Audio Equipment


Adjustable microphone: Headsets usually include an attached microphone that rotates up to rest flush with the headband portion of the headset or rotates downward to rest near the mouth for microphone use. Some headsets include adjustable microphones that have flexible microphone arm supports that offer positioning at infinite angles and a wide range of distances from the mouth.

Around-the-Neck Headphones: Headphones with around-the-neck design have a headband portion that extends toward the back of the user, down and under the curvature of the skull to rest behind the neck instead of over the top of the head as with traditional styles.

Boom Box: A boom box is a colloquial term referring to portable stereo, cassette, or CD players with built-in speaker and headphones jack for shared or private listening.

Cassette Player/Recorder: PA Systems and other sound equipment with built-in cassette player/recorder have a cassette tape deck capable of playing and recording standard cassette tapes.

Disposable Listening Devices: Disposable listening devices such as earbuds and headphones are ideal for museum and tourist settings, as well as airport and airplane, school, library and similar locations where one-time use economical listening devices are readily available for customers, guests, students, and patrons.

Gaming Headset
Gaming Headset

Earbuds: Earbuds are listening devices connected by a wire with plug on one end for joining with speakers, computer, MP3 player and other audio devices. The listening portion of the earbuds consists of two round components that fit just inside the ear. Earbuds can have a foam or silicon cover, hard plastic design, or cone-shaped silicon attachment to aid listening comfort.

Full-Range Speaker: A full-range speaker is designed to produce maximum sound output within the constraints of the speaker design. Full-range speakers are also known as coaxial speakers and the design is typical for PA systems and car stereo systems. The sound production from full-range speakers projects outward to fill the space available for shared listening and the volume controls offer maximum quality sound output for the speaker size, capacity, location, and use.

Gaming Headset: A gaming headset offers comfortable design for long listening sessions, with quality sound presentation to enhance the gaming experience. The headphones usually include padded or cushioned earpieces that fit over or around the ears, and many gaming headsets have an attached microphone for interacting with others through the game.

Handheld Microphone: Handheld microphones may be wireless or wired, with classic microphone shape and size for comfortable holding and use. The wired microphones will connect with a speaker or PA system for audio output. The wireless microphones will transmit the audio input from the microphone to the speaker or PA system, depending on the design.

Headphones: Headphones generally refer to listening devices with round disc or cup-like pieces that fit over or rest upon the ears. Headphones can also refer to earbuds or other listening aids.

Headset: A headset typically refers to a set of headphones that fit on or over the ears with a connecting headband and an attached adjustable microphone for voice recording, dictation, or communication.

iPod Docking Station
iPod Docking Station

Horn Tweeter: A horn tweeter is a type of loudspeaker with a horn shape. Types of horn tweeters are utilized in car stereo design, and traditional horn tweeters are seen in summer camps and similar settings for announcements, reveille, national anthem, and other announcements.

Indoor/Outdoor PA System: PA systems or public address systems designed for indoor/outdoor use offer flexible sound support, usually with microphone and speaker components, and support use indoors or outdoors. Indoor use generally includes a range specification for recommended use, such as designs suitable for rooms up to 2500 square feet or for crowds up to 500 people. Outdoor use may be limited due to the open-air environment. Megaphones are specially designed for outdoor settings and quality sound or voice projection.

Infrared Signal Headphones: Infrared signal headphones have a transmitter that usually plugs into the computer or other device via a USB port. The headphones are wireless but require a visual line to the transmitter for proper sound transmission through infrared signals, similar to remote controls. Infrared headphones are known to produce higher quality sound when compared to Bluetooth devices, and the infrared technology is common for home audio and entertainment use. Infrared signals cannot transmit through walls or obstacles.

iPod Docking Station: An iPod docking station provides connection for an iPod to accommodate shared listening via speakers or headsets. The docking station may have volume controls or other settings and provide headphone jacks for a number of users, usually supporting up to six headphone sets at one time.

Lapel Mic: A lapel mic is a small clip-style microphone that attaches to the lapel of a suit jacket or other article of clothing and serves as a hands-free microphone for presentations, speeches, events, and seminars. The lapel mic may be wired to a transmitter that is also worn by the user.

Listening Center: Listening centers are multi-user kits that include carrying case and headphones or listening devices for multiple users, often accommodating up to six people in one kit with the option to add more. The headphones all connect to a control center with shared or individual volume and listening controls. The listening control center connects to or includes CD player or MP3 player dock, such as an iPod docking system, to share sound with the users in the group.

