B

1. Back Light:
In receivers, a display may be lit from the rear to create better visibility under a wide range of ambient light conditions.
Submitted on Saturday, April 18, 2009 8:50:38 PM

2. Back Plate-The part of the woofers metal Basket or frame on which the Magnet structure is mounted.
Submitted on Wednesday, June 18, 2008 8:50:38 PM

3. Baffle:-A flat panel that divides the front and rear sound waves produced by a woofer. Sometimes baffle is used to mean an enclosure or the front panel on which the speaker is mounted .
Submitted on Wednesday, January 14, 2009 8:50:38 PM

4. Baffle:A surface used to mount a loudspeaker.
Submitted on Tuesday, April 14, 2009 8:50:38 PM

5. Balance:
The condition of a stereo system in which both channels are reproducing the same level. (e.g., Whenever I adjust the balance control of my system, the source of sound shifts drastically to either side.)
Submitted on Tuesday, December 02, 2008 8:50:38 PM

6. Balance:The condition of a stereo system in which both channels are reproducing the same level. (e.g., Whenever I adjust the balance control of my system, the source of sound shifts drastically to either side.)
Submitted on Tuesday, March 25, 2008 8:50:38 PM

7. Balanced:Referring to wiring
Submitted on Thursday, December 11, 2008 8:50:38 PM

8. Balanced Transmission System:-A circuit topology that maintains an equal impedance between both conductors and ground. A balanced transmission must have three basic elements
Submitted on Thursday, January 17, 2008 8:50:38 PM

9. Balanced Transmission System:-A circuit topology that maintains an equal impedance between both conductors and ground. A balanced transmission must have three basic elements
Submitted on Saturday, July 24, 2010 8:50:38 PM

10. Balanced wiring
Definition:Audio line signals require two conductors. In an unbalanced line, the shield is one of those. In a balanced line, there are two internal wires plus the shield. For the system to be balanced requires output transformers and usually employs XLR connectors. Balanced lines are less apt to pick up external noise. This is usually not a factor in home or car audio, but is a factor in professional audio requiring hundreds or even thousands of feet of cabling.
Submitted on Sunday, December 30, 2007 8:50:38 PM

11. Banana Jacks & Plugs:
A set of connectors in which 4 spring contacts are wrapped vertically around a central pin like a banana peel. When inserted into the receptacle jack it maintains a strong and consistent contact. This type of connector is highly regarded as an excellent and reliable interconnector for cables between amplifiers and speakers.
Submitted on Thursday, July 30, 2009 8:50:38 PM

12. Band-limiting filters:-A low-pass and a high-pass filter in series, acting together to restrict (limit) the overall bandwidth of a system. Many audio amplifiers and processors, having switches labeled as "Rumble" or "Hiss," are filters of this type.
Submitted on Saturday, October 25, 2008 8:50:38 PM

13. Bandpass:
A filter that transmits a certain frequency band and attenuates frequencies that lie on both sides of that band. (e.g., My friend's installer used a bandpass filter to send just the mid range frequencies to his 6-inch speakers.)
Submitted on Wednesday, June 17, 2009 8:50:38 PM

14. Bandpass:
A filter that transmits a certain frequency band and attenuates frequencies that lie on both sides of that band. (e.g., My friend's installer used a bandpass filter to send just the mid range frequencies to his 6-inch speakers.)
Submitted on Saturday, July 03, 2010 8:50:38 PM

15. Bandpass (box or enclosure)
An enclosure that is specifically tuned to give maximum energy to a very limited range of frequencies, usually the lowest. In this arrangement, the woofers are fully enclosed in the box with the sound pressure being vented through one or more ports.
Submitted on Thursday, March 18, 2010 8:50:38 PM

16. Band-pass Enclosure
Definition:A multi-chambered ported system.
Submitted on Monday, April 26, 2010 8:50:38 PM

17. Bandpass filter:
A filter that has a finite passband, neither of the cutoff frequencies being zero or infinite. The bandpass frequencies are normally associated with frequencies that define the half power points, i.e. the -3 dB points. In multi-driver speaker systems, the Midrange driver may be fed by a bandpass filter.
Submitted on Sunday, May 11, 2008 8:50:38 PM

