Blackstar SERIES ONE 100 MK II HEAD

Historical Context and Positioning Within the Range

Originally introduced in 2007, the Series One established itself as Blackstar's "high gain" flagship, with a clear philosophy: massive gain reserves that remain controlled, usable, and musically precise. The MK II version represents a refined evolution of this platform, announced as deeply optimized with numerous circuit improvements. Within the lineup, the Series One 100 MK II Head serves as the high-performance professional head: targeting demanding stage and studio use, with modern ergonomics (MIDI, effects loop, emulated output) while retaining the feel of a powerful tube amp.

Who This Amp Is For

This head is made for guitarists who prioritize precision and tight low end in their playing: modern metal, metalcore, death, thrash, djent, hard rock, but also any style requiring dense crunch and clear saturation. With its 100 watts of all-tube power, it is aimed at musicians playing in rehearsal with a drummer, on stage, and in studio, or those who want huge clean headroom and plenty of margin for pedals. In home studios, the DPR helps maintain the amp's touch and response while lowering power, allowing work at levels more compatible with close miking.

Features and Innovations

The Series One 100 MK II focuses on a 4-channel performance-oriented architecture: a Clean channel with two modes (Warm Plexi-style and Bright Class A-style) to switch from a round, thick clean to a brighter, snappier tone, then a Crunch channel with Crunch and Super Crunch modes to cover everything from sharp rock to heavy saturated rhythm. The overdrive channels are designed to deliver massive "high gain" with particular attention to signal clarity and reducing the hiss often associated with very high gain levels.

Sound shaping is enhanced by the ISF (Infinite Shape Feature), which allows shifting the EQ and voicing center of gravity between more "American" tendencies (tight lows, incisive highs) and more "British" tendencies (present mids, rougher grain). The DPR (Dynamic Power Reduction) power management adapts the response and feel under the fingers according to context, without losing the identity of a true tube power section. For global control, there are Master Resonance, Presence, and Volume knobs to adjust low-end foundation, high-end openness, and overall level.

For integration into a modern rig, the head offers MIDI implementation, a serial effects loop with level selector (handy for balancing pedals and multi-effects), and a speaker-emulated output, ideal for quick recording, feeding a PA, or keeping a simple and effective backup option. Finally, the entire unit is built to last: welded steel chassis, birch cabinet, more robust and contemporary aesthetics, and a clearly tour-oriented approach.

The Sound

All-tube, the Series One 100 MK II stands out with a dense grain and fast response, with dynamics that follow the pick attack and natural compression from the power section when pushed. Cleans range from warm vintage tones to sharper cleans useful for arpeggios, chorus sounds, and funk-rock lines. The Crunch channel serves as a perfect bridge between organic overdrive and muscular rhythm, while the overdrive channels deliver modern saturation: tight lows, controlled mids, present but tameable highs via Presence, and gain levels that remain clear on complex chords. The ISF allows fine-tuning the guitar's place in the mix, whether you want a wide, "scooped" guitar wall or a more mid-forward projection to cut through live.

Technical specifications

Category	Guitar amp head	Category	Amplifier
Technology	Tubes	Number of channels	4
Effects loop	Yes	Color	Black
Amp tubes	4 x 6L6	Finishing	Black tolex
Pre-amp tubes	ECC82, 4 x ECC83	Power output	100 W

Power	100 watts	Crunch channel	Crunch and Super Crunch modes
Preamp	4x ECC83	Master controls	Resonance, Presence, Volume
Driver	1x ECC82	Finish	black
Clean channel	Warm (Plexi) and Bright (Class A) modes