Glossary of Terms

  • Active - Running separate amplifiers to tweeter and midrange and woofer
  • Bridged/Bridging - Connecting two or more channels of an amplifier together
  • CanBUS - Controller Area Network. Automotive bus that allows microcontrollers to communicate
  • Class A, AB, D - Technologies used in amplifier design with differing sonic purity
  • Coaxial - Two or more-way speakers with small cones mounted inside the perimeter of big cones
  • Cone - Conical surface of a speaker used to displace air
  • Crosstalk - Unintentional interference of one signal by another due to proximity
  • Digital Signal - Sound converted to or in the form of 1's and 0's
  • Distortion - Any alteration of an audio signal other than by deliberate action 
  • Door Builds - Fabricated pods or panels for mounting speakers
  • Driver/Drive Unit - A speaker without enclosure
  • DSP - Digital Signal Processor - Sophisticated tone control
  • Dynamic Range - Difference between loudest and quietest sound that can be reproduced
  • Equalisation - Boost or attenuation of selected frequencies i.e. tone control
  • Flat Response - Signal of the same level/amplitude from 20Hz to 20Khz
  • Frequency - Pitch of a sound or note measured in Hertz
  • Full Range - Range of human hearing; 20Hz to 20KHz
  • Impedance - Load or resistance of a device. 
  • Impedance matching gets the best out of an amplifier/speaker combination. Measured in Ohms
  • Mid's - Middle frequency speakers
  • Monoblock - Mono or single channel amplifier
  • MOST - Media Oriented System Transport. Optical data buss for automotive use
  • Rear Fill - Sound from behind - unusual for stereo listening but increasingly popular for adding ambience
  • RMS - Root Mean Squared. Scientific method for measuring average power
  • Sound Curve - Plot of frequency against amplitude used to assess performance of an audio system
  • Sound Deadening - Material used to reduce panels from flexing
  • Subwoofer - Very low frequency speaker
  • Thiele Small Parameters - Used to calculate optimum enclosure size for a speaker
  • Time Alignment - Adjustment of delay of sound from different speakers to create listening 'sweet spot'
  • Tweeter - High frequency speaker
  • Ultrasonic - Above audible hearing range for humans
  • Voice Coil - Part of a speaker's motor
  • Woofers - Low frequency speakers