Reference
Professional Audio Glossary
Plain, accurate definitions of the loudspeaker and professional audio terms used across our product specifications and guides. For the fuller technical picture, see our technical guides.
- BIS Certification
- Certification from the Bureau of Indian Standards confirming a product meets applicable Indian regulatory and safety/quality standards.
- Compression Driver
- A horn-loaded high-frequency transducer that uses a small diaphragm to produce high sound pressure through acoustic compression, coupled to a horn for efficient projection.
- Cone
- The moving diaphragm of a loudspeaker driver, bonded to the voice coil former, which pushes and pulls air to produce sound. Commonly made from paper pulp, coated paper, polypropylene, or aluminium.
- Crossover
- A circuit (passive, using inductors/capacitors, or active, using electronic processing) that splits an audio signal into frequency bands and routes each to the appropriate driver — e.g. lows to a woofer, highs to a compression driver.
- Diaphragm
- The thin moving dome (titanium, aluminium, or polymer film) inside a compression driver that produces high-frequency sound, analogous to a cone in a woofer.
- Directivity
- How a loudspeaker's output varies by angle — a speaker's horizontal and vertical coverage pattern, usually specified in degrees (e.g. 90° x 60°).
- DSP (Digital Signal Processing)
- Processing an audio signal digitally to apply EQ, crossover, time alignment, and driver protection — commonly built into modern PA amplifiers.
- Excursion (Xmax)
- The maximum linear distance a driver's voice coil and cone can travel from rest position while remaining in the magnet's linear field, before distortion increases sharply.
- Ferrite Magnet
- A ceramic magnet material commonly used in loudspeaker motor assemblies — heavier and lower-cost than neodymium for equivalent magnetic field strength.
- Former
- The cylindrical tube (aluminium, kapton, fibreglass, or nomex) that a voice coil is wound onto, which bonds to the cone or diaphragm.
- Frequency Response
- The range of frequencies a loudspeaker or component can reproduce, usually specified with a tolerance (e.g. ±3 dB) across a stated range in Hz.
- HF Driver (High-Frequency Driver)
- A driver, typically a compression driver, dedicated to reproducing the high-frequency portion of the audio spectrum in a multi-way speaker system.
- Horn
- A flared acoustic waveguide coupled to a compression driver, which controls directivity and increases efficiency by acoustically matching the driver to the room.
- Impedance
- The AC electrical resistance a loudspeaker presents to an amplifier, measured in ohms (commonly 4Ω, 8Ω, or 16Ω in professional audio) — must be matched within the amplifier's rated load range.
- Line Array
- Multiple identical loudspeaker enclosures stacked vertically so their combined wavefront behaves more like a single tall source than independent point sources, extending usable throw distance and enabling tuned vertical coverage.
- Magnet Assembly
- The ferrite or neodymium magnet, top plate, and pole piece that together create the fixed magnetic field a driver's voice coil moves within.
- Neodymium Magnet
- A rare-earth magnet material offering the same magnetic field strength as ferrite at a fraction of the weight and size, at a materials cost premium.
- OEM Manufacturing
- Original Equipment Manufacturing — producing products or components to a client's specification, for sale under the client's own brand.
- PA System (Public Address System)
- A system of microphones, mixers, amplifiers, and loudspeakers used to reinforce speech and/or music for an audience.
- Point Source
- A loudspeaker system that radiates sound from a single cabinet or small cluster, spreading energy in a cone-shaped pattern that follows the inverse square law with distance.
- Recone
- A speaker repair process that replaces the voice coil, cone, spider, and surround as a matched assembly while reusing the magnet structure and frame — the standard repair path when the magnet and basket are undamaged.
- Sensitivity (SPL)
- How efficiently a driver converts electrical power to acoustic output, usually specified as sound pressure level (dB) produced at 1 metre with 1 watt of input power.
- Sound Reinforcement
- The use of amplification and loudspeakers to reinforce live sound (speech, music, performance) for an audience larger than could be reached by unamplified acoustic sound alone.
- Spider
- A corrugated fabric suspension component mounted between a cone's neck and the driver frame, which centres the voice coil in the magnetic gap while allowing linear excursion.
- Stage Monitor
- A loudspeaker, typically wedge-shaped, positioned to face performers on stage so they can hear themselves and other performers clearly during a live performance.
- Subwoofer
- A loudspeaker enclosure dedicated to reproducing low-frequency content (typically below 100–120 Hz), used alongside full-range speakers to extend bass response.
- Surround
- The flexible ring at a cone's outer edge that seals it to the driver frame while allowing excursion — commonly foam, rubber, or treated cloth, and a common failure point with age and UV exposure.
- Throw Distance
- The effective distance a loudspeaker system can project intelligible, adequately loud sound before level drops below a usable threshold.
- Voice Coil
- A cylindrical winding of wire wound onto a former and suspended in a driver's fixed magnetic field, which converts the amplified electrical signal into the mechanical motion that produces sound.
- Woofer
- A driver optimized for reproducing low and mid-low frequencies, typically featuring a larger cone than a mid-range or high-frequency driver.