18. Band-pass filter
An electric circuit designed to pass only middle frequencies.
Submitted on Thursday, April 08, 2010 8:50:38 PM

19. Bandpass Gain:-The increase (or decrease) in efficiency of loudspeakers, due to the enclosure size and tuning. This is measured by the midband sensitivity of the speaker as a whole.
Submitted on Thursday, February 07, 2008 8:50:38 PM

20. Bandwidth:-Abbr. BW The numerical difference between the upper and lower -3 dB points of a band of audio frequencies. Used to figure the Q, or quality factor, for a filter.
Submitted on Tuesday, December 22, 2009 8:50:38 PM

21. Bandwidth
The total frequency range of any system. Usually specified as something like
Submitted on Tuesday, August 11, 2009 8:50:38 PM

22. Barium Ferrite:A speaker magnet material made from an alloy with iron and barium for improved magnetic strength.
Submitted on Tuesday, December 02, 2008 8:50:38 PM

23. Basket:
The metal frame structure of a standard dynamic loudspeaker. In larger, heavier speakers, this may be made of cast metal for extra strength and rigidity. All the other elements of the speaker are mounted on this structure.
Submitted on Wednesday, August 19, 2009 8:50:38 PM

24. Bass:-The portion of the audible sound spectrum that contains the lowest frequencies. These frequencies have the longest wavelength and require considerably greater electrical power to render them at their original strength. In a good modern speaker system, the bass portion of the response curve extends from as high as 500 hertz, down to 20 Hz.
Submitted on Thursday, January 03, 2008 8:50:38 PM

25. Bass Blockers
Definition:Commercial name for auto-sound first order high pass crossovers (non-polarized capacitors), generally used on midbass or dash speakers to keep them from trying to reproduce deep bass.
Submitted on Saturday, July 05, 2008 8:50:38 PM

26. Bass Boost/Enhancer Circuit
An active low pass amplifier section added to some receivers, equalizers, and amplifiers that allows as much as an 18 decibel boost to be applied to an audio signal in the low frequency 35 to 90 Hertz range.
Submitted on Sunday, September 07, 2008 8:50:38 PM

27. Bass Reflex
A type of loudspeaker that uses a port or duct to augment the low-frequency response. Opinions vary widely over the "best" type of bass cabinet, but much has to do with how well a given design, such as a bass reflex is implemented.
Submitted on Thursday, April 08, 2010 8:50:38 PM

28. Bass Reflex (box or enclosure):A speaker box design that makes use of a port or Passive Radiator which allows the energy derived from the motion of the back of speaker cone to be redirected in such a way as to reinforce the front radiation. This smooths and extends the low frequency response, but the effect is sharply Rolled Off on the low end, as the port signal goes back out of phase with the front. The overall effect of this is to tune the bass response to a particular point on the lower end of the spectrum, below which it rolls off sharply.
Submitted on Saturday, July 04, 2009 8:50:38 PM

29. BBE 1 & 2 Processing
Definition:A signal processing circuit that provides improvements in imaging and spatial realism by altering the frequency and phase characteristics of portions of the input signal.
Submitted on Wednesday, February 24, 2010 8:50:38 PM

30. Beaming:-A tendency of a loudspeaker to concentrate the sound in a narrow path instead of spreading it.
Submitted on Saturday, June 14, 2008 8:50:38 PM

31. Bel-Abbr. b, B Ten decibels. ( In honor of Alexander Graham Bell.) The Bel was originally a unit measure of the amount a signal dropped in level over a one-mile distance of telephone wire. See
Submitted on Thursday, February 28, 2008 8:50:38 PM

32. Bessel Alignment:A particular crossover configuration which offers superior phase coherence in exchange for slightly lower output level match.Bessel
Submitted on Monday, April 12, 2010 8:50:38 PM

33. Bessel crossover
Definition:A type of crossover design characterized by having a linear or maximally flat phase response. Linear phase response results in constant time-delay (all frequencies within the passband are delayed the same amount). Consequently the value of linear phase is it reproduces a near-perfect step response with no overshoot or ringing. The downside of the Bessel is a slow roll-off rate. The same circuit complexity in a Butterworth response rolls off much faster.
Submitted on Sunday, January 18, 2009 8:50:38 PM