Megaphones: Megaphones are cone-shaped handheld voice projectors used for outdoor events, crowd control, and also by law enforcement and other professionals. The shape of the megaphone helps project the voice in the desired direction and many megaphones are electronic for enhanced performance.


Microphone with Built-In Transmitter: Microphones with built-in transmitter do not require an additional transmitter, such as the bulky transmitter box, usually worn on the user's belt and connects to traditional lapel microphones.

MP3 Player: MP3 players play sound files in MP3 or related formats, depending on the device. Apple products, for example, play MP3 files made from purchased CDs, recordings, or from purchases through iTunes. Audio equipment capable of playing MP3 discs can play CD-R and/or DVD-R discs containing MP3 files.

Multichannel Headphones: Multichannel headphones allow a variety of users to adjust wireless headphones channels to reduce interference for better quality sound and listening comfort. The headphones will work together with a multichannel wireless transmitter.

Noise-Cancelling Microphone: Microphones with noise cancelling capabilities reduce the environmental noise picked up during recording for better sound quality of the recorded voice or other audio recordings.

PA Systems: PA systems, also referred to as Public Address or Public Announcement Systems, are used to direct and project voice with the aid of speakers and microphone. Integrated PA systems, such as those in school buildings, have speakers wired in desired locations to project voice throughout the building. Portable PA systems have compact size, built-in speaker and microphone support, and offer voice projection for predetermined crowd and/or room sizes.

PA Systems, Public Address Systems: PA systems offer voice projection or sound amplification for indoor or outdoor use, depending on the system design. These systems typically include a speaker or speaker set and microphone to enhance performance.

Portable PA System: Portable PA systems have carrying case designs, usually with handle or other easy-carry style. The case will have a built-in speaker on most portable PA systems, simplifying setup for presentations and other events. The microphone may be wired, plugging into the PA system directly, or wireless styles such as the lapel mic or wireless handheld microphone.

Portable PA System
Portable PA System

Portable Speaker: Portable speakers are speakers that connect to other devices for audio output. The portable designs are relatively compact, easy to carry, and usually have handles or other carrying aid built into the design.

Refresh Kits: Refresh kits provide new earpiece covers such as foam or leatherette covers to refresh headphones and headsets in library, school, classroom, or lab settings. The headphones may be assigned to a single student for the semester, term, or school year then returned, refreshed, and assigned to a new student for the following term, semester or school year.

RF Headphones: RF or radio frequency headphones operate in a similar manner as infrared headphones and like the infrared headphones, RF headphones are known to produce higher quality sound when compared to Bluetooth listening devices. RF headphones can operate at greater distances than infrared headphones from the transmitter or main device but have a higher tendency to experience interference. RF headphones can operate through “obstacles” such as walls because they do not require a direct line of sight to the target device.

Single-Use Headphones: Single-use or disposable headphones are convenient use-and-toss listening device offered at economical prices for budget shopping.

Speaker Dock for iPod, iPhone, iPad: A speaker dock provides a connection to portable device or other device for shared listening through the integrated speakers. A speaker dock designed to support iPod, iPad, and other Apple devices which have connections that support the specified devices and allow each to play sound, such as MP3s or video recordings, through the speakers for shared listening.

UHF Multi-Channel Wireless Receiver: UHF stands for Ultra High Frequency and refers to radio waves from 300MHz up to 3000 MHz (or 3GHz). This frequency range is commonly used for TV broadcasting, cordless phones, satellite signals, walkie-talkie radios, and other similar operations. A UHF Multi-Channel Wireless Receiver receives UHF signals on a range of frequencies sent from accompanying devices attached to or using a built-in transmitter.

Wireless Mic: A wireless mic is a handheld or worn microphone operating without a wire connecting it to the speaker or sound system.

Wireless RF Mic System: A wireless RF mic system includes a transmitter for the microphone that utilizes radio frequencies or RF signals to send the sound input to the receiver. The radio signals offer flexibility as they can operate through solid obstacles, unlike the classic infrared signal equipment.


AUX Jacks: Auxiliary jacks are designed to plug the device into another device for alternative use. An auxiliary jack on an MP3 player or portable CD player, for example, would allow the device to connect to speakers rather than headphones for shared listening.

Belt Pack Transmitter: Wireless microphones and lapel microphones usually include a transmitter that attaches to the speaker's belt or clothing. The transmitter captures signals from the microphone input, either wirelessly or with a connecting wire, and sends the signals wirelessly to the receiver for playing the sound on speakers or other audio setup.

Built-In Speaker: PA systems and other audio devices with built-in speaker have a speaker within the storage or carrying case, boombox, or other system design. The built-in speaker simplifies setup and use, without a need for additional equipment to produce quality sound.

