Fever noun explanation

HI-FI is derived from English and means "high fidelity".

Fire Bull Abbreviation: Bull, refers to the power transformer, ring cow refers to the ring iron core transformer. Fang Niu refers to the E-shaped iron core transformer.

CD Records A digital music disc jointly developed by Sony and Philips. It has 12cm diameter and 8cm diameter. The former is the most common. It can provide 74 minutes of high-quality music.

DVD A new-generation super-large-capacity optical disc similar to CD. It will be widely used in high-quality audio and video program recording and as a mass storage device for computers.

HDCD High DefiniTIon Compact Disc (high resolution CD)-an encoding system that improves the sound quality of CDs, compatible with traditional CDs, but it needs to be played back on a CD player with HDCD decoding or an external HDCD decoder can be improved Effect.

D / A converter A device that converts digital audio signals into analog audio signals in digital audio products (such as CDs and DVDs). The D / A converter can be made into an independent machine to match the CD turntable, which is often called a decoder.

Pre-amplifier (pre-stage) The pre-amplification and control part before the power amplifier is used to enhance the voltage amplitude of the signal, provide input signal selection, tone adjustment and volume control. The preamplifier is also called the pre-stage.

Power amplifier (back stage) is referred to as power amplifier, an electronic device used to enhance the signal power to drive the sound of the speaker. Power amplifiers without auxiliary functions such as signal source selection and volume control are called post-stage.

Combined amplifier Amplifier that combines pre-amplification and power amplification in one chassis.

Single-ended amplification The output stage of the power amplifier consists of an amplification element (or multiple elements but connected in parallel to a group) to complete the amplification of the signal plus and minus two and a half cycles. Single-ended amplifiers can only take Class A working conditions.

Push-pull amplifier The output stage of the power amplifier has two "arms" (two sets of amplification elements). When the current of one "arm" increases, the current of the other "arm" decreases, and the state of the two switches in turn. To the load, it seems that an "arm" is pushing and an "arm" is pulling together to complete the current output task. Although class A amplifiers can use push-pull amplification, it is more common to use push-pull amplification to construct class B or class A amplifiers.

Class A (Class A) A type of amplifier that does not have current cutoff (ie, stops output) at any power output element of the amplifier during the entire period of the signal (both positive and negative halves of the sine wave). Class A amplifiers generate high heat during operation, and the efficiency is very low, but the inherent advantage is that there is no crossover distortion. Single-ended amplifiers are all Class A working methods. Push-pull amplifiers can be Class A, B, or A or B.

Class B (Class B) The positive and negative half cycles of the sinusoidal signal are output by the two "arms" of the push-pull output stage, and the output of each type of amplifier is in turn. Class B amplifiers have the advantage of high efficiency, but the disadvantage is that they will produce crossover distortion.

Class A and Class B (Class AB) is between Class A and Class B. The on-time of each "arm" of the push-pull amplification is greater than half a cycle of the signal and less than one cycle. Class A and Class B amplification effectively solves the problem of crossover distortion of Class B amplifiers, and the efficiency is higher than that of Class A amplifiers, so it has been extremely widely used.

AV amplifier Amplifiers designed for home theater applications generally have more than 4 channels and surround sound decoding.

HI-FI power amplifier High-fidelity power amplifier, usually two channels, with high technical indicators.

Tube amplifier Another name for tube amplifier.

Stone machine Another name for transistor or integrated circuit power amplifier.



Bi-wiring (Bi wiring) A wiring method that uses a set of amplifiers and two sets of speaker wires to separately transmit the high and low parts of the music signal. Two-wire crossover requires specially designed speakers with two pairs of terminals.

Biamping (Biamping) Each speaker unit of a speaker is driven by a separate amplifier channel to connect. One pair of two-way speakers requires two stereo amplifiers and two pairs of speaker cables.

Dynamic range The difference in level between the strongest and weakest parts of the signal. For equipment, the dynamic range means that the equipment can handle both strong and weak signals.

Frequency response (referred to as frequency response) measures the ability of a piece of equipment to reproduce the signals of high, medium and low frequency bands evenly. There are two requirements for the frequency response of equipment. One is that the range is as wide as possible, that is, the lower limit of the frequency that can be replayed is as low as possible, and the upper limit is as high as possible.

Transient response The ability of equipment to follow burst signals in music. The equipment with good transient response should respond immediately as soon as the signal comes, and stop suddenly when the signal stops.

The signal-to-noise ratio (S / N), also known as the signal-to-noise ratio, is the contrast between the strength of the useful components of the signal and the noise, often expressed in decibels. The higher the signal-to-noise ratio of the device, the less noise it produces.
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