Glossary of Terms

A/V - A/V is an abbreviation for Audio/Visual.

Y-Adapter - Any type of connection that splits a signal into two parts. An example would be a connector with one male RCA jack on one end, and two female RCA jacks on the other end.

Woofer - A speaker, (driver), used for low-frequency reproduction. Usually larger and heavier than a midrange or tweeter.

Midrange - A speaker, (driver), used to reproduce the middle range of frequencies. A midrange is combined with a woofer for low frequencies and a tweeter for high frequencies to form a complete, full-range system.

Tweeter - A speaker, (driver), used to reproduce the higher range of frequencies. To form a full-range system, a tweeter needs to be combined with a woofer, (2-way system), or a woofer and midrange, (3-way system).

Pre-Amplifier - Or Pre-amp is a device that takes a source signal, such as from a turntable, tape-deck or CD player, and passes this signal on to a power-amplifier(s). The pre-amp may have a number of controls such as source selector switches, balance, volume and possibly tone-controls.

Out of Phase - When speakers are mounted in reverse polarity, i.e., one speaker is wired +/+ and -/- from the amp and the other is wired +/- and -/+. Bass response will be very thin due to cancellation.

Line Level - CD players, VCRs, Laser disc Players etc., are connected in a system at line level, usually with shielded RCA type interconnects. Line level is before power amplification. In a system with separate pre-amp and power-amp the pre-amp output is line level. Many surround sound decoders and receivers have line level outputs as well.

Frequency - The range of human hearing is commonly given as 20-20,000Hz (20Hz-20kHz). One hertz (Hz) represents one cycle per second, 20Hz represents 20 cycles per second and so on. Lower numbers are lower frequencies

Gain - To increase in level. The function of a volume control.

Decibel (dB) - Named after Alexander Graham Bell. We perceive differences in volume level in a logarithmic manner. Our ears become less sensitive to sound as its intensity increases. Decibels are a logarithmic scale of relative loudness. A difference of about 1 dB is the minimum perceptible change in volume, 3 dB is a moderate change in volume, and about 10 dB is an apparent doubling of volume. 0 dB is the threshold of hearing and 130 dB is the threshold of pain.

Clipping - Refers to a type of distortion that occurs when an amplifier is driven into an overload condition. Usually the "clipped" waveform contains an excess of high-frequency energy. The sound becomes hard and edgy. Hard clipping is the most frequent cause of "burned out" tweeters. Even a low-powered amplifier or receiver driven into clipping can damage tweeters which would otherwise last virtually forever.

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VocoPro DA2277 manual Glossary of Terms
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DA2277 specifications

The VocoPro DA2277 is a versatile and powerful dual wireless microphone system designed for professional audio applications. It is an ideal choice for performers, DJs, and presenters who require high-quality sound and reliability in various performance settings. With its innovative features and advanced technologies, the DA2277 sets itself apart in the crowded market of wireless microphone systems.

One of the standout features of the VocoPro DA2277 is its dual-channel receiver, which allows users to operate two wireless microphones simultaneously. This capability is especially useful for performances that require multiple speakers or vocalists, as it enables seamless switching between microphones without any interruption in audio quality. The receiver is equipped with a clear LCD display, providing real-time information on frequency, signal strength, and battery status, ensuring users can monitor their performance effectively.

The DA2277 operates in the UHF frequency range, which allows for a more stable and interference-free signal compared to VHF alternatives. This UHF technology minimizes the risk of dropouts and ensures that audio remains crisp and clear, even in crowded environments with potential wireless interference. Additionally, the system includes a wide frequency response range, ensuring that it can capture the nuances of the human voice as well as instrumentation.

Another notable characteristic of the VocoPro DA2277 is its lightweight and ergonomic handheld microphones. Designed for comfort and ease of use, these microphones feature a dynamic capsule that delivers excellent sound quality and durability, making them suitable for a variety of performance situations. The microphones also come with built-in battery life indicators, providing users with peace of mind during extended performances.

The DA2277 is also equipped with features like automatic frequency selection and infrared synchronization, making it easy to set up and operate. Users can quickly find an available frequency and sync it to the microphones, minimizing setup time and maximizing performance efficiency.

Overall, the VocoPro DA2277 combines functionality, technology, and user-friendly design, making it an excellent choice for anyone in need of a reliable and high-performing wireless microphone system. Its dual-channel capability, UHF operating range, and precise audio capture make it an essential tool for performers and presenters alike. With the DA2277, users can focus on delivering their best performances without worrying about audio quality or reliability.
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