Built-In Receiver: PA Systems or other audio devices with built-in receivers work with transmitted signals from portable or wireless microphones or other audio input devices for presenting quality sound.

Casters: Casters are found on the base of select audio equipment to enable rolling mobility. Some cases have two casters on one side (front or back) and a handle for tilting and rolling similar to rolling luggage styles. Other cases and equipment may have four casters, such as storage carts and mobile lecterns.

(Built-In) DVD/CD Player: Sound systems with a built-in CD player or CD/DVD player are able to support standard CDs and/or DVDs, and some styles can play MP3 files burned to a CD or DVD recordable disc.

Earpads: Earpads cover the listening portion of headphones and headsets, providing a soft contact area that rests over or fits around the ears during use. The earpads may be replaceable for continued use by different students.

Foam Ear Cushions: Foam ear cushions provide soft contact and comfortable support for users, featuring a foam cover that fits neatly over each earpiece of a headphones set. The foam cushion design relieves direct contact with the inner earpiece components, cushioning the ear from the resting headphones.

Gooseneck Mic Holder: A microphone holder with gooseneck design has a flexible, narrow post support that allows repositioning for optimal performance. The name comes from the microphone holder's resemblance to a goose's neck when curved slightly near the upper portion of the support post.

Input/Output: Input/Output refers primarily to the ports available on a sound system or other audiovisual equipment. Input ports take information, sound or media and send it to an output device, and the output ports allow the information, sound, or media to be presented, displayed or otherwise made useful.

iPod Cradle: An iPod cradle is a stand-like base that connects to the charging port on the base of an iPod and provides electrical charge for recharging and use.

Leatherette Ear Cushions: Leatherette ear cushions have padding, usually comprised of foam or similar cushioning, and a soft, leather-like covering that provides comfortable contact with ears for continued use. The leatherette ear cushions may be on over-the-ear headphone-styles or ear cup styles, and the leather-like material is easy to maintain with a wipe-clean surface.

Low-Voltage Control Module: Low-voltage control modules reduce the risk of electric shock by creating distance between the electric equipment and the user. The low-voltage control module can be a switch, remote control, or other device that allows activation of the equipment from a distance.

Mic Input: Microphone input enables the use of a microphone with the projector for clearer presentations, lectures, and conferences.

(Built-In) Microphone: Devices with built-in microphones have an integrated microphone for capturing sound with video recordings.

Microphone Outputs: Microphone outputs generally refer to the speakers or speaker system that takes the sound captured by the microphone and presents it in an audible fashion for others to hear. Microphones are essentially “input” devices and speakers are “output” devices, designed to function together.

Monitor Mount Aluminum Extension Arms: Monitor mounts with post-style design have extension arms that allow the monitor to be moved to a variety of positions. The typical design includes two extension arms, with one attached to the support post by adjustable component. The other extension arm connects to the first arm for extending the monitor further from the post, and also connects to the back of the flat screen monitor with adjustable angles for ideal monitor positioning.

(Built-In) MP3 Disc Player: Sound systems with a built-in MP3 disc player are capable of playing audio files saved to CD-R and/or DVD-R. Many styles are also compatible with MP3 players and can play music or sound files directly from the MP3 player device when the two are connected.

Multichannel Wireless Transmitter: A multi-channel wireless transmitter sends sound to headphones or listening devices wirelessly and offers the option to change the channel frequency to avoid interference or to improve sound quality. Many multichannel wireless transmitters accommodate multiple channel or frequency use within the same room.

Retractable Handle: Retractable handles refer to the extending and retracting handles added to larger portable sound system cases that resemble the retractable handles on rolling luggage. The handle pushes into the case or retracts into place for a compact overall size during use.

RF Receiver: An RF receiver is a device that receives radio frequency signals from RF devices such as wireless microphone or remote control. RF signals can transmit through obstacles, such as walls, and are commonly employed in remote control and wireless microphone designs.

Rotating Ear Pieces: Rotating earpieces are ear cups or over-ear listening portions of a headset or headphones that have pivot-style connections to the connecting headband portion of the set. Each earpiece can rotate in place, usually for 180-degrees to face the opposite direction, away from the ear when the headband is on the user’s head.

Separate Bass and Treble Controls: Audio output with separate bass and treble controls allow customization of the audio bass and treble, as well as volume controls, to enhance quality use for individual preferences. The concept recognizes that not all sound is equal and music output may benefit from different settings compared to vocal output.

