GK's revolutionary Fusion S Series Heads merge the rich, warm character of tube preamps with the lightning–fast response of Class D power sections, creating a sonic combination that's uniquely powerful. These high–powered heads feature three 12AX7 tubes in the preamp section, including one specifically dedicated to the overdrive channel – marking GK's first–ever tube–driven overdrive implementation. The illuminated knobs not only provide practical benefits for stage performance by making tone adjustments easier in low–light conditions, but also add a striking visual element that enhances your stage presence.
Each illuminated control knob incorporates push–button activation, unlocking additional voicing filters and tonal characteristics that expand your sonic palette. The Fusion S series employs the same sophisticated interconnection system found in the Legacy Series, utilising circuit boards with gold–plated connectors instead of traditional cables with tin connectors. This construction method eliminates reliability issues that can develop from constant vibration and temperature extremes during heavy touring use, ensuring consistently pure sound reproduction.
The comprehensive feature set includes GK's renowned 4–band EQ, tube overdrive with dedicated tone shaping controls, and multiple push–button voicing filters including "Bump", "Contour", and "Presence". Professional connectivity options encompass a balanced DI with pre and post EQ settings, effects loop, auxiliary and headphone connections, plus load capacity selection that optimises power output across 2, 2.7, 4, and 8–ohm cabinet configurations.
- Six Stage Tube Preamp with (3) 12ax7s
- Four band active EQ
- Foot Switchable Tube Overdrive with Tone Control (Footswitch Included)
- Illuminated Knobs with Push Activated “Voice”, “Cut”, “Body”, “Bump”, “Contour”, “Hi Cut” and “Presence” Voicing Filters
- "Bump", "Contour", and "Presence" Voicing Filters
- Balanced XLR Output Selectable Pre and Post EQ
- Unbalanced ¼” Send and Return
- Aux Input and Headphones Output
- Twist Lock Speaker Outputs
- 2, 2.7, 4 and 8ohm Load Capacity
- 800 watt Switch Mode Power amp
- Neodymium Speakers
- 1” Tweeter
- Fusion 210: 24.60“ x 19.12” x 14.70” 38.0 lbs



