We have avoided putting a sound effect into the amplifier that may be out of style next year. Instead we use two tube stages set up like the input stage of a tube power amp. So when it is hit hard you get a breakup similar to a tube power amp. We have added body and edge controls to help you shape the sound to your situation.

Fusion heads operate from 100V to 240V, 50/60Hz mains, so you can take them anywhere in the world and simply plug in. No converters or special supplies required.

Status indicators tell you if there is a shorted output (oc) or over heated (ot) condition. Also, the standby indicator (stby) shows white when the power is off indicating the mains supply is good. If the input is overdriven the indicator on the trim knob will flash red.

Fusion heads come with a complete patch bay. The balanced DI has selectable Pre/Post and ground lift switches. Phones and Aux In are 1/8” jacks to accommodate the most common jacks used for these features. Tuner, Footswitch, Send and Return are all ¼” to better accommodate these connections. The included Footswitch turns the Overdrive Chanel on and off.

All GK amplifiers use a proprietary active, variable Q, serial four band equalizer. The Fusion is no exception except we use three tube stages as the active elements. Using tubes in the equalizer brings a warmth to the sound that compliments the already wide ranging and useful response. To further enhance the equalizer range we have added voicing filters on each section activated by pushing the control changing the color from white to blue.

To get the best match between your instrument and the Fusion we have included an adjustable input trim control. When this is adjusted so the clip light only flashes occasionally you have the perfect setup for your instrument. In addition two distinct amplifier voices can be selected by pressing the trim control (white is classic and blue is modern).

The Fusion series uses an interconnection system made with gold on gold connectors in concert with multilayer circuit boards instead of wires with crimped on tin connectors. Gold connectors will never corrode, and the multilayer circuit board provides complete shielding from outside interference.

Fusion heads are cooled using two fans that are temperature controlled. At low temperatures the fans are off, as the amplifier temperature rises the fans come on slowly and run faster the warmer the amplifier gets. Under normal operation the fans may not come on.

Fusion heads use the latest available digital power amps with switch-mode supplies. These deliver a punchy driving sound at a fraction of the weight and power consumption of analogue power systems. They are safe down to two Ohms and operate from 100V to 240V mains.

An all-aluminum anodized package reduces weight and provides a durable finish that will never corrode or discolor. Extruded aluminum parts give the amplifier sleek look from all sides. The graphics are etched into the anodized finish and will never wear off or fade with time. Convenient handles provide knob protection and make moving a breeze.

GK produces all its circuit board assemblies in house using state of the art surface mount technology. Using this technology gives us access to far more material options for our designs and makes for a more reliable product.

The Fusion uses three 12AX7 tubes from JJ which provide six stages of tube goodness. The first tube stage is used for the input amplifier, the next three tube stages are used for the active serial variable Q equalizer section and the final two tube stages are used for the overdrive section.