Gallien-Krueger Fusion 115 800W 1 x 15-Inch Ultralight Bass Combo Amp

GK’s Microbass and MB Series combos set the standard for performance and portability that continues to influence the industry to this day. Building on this long tradition of innovation, the Fusion Series Combos utilize GK’s unique 6 stage tube preamp, 800 watt switch mode power amp and Neodymium speakers to provide tube tone and high performance in a compact combo format that tube aficionados have previously only found in separate head and cab rigs.

Features include GK’s classic 4 band EQ, foot switchable tube Overdrive with dedicated tone control, Balanced DI with selectable Pre/ Post EQ , Effects Loop, Aux In and Headphone Output, and 2, 2.7, 4 and 8ohm Load Capacity selector to deliver optimum power when using external cabinets. Each knob is push activated allowing the user to engage the “Drive” and “Mute” functions as well as access additional voicing filters including “Voice”, “Cut”, “Body”, “Contour”, “Hi Cut” and “Presence”. The illuminated knob indicators change from white to blue as each sub function is engaged while providing the visual ques to make on the fly adjustments possible even on the darkest stages.

Fusion Combos feature a unique interconnection system utilizing circuit boards with gold plated connectors rather than cables with standard tin connectors to eliminate problems related to constant vibration and temperature extremes that can develop over time.

The Fusion Combos are available in 1×12, 1×15, 2×10, 2×12, and 4×10 speaker configurations and come equipped with Neodymium speakers designed and manufactured in GK’s California factory and high capacity 1” tweeter. This enables players to select the precise form factor best suited for their day to day needs as they travel between rehearsals and recording sessions while the 800 watt switch mode power amp provides the horsepower required to cover large stages and outdoor venues. In addition, universal power for seamless 100 to 240 volt operation makes the Fusion Series Combos well suited for everything from local jams to major tours anywhere in the world.

Four-Band EQ
The Fusion uses 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.

Universal Power
Fusion combos 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
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.

Comprehensive I/O
Fusion combos 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.

Overdrive
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.

Trim Control
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).

Interconnection System
The Fusion combos use 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. The result is a dependable long-lasting noise free connection that will never put you in the shop.

Cooling System
Fusion combos 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. This type of fan control is more expensive but minimizes noise and dust intake while maintaining the proper operating temperature inside the amplifier.

Ultralight Power Amp
Fusion combos 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.

Lightweight Construction
Fusion combos use light weight plywood construction with ample bracing to make a stiff box. The inside of the cabinet is covered with damping material to absorb high frequencies from the rear of the speaker. This prevents them from coming out the port and interfering with the high frequencies from the front of the speaker. The result is a smooth and pleasing high end response.

Additional Construction Features
A metal grill and ultra-tough cabinet coating finished with metal corners, ensure a long-lasting enclosure that will maintain its good looks over time.

Key Features

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 1/4” 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

Technical Specifications

Output Power
400W Internal (8 OHM)
800W with 8 OHM Extension
800W with 4 OHM Extension
Maximum Input Level
0.6V rms
Input Impedance
1M Ohms
Direct Output Impedance
500 Ohms
Aux-in Input Impedance
100K Ohms
Equalizer
Bass +/-10dB@60Hz
Lo-Mid +6dB/-10dB@250Hz
Hi-Mid +6dB/-10dB@1KHz
Treble +/-14dB @ 7KHz
Voicing Filters Contour
+2dB@50Hz/-10dB@500Hz/
+3dB @ 7 KHz
Noise
-90 dB reference to 800W, ‘A’ weighted
Power Requirements
120V/60Hz
1199W (full power), 168W (average power)
Dimensions
18.71″ x 19.12″ x 14.7″
Weight
32 lbs.