Seg VR 4-HIFI Información técnica

The Astin Trew Dictionary of Hi-Fi Terms 2008 We have compiled this A-Z of terms as a ‘quick guide’ for you. We've kept away from very detailed

incorporate class D designs. The jury is out on whether they ultimately offer the same fidelity as more conventional class A/B designs. Cliff effect

Codec Compression/Decompression. A system which compresses a signal in some way for storage or transportation and then decompresses it at the point o

picture to the TV is therefore via either component video connections (in which case, the TV reconstitutes the original RGB signal required for its CR

Crossover distortion A small discontinuity (or, at least, nonlinearity) in a signal when a transistor-based amplifier circuit switches from positive t

into account the impedance of the wiring between amplifier and loudspeakers, nor the impedance of the speakers' own voice coils. Consequently th

Destructive interference Where two signals, added together, act in opposition to each other and reduce the signal level. For example, bass from a sub

Dispersion The degree to which loudspeakers spread their sound production in all directions, rather than directly to their front. All loudspeakers wi

it was developed by them, but the name above seems to have come into common currency. Dolby HX Dolby Headroom eXtensioin. Not to be confused with the

matrixed into two channels. The Dolby Surround decoder extracts the additional channel, known as the surround channel, and sends it to a pair of rear

receivers incorporate DSP programs to generate ambient multichannel sound from stereo sources. DST Direct Stream Transfer. Lossless compressed DSD. D

3 way loudspeakers A loudspeaker which divides the incoming signal into three different frequency bands (normally through an electrical circuit crosso

through this layer to extract data from the bottom layer. Such a disc has, in single-sided format, a capacity of 8.5GB, rather then the 4.7GB of a si

DVD+RW A rewritable (i.e. recorded material can be erased or over-written) recordable DVD. DVD Video Digital Versatile Disc - Video. This is the form

excursion is necessary because output level is related to the area of the cone and the excursion. A smaller driver in a subwoofer can only provide eq

EQ Equalization. An adjustment to the frequency response of some piece of equipment or process in order to achieve a desired outcome. It might be pa

audio cassette undergoes this, it produces rapid variations in the playback frequency. At the slower end of the scale, it can sound like an unwanted

that the Middle C of a piano has a frequency of 261 hertz, we are actually talking about its fundamental frequency, not that of the harmonics without

Hass Effect Also known as the Precedence Effect. The human ears do not rely solely on different loudness’s to determine the direction from which a so

1080i and 1080p. 720p has a resolution of 1280 lines by 720 vertical lines and 1090i and 1080p of 1920 by 1080. 720p displays each frame in full (pr

around nine decibels higher output than equivalent non-horn loaded loudspeakers, which means they can produce the same output from just one eighth of

Impedance A measure of electrical resistance and reactance. These are the properties of a component that limit the amount of current that can flow th

considerable economies for long distance power transmission. Virtually all the counties in the world use either a 50 or 60 hertz frequency for their

Jack plug, jack or TRS connector. Familiar from the larger type of headphone jacks (or plugs), these are widely used in professional audio as well.

Line level An electrical signal at a voltage level suitable for transferring a signal between components of a home entertainment system (for example,

MB Megabyte. A measure of memory storage, a megabyte equals 1,024 kilobytes or 1,048,576 bytes. However, if used as a measure of hard disk storage,

space savings. It preserves the original signal perfectly, even through multiple encoding/decoding cycles. MMC Multimedia Card. A small, removable

some DVDs. This permits up to 7.1 channels of audio to be encoded, although only 5.1 channels is ever seen in practice and 7.1 is now obsolete. MP3

form. Rather than replacing the analogue soundtrack (which is left on for broad compatibility), the Dolby Digital data is optically recorded between

out of phase. Causes of phase shift include filters (especially those in loudspeaker crossover networks) and the (lack of) time alignment of drivers

the Never Connected power supply is perhaps the best design available, offering a high degree of isolation from the ‘dirty’ mains. Switch mode power

Reactance The aspect of impedance which varies according to the frequency of the signal it is affecting. Measured in ohms. Receiver In the stereo wor

the phono preamplifier of the playback equipment reverses this EQ, boosting the bass back to its proper level and handily cutting the treble. This la

Amp Short for ampere, or for amplifier. In the former sense, the amp is a unit of electrical current. Amps equal volts divided by resistance (or imp

SACD Super Audio CD. An audio format developed by Sony and Philips to take on DVD Audio. Both formats are being superceeded by 20 and 24 bit music d

that very modest figures like -20 or -30dB (typical of LP records) provide excellent stereo separation and imaging. More important is that the separa

S/PDIF Sony/Philips Digital Interface Format. A widely used digital audio protocol. It is used as the protocol for all consumer home entertainment e

usually applied to media / data that are distributed over the internet, where the delivery systems are either inherently streamed e.g. radio, music, t

S-VHS tape recorders, and the TVs for them to plug into. Sometimes the term S-VHS is incorrectly used instead of S-Video. Sweet spot The seating posi

the main speakers; so home theatre receivers incorporate a system to allow the sound to these speakers to be (adjustably) delayed by some milliseconds

Track The divisions within programme material on an LP, CD, SACD or audio DVD. Navigation is most easily achieved by using the forward and reverse &a

connected to the shaft. These appear in some very high quality turntables and offer particular advantages of high acceleration to speed, plus electro

higher horizontal resolution of around 300 lines, compared to VHS' 250 lines), which had beaten it to market. Eventually VHS prevailed through h

unacceptable. Digital sources such as CDs are immune to wow because they lock their playback speed to a solid-state timing device. XLR A professional

A-weighted signal to noise ratio more accurately reflects how a system's noise performance will be perceived than an unweighted measure. B Baffl

allowing sub bass units to be placed away from the stereo speakers in 2.1of 5.1 set ups. Bass extension An imprecise term concerning how low in freque

Bit The smallest unit of digital information. A single bit can carry just one of two values: 0 or 1. There are eight bits in a byte, 1,024 bytes in

Cantilever The thin rod within a turntable's cartridge that transmits the movement of the stylus in response to a record's groove to the int

In practice, there is no such noise, so initially it can be hard to see the purpose of this. Then when you consider that for most music the amplitude