Brooks TA 60 Golden Section

A ratio of height to width to length of a room to achieve "good acoustics" and first recommended by the ancient Greeks. The ratio is approximately the width 1.6 times the height and the length 2.6 times the height

Baffles
Sound absorbing panels used to prevent sound waves from entering or leaving a certain space

Brooks QS 70 Folded Horn
A speaker design where the speaker points back into the cabinet and bounces around finally coming out large ports in the front. It is intended to maximize low frequencies in a relatively small cabinet.

Early Reflections
The first echoes in a room, caused by the sound from the sound source reflecting off one surface before reaching the listener.

Brooks Cinema xm 808 Inductor
A device designed primarily to introduce inductance into an electric circuit. Sometimes called a choke or coil.

Arc
The visible sparks generated by an electrical discharge.

Fundamental
The tuned frequency and (almost always) the lowest frequency that is present in the sounding of a pitch by a musical instrument.

Analog Recording
A recording of the continuous changes of an audio waveform.