Side Lift Handles: Larger PA systems and audio equipment often contain built-in side lift handles that rest against the sides of the carrying case or container and provide an easy grip hold for natural carrying by one or two people.

Silicon Earbud Tips: Silicon earbud tips have a cone-shaped design that fits slightly within the ear canal to direct sound form the listening device to the eardrums for better sound quality, reduced environmental noise interference or distractions, and improved comfort.

Single Headphone Jack: A single headphone jack refers to devices with one port for plugging in one set of headphones.

Stereo/Mono: Stereo sound is produced using two or more channels of independent audio, creating the effect of multidimensional sound for a more natural presentation or listening experience. Mono sound refers to audio played with a single channel, generally lacking the natural sound experience. Devices listed as stereo/mono can accommodate both types of sound output.

Stereo Plug with Adaptor: Headphones listed as having a stereo plug with adapter typically have a standard 1/8” plug for use with MP3 player and similar portable devices, with an included adapter piece that fits over the 1/8” plug end to create a ¼” plug for use with larger audio equipment.

Soft Cushion Earpads: Soft cushion earpads refers to the headphones design with thicker foam cushioning, often with a vinyl or leather-like covering. The thicker cushioning is designed to enhance extended use for long listening sessions in language lab, testing facility, library, or personal/home settings.

Swivel Ear Cups: Headphones with swivel ear cups have earpieces on pivot-style connectors that swivel in two or more directions for a more comfortable fit over the ears, conforming naturally to the curvature of the user’s head and ear positions.

Tripod Mount for PA Systems: A tripod mount has three connected legs that collapse and/or come together for easy transport and storage. The three legs of a tripod setup securely and the top is designed to connect with a camera, camcorder, speaker or other device. Select PA system models coordinate with optional tripod mounts for quick setup and take down as needed.

USB MP3 Input: USB MP3 input usually refers to the connector cable that joins the MP3 player to the sound system or computer. The cable will have a USB plug on one end for connection to standard USB ports and the other end of the cable will match the port on the MP3 player.

(Built-In) USB Port: Devices with built-in USB ports are designed to accept content from an external source, such as a USB thumb drive, and may offer support for transferring stored or recorded content to a USB thumb drive or computer via USB cable.

Vinyl Earpads: Vinyl earpads have foam cushion with vinyl cover providing an easy wipe-clean design. The vinyl is soft for a leather-like feel to enhance comfortable use.

Volume Controls: Volume controls are often integrated with listening center devices and sometimes built into headphones for better user comfort. Individual volume controls allow independent adjustments of the sound output level for each user, while shared volume controls adjust the sound level for all users at once.

Wall Charger: A wall charger is a power cord that connects to a rechargeable device and plugs into an electrical outlet in a wall, power strip, or other similar location.

(Built-In) 100-Watt Amplifier: Amplifiers, or amps for short, boost the signal strength while maintaining the quality of the signal. In essence, the amplifier enlarges the wave but maintains the sound. These devices are used by musicians and other performers for projecting quality sound to a larger audience and prove especially useful at outdoor events. A 100-watt amplifier projects sound at over 100 decibels, significantly louder than normal voices during conversation.

Construction Materials

High-Impact Molded Plastic: High-impact molded plastic is custom-formed to the shapes of the case or components it comprises, and offers impact-resistance for durability. The design endures frequent use in busy environments where it may be bumped or moved a lot.

Lip Edges: Lip edges are slightly raised rims around shelves or other surfaces designed to prevent items from sliding, slipping, or rolling off the surface onto the floor.


AC/DC Power: AC power refers to alternating current. Alternating current involves an electrical current that reverses the direction of flow. This is the most common type of power supply for electronic equipment in the U.S. DC power refers to direct current electricity, which has a one-direction flow and commonly used for batteries and generators.

Acoustical Ceiling: Acoustical ceilings are used to reduce ambient noise common in locations with high ceilings. The design generally involves a pattern of support bars, usually composed of metal and forming the ceiling for the entire space. The evenly distributed metal strips form a grid pattern across the ceiling and ceiling panels are positioned within each metal frame of the grid.

ASM Technology: ASM technology is Active Sound Management, which allows greater control over the sound output for higher quality listening experience. The simplest ASM technology features can include automatic stereo/mono sound detection for improve sound quality depending on the type of sound being played.

Audience Size: Microphone, speaker, and PA system specifications regarding audience size indicate the maximum group-size that the system will definitely support.

Cord management System: Overhead projectors, projector carts, and many school and office elements in our collections have integrated cord management to keep power cords neat and safe. Cord storage compartment, bins, and cord wraps built into the designs of the furniture, carts, or devices accommodate cord storage when not in use.

