Kamis, 06 September 2012

JUAL iPhone 3Gs FU 32Gb

 Harga : Rp 2.850.000
Kondisi : 2nd (kondisi 99%) - Pemakaian Terawatt - Sudah bisa semua kartu & Baseband iPhone Normal
Warna : Black
Kapasitas : 32Gb

Ready Stok : 1 Unit

Status Barang : FULL SET, dengan kelengkapan Charger Adaptor, USB Cable Data, Earphone, Sim Tray Ejector, Guide book, Original Sticker Apple, Box, dan iPhone-nya 

Phone : 0818-813-007



HIFI ON SALE




HIFI PHILIPS

Spesification :

3 VCD MP3 PLAYER
2200 WATT PMPO
DUAL TAPE DIGITAL
SURROUND SPEAKER
REMOTE CONTROL

The price is : 750 ribu (nego)
contact : Jay 081908186721

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Rabu, 05 September 2012

JUAL MINI HIFI DVD SONY MHC GNZ888D


Jual mini hifi dvd sony mhc gnz888d
Spesifikasi :
3 DVD player
4600 watt pmpo
Doble tape auto reverse
2 speaker front 2 speaker suround 1 speaker center

Harga 2 juta (nego)
contak Jay : 081908186721

Selasa, 10 Februari 2009

HIFI

About 1920s saw the introduction of electronic microphones, amplifiers, and the application of quantitative engineering principles for the reproduction of sound. It is many of the pioneering work was done at Bell Laboratories and commercialized by Western Electric. The Acoustic disc included with capriciously peaky frequency response were replaced by electrically recorded records.

After the Second World War, several innovations created the conditions for a significant improvement of the living-audio quality:
• Improved amplifier design, with more attention to the frequency response and much higher power capability, allowing audio peaks to be reproduced without distortion.
In the 1950s, the term High Fidelity began to be used by manufacturers of audio as a marketing term to describe records and equipment that were designed to faithful sound reproduction. While some consumers simply interpreted high fidelity as fancy and expensive equipment, many found the difference in quality between "Hi-Fi" and the then standard AM radios and 78 RPM records readily visible and bought 33 LPs, including RCA Orthophonics and New London's ffrrs and high-fidelity phonographs. Audiophiles attention to technical characteristics and bought individual components, such as separate turntables, radio tuners, for amplifiers, amplifiers and speakers.
• Use Reel-to-reel audio tape recording, based on technology in Germany after the war, helped musical artists such as Bing Crosby and distribute recordings with better fidelity.
• FM radio with a wider audio bandwidth and less susceptibility to signal interference and fading than AM radio, but AM could be heard long distances at night.
• The advent of the 33 ⅓ RPM Long Play (LP) microgroove vinyl record, with low surface noise and quantitatively-specified equalization function curves. Classical music fans, the opinion leaders in the audio market quickly adopted LPs because, unlike with older records, mostly classical works would fit on a single LP.

Some enthusiasts  assembled their own loudspeaker systems. In the 1950s, hi-fi is a generic term, to some extent move phonograph and record player.
In the late 1950s and early 1960s, the development of the Westrex single-groove stereo record led to the next wave of home audio-improvement, and that in everyday language, hi-fi stereo displaced. Records were now played on a stereo.

In the world of the audiophile, however, High Fidelity, and continues to refer to the objective of very accurate sound reproduction and technological resources available for approaching this goal.

A very popular type of system for reproducing music from the 1970s and was later integrated music center combined phonograph, radio tuner, cassette player, preamplifier and amplifier in one package, often sold with a separate, detachable or integrated speakers. These systems advertised their simplicity, and the consumer to select and assemble the individual components.

Purists generally avoided referring to these systems, such as high-fidelity, although some are capable of very good quality sound reproduction.

THE HIGH-FIDELITY TEST

In a double blind experiment, neither the individuals nor the researchers know who belongs to the control group and experimental group. Only after all data are included (and in some cases, analyzed) do the researchers learn which individuals are. An often used variant of this test is the ABX test. This means comparing two known audio sources (A and B) with one of them, when it is randomly chosen (X). Despite some objections from some audiophiles, double-blind test is valid .