34. Bi-Amplification:
Some speaker systems with multiple drivers do not contain a crossover network, and they require a separate amplifier for each frequency range. The bi-amplified system still requires an active crossover network to send the proper frequency band to each amplifier and speaker, but it is in the circuit preceding the amplifier and speaker and does not handle the power output.
Submitted on Thursday, March 20, 2008 8:50:38 PM

35. Bi-amplify
Definition:The use of two amplifiers, one for the lows, one for the highs in a speaker system. Could be built into the speaker design or accomplished with the use of external amplifiers and electronic crossovers.
Submitted on Thursday, January 24, 2008 8:50:38 PM

36. Bipolar Transistor-A older but still effectively used transistor type that contains two p or n junctions or diodes between two layers of opposite polarity material (emitter and collector) . In handling large power, mostly replaced by MOSFET types.
Submitted on Wednesday, January 14, 2009 8:50:38 PM

37. Bi-wiring:-The use of two pairs of speaker wire from the same amplifier to separate bass and treble inputs on the speaker.
Submitted on Wednesday, September 08, 2010 8:50:38 PM

38. BL:(measured in Tesla meters) The product of a speaker driver's gap flux density and the length of the voice coil conductor in the gap.
Submitted on Wednesday, September 22, 2010 8:50:38 PM

39. Blank Skip:A cassette feature that automatically detects blank areas of the tape over a set number of seconds in length and activates Fast Forward, until either the end of the tape, or audio information is reached.
Submitted on Thursday, September 11, 2008 8:50:38 PM

40. BNC:-A type of high precision connection often used in instrumentation and sometimes in digital audio. BNC connectors sometimes are used for digital connections such as from a CD Transport to the input of a DAC.
Submitted on Friday, October 23, 2009 8:50:38 PM

41. BNC:-A type of connection often used in instrumentation and sometimes in digital audio. BNC connectors sometimes are used for digital connections such as from a CD Transport to the input of a DAC.
Submitted on Sunday, April 25, 2010 8:50:38 PM

42. Boomy
Usually refers to excessivly reverberant bass response, or a peak in the bass response of a recording, playback, or sound reinforcement system.
Submitted on Monday, June 28, 2010 8:50:38 PM

43. Boomy
Listening term, refers to an excessive bass response that has a peak(s) in it.
Submitted on Thursday, April 30, 2009 8:50:38 PM

44. Boost
Definition:To raise the level of a signal. The opposite of cut. (e.g., We used my equalizer to boost the highs going to my tweeters.)
Submitted on Saturday, July 26, 2008 8:50:38 PM

45. Boost-To raise the level of a signal. The opposite of cut. (e.g., We used my equalizer to boost the highs going to my tweeters.)
Submitted on Thursday, December 10, 2009 8:50:38 PM

46. Box-Another, and common name for a standard speaker enclosure. There are many variations in type, which are basically compromises between size, power handling, cost, frequency response, and many other considerations. Bridge Mounted (2 & 3-way speakers)
Submitted on Saturday, March 29, 2008 8:50:38 PM

47. Bridged
The condition that exists when a load is connected across two active channels that are fed with the same input signal, but one of the channels is operated out-of-phase with respect to the other. (e.g., The reason we used the amplifier in its bridged configuration was to use both amplifier channels to power a single speaker.)
Submitted on Thursday, September 09, 2010 8:50:38 PM

48. Bridged
The condition that exists when a load is connected across two active channels that are fed with the same input signal, but one of the channels is operated out-of-phase with respect to the other. (e.g., The reason we used the amplifier in its bridged configuration was to use both amplifier channels to power a single speaker.)
Submitted on Monday, January 25, 2010 8:50:38 PM

