both listings.
  • crunchy
  • glassy
  • transparent
  • dynamic
  • high gain

Carr Mercury V

Carr · amplifier

Citation fame
citedCitation/mention fame — how often this gear is cited across artist rigs and gear discussion.
0%
0%
Price

$1746.60via Reverb

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Description

The Blackstar St. James 100 is a two-channel EL34-powered tube guitar amplifier head combining American-voiced clean tones with British-voiced overdrive, designed as a lightweight handcrafted valve head with features including a sag control, effects loop, and reverb. Channel 1 delivers big, open clean tone with clear black-panel-influenced headroom; Channel 2 produces British crunch that leans toward Vox chime and articulation rather than Marshall darkness, making it unsuitable for saturated high gain but excellent for chimey, cutting rock and blues. Reviewers describe the EL34 version as combining world-class British crunch with US-sounding clean tones in a design notably lighter than comparable valve heads.

The Carr Mercury V is a 16-watt Class A boutique guitar combo amplifier built by Steve Carr in North Carolina, powered by 6V6 tubes with a built-in three-position Boost switch and attenuator. A Plexi-inspired dual-input preamp section delivers warm 6V6 response from crystalline American blackface clean tones through AC30-style chime, Marshall Bluesbreaker-era snarl, and into high-gain territory. The Mercury V dynamic range spans the tonal evolution from 1960s American clean through British crunch and high-gain lead. Built-in spring reverb is praised as among the finest production onboard reverb units, and the attenuator enables power-tube saturation at bedroom and studio volumes. Premier Guitar called it one of the finest-sounding amps they had ever played.

Genres
citedGenres this gear is documented as being used in.
  • Alternative Rock
  • Jazz
  • Funk
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Tonal lean
  • tight
  • bright
  • saturated
  • warm
Good for
citedOccasions this gear suits — judged per model, or derived from its wattage, connectivity and category.
  • Live
  • Practice
  • Studio
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