SACD

Super Audio Compact Disc: a high resolution, read-only optical disc for audio storage

satellite speaker

A small speaker with limited bass response.

Sensitivity

The ability of an audio system to convert electrical energy (watts) into mechanical energy (Decibels of acoustical energy)

silk dome tweeters

Dome tweeters in which the dome is composed of a treated soft silk like material.

Simulated surround

An audio system which attempts to create the perception that there are more sound sources than are actually present

Solid state amp

An amplifier that uses a transistor as its main device for boosting an audio signal

Speaker Enclosure

A cabinet in which speaker drivers and other electronic hardware are mounted

SPL

Sound Pressure Level: Volume measured in decibels

Stereo sound

Two-channel sound recording that is reproduced by more than one speaker simultaneously

Stereo speaker

A two-channel sound reproduction system

subwoofer

A speaker designed to reproduce only low frequencies or bass

surround sound

Sound reproduction that uses three or more channels to enhance the listening experience

surround speaker

Speaker that works to help surround the listener with sound effects or music; works with the front speaker, placed to the left and right of the listener