Gain
An increase in volume or amplitude, usually measured in dB.

Gas Plasma
Gas plasma emitters are a type of Horn Driver wherein a plasma or ionized gas field is developed and then propelled between two electrostatic grids. The onrushing gas is then compacted or dispersed in conformity to the frequency and level of the high voltage input signal. This type of driver, while very effective, is also extremely expensive, and so has not been commercially successful.

Generator
A machine that produces AC electricity from a rotating coil interaction within a magnetic field. In automotive applications, a rectifier is used to convert this output to DC. Also, an electronic device used for converting DC voltage into AC of a given frequency and wave shape. An amplifier is often a form of generator.

Gig
Slang for job, engagement of musicians to play and perform.

Granulation noise
A type of audible distortion resulting from quantization error in digital transmission modes.

Graphic equalizer
A multi-band variable equalizer using slide controls as the amplitude adjustable elements. Named for the positions of the sliders "graphically" illustrating the resulting frequency response of the equalizer. Only found on active (amplified)designs. Center frequency and bandwidth are fixed for each band.

Grill
A barrier meant to prevent damage to the Driver that it covers, or that creates a more attractive appearance.

Ground
A term that describes anything having an electrical potential of zero relative to other points in a circuit. Most modern vehicles are designed around a negative ground system, with the metal frame being the vehicle's ground.

Ground Loop
The term given to the condition that occurs when a voltage potential exists between two separate ground points.