49. Bridged Power-Bridging an amplifier, combines the power output of two channels into one channel. Bridging allows the amplifier to drive one speaker with more power than the amp could produce for two speakers. Because of this high power output, bridging is the best way to drive a single subwoofer. If the amp is bridgeable, the owner's manual will have directions that tell you how. Usually, an amp is bridged by connecting the speaker leads to the positive (+) terminal from one channel and the negative (-) terminal from the other channel. However, be sure to consult your owner's manual before attempting to bridge your amp!Also, keep in mind that most amplifiers need to see a 4-ohm load when bridged to mono operation. When bridging an amplifier, use one 4-ohm speaker or, if you prefer multiple woofers, connect two 8-ohm speakers in parallel. Again, consult your manual before operating your amp in bridged mode.
Submitted on Sunday, November 02, 2008 8:50:38 PM

50. Bridging:Combining both left and right stereo channels on an automotive amplifier into one higher powered mono channel. When an amplifier is bridged, the impedance that the amplifier actually "sees" is calculated based upon the output of both stereo channels. Here is a simple formula to help define this
Submitted on Friday, January 04, 2008 8:50:38 PM

51. Bright:
Listening term. Usually refers to too much upper frequency energy.
Submitted on Friday, August 06, 2010 8:50:38 PM

52. BTL
Bridged, Transformer Less. A circuit design wherein two small Integrated Circuit (IC) amplifier channels are bridged together to provide a single, larger output circuit. These circuits are limited by their current capabilities and the amount of heat they generate.
Submitted on Wednesday, October 29, 2008 8:50:38 PM

53. BTM-Best Tuning Memory. A feature in which the tuner selects radio stations by signal strength, and assigns them to presets in numerical order, according to their frequency value.
Submitted on Thursday, June 24, 2010 8:50:38 PM

54. Built-in Crossovers
Definition:Frequently used to limit the high-frequencies reaching a subwoofer, a low-pass filter crossover allows only frequencies below the crossover point to be amplified. A high-pass crossover allows only frequencies above the crossover point to be amplified — used to keep destructive low bass away from small speakers, so they can played safely. Crossovers may be variable or selectable. Continuously Variable means the crossover circuit can be adjusted to any frequency between the listed end points. Selectable means that any of several preset crossover points can be chosen to accomodate variuous driver (speaker) designs.
Submitted on Wednesday, July 07, 2010 8:50:38 PM

55. Bullet Horn (tweeter)
A type of tweeter in which the radiator has a large passive, bullet-shaped device above its center that extends the nominal dispersion angle of the sound, thus allowing it to cover a greater area with high frequency radiation
Submitted on Friday, June 27, 2008 8:50:38 PM

56. Bumped:A method of woofer construction in which the rear suspension system is anchored a little further back by designing the back plate so that it is press stamped, or cast, outward. This allows greater Excursion of the voice coil, and prevents "bottoming out," which is very destructive to the coil form when large signals move the voice coil beyond its range limits. This technique does not eliminate the problem, but does help to reduce it.
Submitted on Friday, August 07, 2009 8:50:38 PM

57. Bumped & Vented:See discussion of Bumped above. Many higher power speakers have a vent hole in the center Pole Piece of the magnet. When viewed from the back, there is usually a screen over the hole to prevent debris or particles from falling into the voice coil gap. But it does allow for greater ventilation of the motor section, and this in turn provides for higher power inputs by permitting greater heat dissipation for the voice coil assembly.
Submitted on Monday, February 08, 2010 8:50:38 PM

58. Buss or Bus:-A signal-carrying conductor or electrical pathway designed to carry multiple signals. A mixing console auxiliary bus may carry signals derived from several channels on that console. The term is sometimes used to refer to a power distribution circuit, or "mains".
Submitted on Tuesday, April 13, 2010 8:50:38 PM

59. Butterworth crossover-A type of crossover circuit utilizing low-pass filter design characterized by having a maximally flat magnitude response, i.e., no variation in the amplitude response in the domain of the passband.
Submitted on Friday, February 13, 2009 8:50:38 PM

60. Butterworth crossover:
A type of crossover circuit design having a maximally flat magnitude response, i.e., no amplitude ripple in the passband. This circuit is based upon Butterworth functions, also know as Butterworth polynomials.
Submitted on Sunday, May 11, 2008 8:50:38 PM

61. Butyl:A type of rubber used for speaker surrounds. Butyl has very good damping characteristics and is resistant to UV contamination from the sun.
Submitted on Thursday, January 01, 2009 8:50:38 PM

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