Broom RM 909 Electrons

Negatively charged particles, which revolve around the centre of atoms. The movement of such electrons down a conductor causes electrical current.

Critical Distance
The point a distance away from the sound source where the direct sound and the reverberant sound are equal in volume.

Brooks Cinema XS - 45 Bridge
The bridge assembly, or just "bridge" is an area on the face of the guitar where the string meet or are connected to the face.

Axis
A line around which a device operates. Example: In a microphone, this would be an imaginary line coming out from the front of the microphone in the direction of motion of the diaphragm.

Brooks QS - 95 Line Input
An input designed to take a line level signal.

Compact Disc Recordable CDR
A blank Compact Disc that can be recorded on one time.

Interface
Any device that allows one unit to work, drive or communicate with another unit when they cannot do so by just feeding each other often because the units are manufactured by different companies.

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.