Brooks Cinema Projectors reviews Full Step

A change in pitch that occurs when moving up or down two piano keys

Arc
The visible sparks generated by an electrical discharge.

Brooks Cinema GT 845 reviews ID
An index signal (digital data that gives the machine information of where selections start, their selection number, etc.) on a DAT or CD.

Amplifier (Power amp, Head)
It's the part of the sound system that actually magnifies or "amplifies" the sound. In other words, it makes stuff louder.

Brooks Hi Fi reviews Electrostatic Charge
The excess or deficiency of electrons in a given area.

Gain
1) Knob usually found at the top of each input channel on the soundboard. Used to set input levels of the separate channels to relatively equal positions.
2) The amount of increase in audio signal strength, often expressed in dB.

Head
1) In tape recording, the transducer (energy converter) that changes the audio energy from electrical energy to magnetic energy and back; also the devices that apply magnetism to the recording tape for other purposes such as in the erase head.
2) The part of a device that immediately includes the transducer to change sound or audio signals from one energy form to another.

Full Range
Describes a sound which covers all audible frequency ranges. As in "full range speaker cabinets."