Large-roll Rubber Surrounds

Provide optimum cone edge suspension and allow for increase X-max.

Laser Amorphous-Tape Head

A tape head constructed from non-crystalline (Amorphous) material, cut into strips by a laser, for an accurate tape head gap. Features extended frequency response, and avoids becoming magnetized over time.

LCD

Liquid Crystal Displays offer several advantages over traditional Cathode-Ray Tube displays that make them ideal for several applications. Of course, LCDs are flat, and they use only a fraction of the power required by CRTs. They are easier to read and more pleasant to work with for long periods of time than most ordinary video monitors. There are several tradeoffs as well, such as limited view angle, brightness, and contrast, not to mention high manufacturing cost. As research continues, these limitations are slowly becoming less significant

Le

The inductance of a voice coil.

LED(s)

Light Emitting Diodes. A form of diode that sheds light. Used in many systems for indicator purposes.

Limiter

An electronic compressor with a fixed ratio of 10:1 or greater. The dynamic action effectively prevents the audio signal from becoming any larger than the threshold setting. For example, if the threshold is set for, say, +12 dBu and the input signal increases by 10 dB to +26 dB, the output only increases by 1 dB to +13 dBu, essentially remaining constant. Used primarily for preventing equipment overloads, thus reducing clipping distortion.

Line-Level

Standard +4 dBu or -10 dBV audio levels. Used in communicating standard signals between processing devices, such as : receiver to equalizer, or equalizer to amplifier.

Linearity

In an audio device, the ability accommodate the flow of the original source signal without distorting or altering it in any way. A component is linear if it accurately reproduces the source signal regardless of the signal's frequency.

Linear Movement

Referring to mechanical movement, the ability of the voice coil to move in and out in the air gap without moving side-to-side. Non-linear movement can damage the voice coil.

Linear Phase Response

Any system which accurately preserves phase relationships between frequencies.

Listening Position

A feature which can optimize frequency response and imaging for a particular position in a vehicle through the use of signal delay.

LMT

Linear Motor Technology - Proprietary woofer design that incorporates a large magnet (motor assembly) and a voice coilmounted in a long gap. This results in a lower distortion and higher efficiency woofer.

Load

The resistance or impedance to which energy is being supplied. In amplifiers, the speaker or speakers connected to the output of the amplifier.

Loss

The difference between potential energy output and actual energy output.

Loudness

A signal processing feature which compensates for the human ear's deficiencies at various listening levels.

Loudspeaker

An electro-acoustic transducer that converts electrical audio signals at its input to audible sound waves at its output.

Low Frequency

Refers to radio frequencies within the 30-300 kHz band. In audio it usually refers to frequencies in the 40-160 Hz band.

Low Pass Filter

A network of components which attenuate all frequencies above a predetermined frequency selected by the designer. Frequencies below cut-off are passed without any effect.

Lv

The length of a vent or port.