| • |
L - Length of wire immersed in magnetic field, in meters |
| • |
Laser Diode - A semiconductor device which emits a laser beam. |
| • |
LCD - Liquid Crystal Display. |
| • |
Lces - The electrical inductive equivalent of Cms, in henries |
| • |
Le - "This is the voice coil inductance measured in millihenries (mH). The industry standard is to measure inductance at 1,000 Hz. As frequencies get higher there will be a rise in impedance above Re. This is because the voice coil is acting as an inductor. Consequently, the impedance of a speaker is not a fixed resistance, but can be represented as a curve that changes as the input frequency changes. Maximum impedance (Zmax) occurs at Fs. " |
| • |
LED - Light Emitting Diode. |
| • |
Line Level - The standard preamplifier output level of a signal from an
audio source other than a turntable. Usually between 100mV and 1V, but may be as
high as 5V or more from some preamplifiers. |
| • |
Linearity - In an audio device, the ability to accommodate the flow of the original source signal withuot distorting or altering it in any way. A component is linear if it accurately reproduces the source signal regardless of the signal's frequency. |
| • |
Linearity Error - The deviation in response from an expected or theoretical
straight line value for instruments and transducers (speakers). |
| • |
Liquid Crystal Display (LCD) - A type of digital display made of a material
that changes reflectance or transmittance when an electrical field is applied to it. |
| • |
Load - The electrical demand of a process, expressed in current (amps),
power (watts), or resistance (ohms). |
| • |
Local / Distance Switch - Changes the sensitivity of the tuner. When switched
to local (LO), the stronger local stations are received with a higher image rejection. When
switched to distance (DX), the weaker, distant stations are received but with less image rejection. |
| • |
Loudness Control - Intended to boost low frequencies at lower volume levels and
should not be used at high volume listening levels. |
| • |
Loudspeaker - An electro acoustic transducer which converts electrical audio
signals at its input to audible waves at it's output. May also refer to a given driver of a multiple
speaker system and not to the whole speaker system as might a speaker. |
| • |
Loudspeaker Compliance - The acoustical and mechanical equivalent of capacitance.
Determines how easily a speaker cone/ voice coil assembly will move when an electrical signal
is applied to it. |
| • |
Low Frequency Driver - A loudspeaker specifically designed to reproduce
long, low-frequency wave lengths. The driver typically has a large cone, magnet structure,
and voice coil. Woofer. |
| • |
Low Pass Filter - A network of elements used to attenuate all frequencies
above a predetermined frequency. Frequencies below the cutoff point pass without any effect. |
| • |
Lows - Term which refers to a set of speaker components used to reproduce
frequencies below 500 Hz as in a set of woofers. May also refer to the low frequency drivers
of a set of separates. Not treble. |