GO TO REALITY SOUND


The Stereo sound a partial solution to the problem of creating a semblance of the illusion of performers performing in an orchestra by creating a phantom center channel when the listener is right in the middle of the two front speakers. If the listener is slightly to the side, but it this phantom channel disappears or greatly reduced. An attempt to reproduce the reverberation is tried in the 1970s through quadrofonische sound, but, again, the technology at that time was insufficient for the task. Many consumer refuses to pay the extra cost in money and space for the marginal improvements in realism. With the rise in popularity of home theater system, however, multi-channel playback systems affordable, and many consumers are willing to tolerate the six to eight channels in a home theater. The progress of signal processors to synthesize an approximation of a great concert hall is now a more realistic illusion of listening in a concert hall.

The high-fidelity is limited to mono sound reproduction, a realistic approximation to what the listener would experience in a concert hall was limited. The overall brightness of the sound was no less than with stereo sound. Researchers quickly realized that the ideal way to music played on audio equipment through multiple channels, but the technology was not available at that time. As an example it is discovered that a realistic view of the separation between performers in an orchestra an good listening position in the concert hall would require at least three speakers for the front channels. For the reproduction of the reverberation, at least two speakers behind or to the sides of the listener were needed.


Besides spatial realism, playing music should be free of subjective noise to achieve realism. The compact disc (CD) contains at least 90 decibels of dynamic range, which is about as much as most people can tolerate in an average living room. This requires the equipment to display a signal / noise ratio of at least 90 decibels.
Audio equipment should be able to reproduce frequencies high enough and low enough to be realistic. Many adults over 25 or 30 can hear up to 15 kHz. [2] A few young people can hear to 19 kHz. [3] There is relatively little music of less than 50 Hz, loud bass below 30 Hz is rare and music under 16 Hz is almost non-existent. CDs are capable of high frequencies up to 22.05 kHz [2] and low frequencies to 10 Hz. [4]
The equipment must also be no significant distortion of the signal or emphasis or de-emphasis of any frequency in this frequency range. Except for spatial realism, good modern equipment can easily fulfill all these requirements at a relatively modest cost.
Modularity


Integrated, midi, or lifestyle systems contain one or more sources, such as a CD player, a tuner, a cassette deck or with a preamplifier and amplifier in one box. (Midi has no connection with MIDI technology in electronic instruments.) These products are usually mitigated by audiophiles, although some high-end manufacturers to produce integrated systems. The traditional hi-fi enthusiast will be a system of separates, often with each item from a different manufacturer specializing in a particular component. This offers the most flexibility for each piece upgrades.
For slightly less flexibility in upgrades, a preamplifier and amplifier in a box is an integrated amplifier, a tuner, a receiver. A mono amplifier, which is called a mono block, is often used for powering a subwoofer. Other modules in the system parts such as cartridges, tone arms, turntables, digital media players, digital audio players, DVD players that play a wide variety of discs such as CDs, CD recorders, MiniDisc recorders, hi-fi video cassette recorders (VCRs) reel-to-reel recorders, equalizers, signal processors, and subwoofers.


This modularity offers for as little or as much as he wants on a component that fits its specific needs. In a system composed of separate, sometimes an error on a component, is still part of the rest of the system. A repair of an integrated system, but complete absence of the use of the system. Another benefit of modularity is the possibility of money just a few basic components of the first and later additional components to a system. For all these advantages to the modular way of building a hi-fi system instead of buying an integrated system, audiophiles almost always fit their system of separates. Some of the obvious drawbacks of this approach are increased cost, complexity and space required for the components, not to mention the possibility of sound through the connections between components.

MODERN STYLE

The modern hi-fi equipment usually digital audio signal sources like as the CD players, Digital Audio Tape (DAT) and Digital Audio Broadcasting (DAB) or HD Radio tuners, an amplifier, a preamplifier and speakers. Some modern hi-fi equipment can be connected using Digital Toslink fiber optic cables, universal serial bus (USB) ports (including one to play digital audio files), or WiFi support.
If the hi-fi system includes components such as a projector, television, satellite decoder, DVD player, surround sound amplification and multi-channel speakers, it is often home cinema or home theater system.

For modern component that allows rapid gain in acceptance is the music server consisting of one or more hard discs of music in the form of computer files. When the music is stored in an audio file format lossless (like FLAC or Monkey Audio), unlike lossy formats like MP3, WMA, AAC and Vorbis (which all suffer from Fidelity degradation), the computer playback of recorded audio can indeed a source for an audiophile quality hi-fi system. However, it should be noted that lossy audio formats are not hi-fi in the strict sense of the word. Resolutions higher than in CD-quality with lossless files and appropriate playback equipment (professional or semipro digital to analog converters).