Eco Mode: Eco mode allows the device to operate at lower power levels or to save power when not in use. The energy-saving feature is designed to save on costs and improve performance of the device while offering the “green” operating feature.

Electrical Interference: Electrical interference would, for example, result in static or disrupted television images when older vacuum cleaners were operated around a classic television set. While modern designs take this type of interference into account and try to compensate for potential interferences, occasionally light fixtures, microwave ovens, computers and other devices can cause some interference with audiovisual equipment.

GHz: GHz stands for gigahertz. Gigahertz is a measurement unit used to quantify signal waves such as radio waves or other sound transmission. Kilohertz and megahertz are traditional signal measurements for radio and cordless devices, with gigahertz operating at a higher frequency and often utilized for more contemporary signal designs.

Green Features: Green Features refer to environmentally friendly paints, finishes, processes, and the use of recycled materials in the production of select furniture and equipment.

Interference: Interference, with regard to audio equipment, most frequently refers to the interrupted or overlapping sounds when two or more radio waves or other wave transmission superpose (or superimpose), essentially jumbling the sounds of the two transmissions. This is usually an unintentional occurrence that happens when the sounds are transmitted at the same or similar frequencies.

Megaphone Range: Megaphones are listed with their respective ranges for optimizing performance in specific situations. Most of our megaphones provide voice projection for outdoor crowds at 1/4-mile to 1/2-mile, depending on the megaphone design. The range indicates the maximum distance from the speaker that the sound can be heard and understood.

Recording FeaturesRecording features include record, playback, pause, stop, and other controls often found on digital camcorders, digital cameras, and on select devices such as tablet PC or iPad, mobile phones, document cameras, and similar technology.

Recycled materials: Many products are made with some or all recycled materials. These items are listed as having “Green Features” and detailed descriptions will specify that portions or all of the product design were made using recycled products.

Room Size: Room size specifications indicate the maximum capacity for a specific microphone, speaker, or PA system. Sound systems that are listed for up to 2500 square feet have been tested in different settings and found to provide consistent quality performance in spaces up to that size.

Software Options: Software options typically refer to the choice of Windows or Mac computer support. Some software can operate on both systems, while other software requires a product selection to ensure compatibility with the target computer system. Users operating a Mac with Virtual PC or other PC-function have some flexibility in that they can choose either the Mac software and run the program in the organic Mac OS or choose the Windows software and run it in the virtual PC.

VHF to Headphones: VHF stands for Very High Frequency and it is commonly used for radio broadcasts, in particular the FM channels, among other audiovisual tasks. The VHF waves are kept relatively local, with regard to the atmosphere, so the sound is clearer, free from most interference caused by the atmosphere of electrical equipment and devices operating at lower frequencies.

Voice Priority Settings: In general, voice priority settings, when activated, automatically lower or mute background music or sound effects playing during a presentation when the announcer or speaker begins talking into their microphone.

Voice Projection: Voice projection devices enable a speaker or presenter to reach a crowd without having to scream. Megaphones and microphones offer voice projection. While microphones operate with speakers for projecting the sound across a room or through a crowd, megaphones have a cone-shaped design for aiming the sound in a desired direction.

Voltage: Voltage refers to the electrical device’s electric potential. In the U.S. most electronics are designed for 110-120V making them safe to plug into wall outlets in any U.S. facility.

Weather-Resistant: Weather resistant indicates the case or design can tolerate exposure to hot and cold weather environments as well as light wind or rain, but should not be confused with “waterproof” designs. Weather-resistant construction is not necessarily waterproof, but can protect the equipment in light rain such as during transport, setup, or event cleanup.

Wireless Mic Range: Wireless microphones operate within a given range, meaning the microphone must remain within that distance from the receiver in order to continue operating. When the microphone is moved beyond the maximum range, the sound quality may be interrupted.

Wireless Presentation Ready: Projectors that are wireless presentation-ready can operate with an existing wireless network with built-in or optional wireless adaptor, depending on the design.

Wireless Transmission Range: Wireless transmission indicates that the images, video, or presentation accessed on one device can be sent to another device, such as a display or viewing screen, without connecting the two devices with a cable or other wire. The wireless transmission range is the maximum allowable distance at which the content can be transmitted between two devices.

Zero to Low Emission Materials: Zero emission and low emission materials refer to the production materials and processes used in creating select products. These production materials do not discharge significant quantities of pollutants or other damaging substances making the designs greener, healthier, and more life-friendly.