10

ULTRA-G GI100 User Manual

The GI100 features a switchable speaker simulation, developed in collaboration with 

renowned amp designer Jürgen Rath, which adds the sound of a 4 x 12" cabinet to your 

direct guitar signal at the touch of a button. Analog speaker simulations, offering the 

possibility to get a typical guitar cabinet sound to tape or to a PA without the necessity of 

cabinets or microphones, have been available since the mid-80’s. Since then, the appeal of 

“instant sound” via simulation as a means of reducing equipment and hassle has continuously 

grown. Having developed a great deal of convincing guitar gear with various manufacturers, 

Jürgen Rath was an obvious choice for us in developing our VIRTUAL 4 x 12" CABINET 

speaker simulation. In the words of Germany’s top specialty publication GITARRE & BASS, 

“The Virtual Cabinet delivers an authentic 4 x 12" simulation with impressive sound, 

cutting power and clear reproduction.” (Michael Dommers, 8/97)

1.  Controls

(8)

(7)

(6)

(1)

(5)

(2)

(3)

(4)

Fig. 1.1: The GI100’s front and back panels

(1) 

The VIRTUAL 4 x 12" CAB speaker simulation can be switched on and off with the 

SIMULATOR ON/OFF

 switch.

(2) 

When activated, the 

GND LIFT

 breaks the ground connection between input and output. 

Depending on the grounding of the connected equipment, this can eliminate hum or 

ground loops.

(3) 

OUTPUT TO MIXER

 is the GI100’s balanced, mic level output. Use a high-quality, 

balanced XLR (microphone) cable to connect the ULTRA-G to a console.

◊  You should never connect pins 2 or 3 with pin 1 or remove the shield from pin 1. 

Otherwise, it will not be possible to operate the unit with phantom power.