A rechargeable speaker that lets you enjoy up to 20 hours of accurately-reproduced music from your iPod or iPhoneat home or on the go.

iPhoneTM and iPod compatible

You can play and charge your iPhone or any iPod model with a dock connector.

Slender, portable design

The compact, rechargeable design makes it easy for you to take to picnics, parties, the backyard, or room to room.

Auxiliary input

A standard 3.5 mm stereo jack opens up your music possibilities to just about any portable music player.

2.1 speaker system

A sound system that shakes some life into your audio. It has two satellites, like a 2.0 systembut adds a subwoofer to give you a more robust sound with deeper bass. Its just as easy to set up as a 2.0 system, but the subwoofer takes up additional space.

360-degree sound

Balanced sound no matter where you are in the room. This is created by using both forward- and backward-firing drivers that project sound evenly in all directions. Also known as omnidirectional acoustics.
Learn more about 360-degree sound.

96/24 decoding

An enhanced, higher-resolution, studio-quality format available on many DVD video and DVD audio discs. Refers to 24-bit, 96 kHz audio.

Active driver

The main driver, or electromagnetic component, of a speaker. This is what makes the sound. See driver.

Analog signal

A continuous electrical signal thats commonly represented as an oscillating wave. It can take any value in a range and changes smoothly between values, as opposed to digital signals, which are characterized by discrete bits of information in numerical steps.

B

Bass

The low end of the sound spectrum that goes from 20 Hz to 200 Hz. It puts the boom, shake, and rumble into your entertainment. This is the range for explosions, tubas, cellos, bass, drums, and more. Also known as low range.

Clipping

A severe form of distortion that occurs when you overload an amplifier. It makes the sound hard and edgy.

dBs (Decibels)

A unit of measure of the relative loudness of sound. The threshold of hearing is 0 dB. A whisper is 15-25 db. A normal speaking voice is 65-70 dB. Live rock music is 120 dB and up. And a jet aircraft is about 140-180 dB. Anything over 140 dB hurts to listen to and can damage your hearing.

Digital signal

An audio signal that is usually represented by ones and zeros. A digital signal has to be converted to an analog signal before it can be turned into sound.

Distortion

Anything that alters the musical signal from its original quality.

Down-firing subwoofer

A subwoofer that has its cone facing downdirecting bass throughout the room.

DTS

DTS decoders are in virtually every major brand of 5.1-channel surround processor.

FLAC (Free Lossless Audio Codec)

A type of lossless audio compression. It doesnt remove any information from the audio stream like lossy codecs such as MP3 and AAC. That makes it a good choice for archiving audio collections as well as everyday playback. See Lossless, Lossy.

Frequency Directed Dual Drivers

A Logitech technology that uses two identical full-range drivers in each satellite. A special filter that detects specific frequencies is applied to one of the driversgradually muting specific frequencies in that driver as needed to prevent hot spots or dead zones in the soundfield. The result is better sound quality throughout the entire frequency range of the speaker.

Full-range drivers

A driver designed to reproduce most of the sound spectrum.

High-excursion drivers

High range (highs)

The high end of the sound spectrum, also known as treble. The high range goes from 4,000 Hz to 20,000 Hz. It covers stuff like bells, cymbals, and the highest notes on a piano.

Impedance

A measure of electrical resistance specified in ohms.

Long-throw subwoofer

A subwoofer that gives you higher sound levels at greater distances.

Lossy

A class of data compression that doesnt allow the exact original data to be reconstructed from the compressed data.

Matched quad micro-drivers

A set of four identical micro-drivers, offering powerful sound in a compact design.

Midrange (mids)

The middle frequencies of sound from 200 Hz to 4,000 Hz. This is the range of sound our ears are most sensitive to and includes most vocals (not the glass-breaking kind) and instruments.

MP3

A popular digital audio encoding and lossy compression format. It greatly reduces the amount of data (10:1 compression) needed to represent audio. See Lossy.

Network music player

A device that wirelessly streams the digital music stored on your computer, Internet radio broadcasts, and tracks from online music services to any room of your home. You can choose a player that connects to your stereo or powered speakers, or an all-in-one solution that has its own speakers.

Noise

Unwanted sound or distortion.

Ogg

A type of file format.

Omnidirectional acoustics

See 360-degree sound.

Peak power

The maximum wattage an amplifier can deliver as a brief burst during a musical peak. This is not an accurate measure of power. RMS power, which is standardized, should be used when you compare speakers instead.

Port

An opening in a speaker cabinet that increases the bass response of the speaker.

Pressure drivers

A driver that creates pressure inside a speaker cabinet that is sealed and airtight to move the passive radiator, increasing sound levels. This is an efficient way to create tighter, lower bass.

RMS (root mean square)

A standard amplifier measurement. Its a conventional way to measure the effective average value of an audio signal or other power (AC) voltage.

Satellites

A small speaker with limited bass response.

Signal-to-noise ratio (SNR)

A specification that describes how much noise an audio component has compared to the music signal.

Soundstage

The perception of where the different instruments and vocals are located on an imaginary stage.

Stereo XL

A Logitech technology that widens the soundstage beyond the physical boundaries of the speakers, creating an immersive audio experience.

Super regulator

THX

A series of specifications for surround sound systems. Theyre designed to ensure that the sound of movies is as close as possible to what the filmmakers intended.

Treble

See high range.

Tweeter

A small, lightweight driver for reproducing the highest musical frequencies such as violins and cymbals, and typically everything above 2,000 Hz.

Virtual surround sound

Technology that provides a rich surround sound experience with just two speakers by down-mixing Dolby Digital 5.1 channel and Dolby Surround (Pro Logic) to 2-channel audio.

Watts

A power measurement derived by multiplying current by voltage. Its used to quantify an amplifiers power output.

WMA Lossless

A lossless compressed audio file format developed by Microsoft. See lossless.