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Almost-invisible cinema sound
IF YOU'RE thinking about a home theatre system and are at all concerned that the hi-fi gear and loudspeakers will dominate your room decor, visit a Bose hi-fi retailer and audition the new Lifestyle 12 home theatre system. But if you're expecting to discover a routine system of bulky components and loudspeaker enclosures, be prepared to be amazed by the Lifestyle 12's virtual invisibility. The heart of the system is a tiny music centre which houses a high- sensitivity AM/FM tuner and quick-access CD player. How to Install Speakers in a Car

The elegantly styled music centre is about the size of a book or photo album and is designed to be kept, conveniently but none the less inconspicuously, on a coffee table or shelf. The system can be controlled and programs switched either at the music centre itself or via radio remote control that does not have to be within sight of or even aimed at the unit in order to be effective. The remote will operate the system even through non-metallic walls, including brick.
Perhaps more relevant to its home theatre focus, the music centre is equipped with left and right video sound inputs for a stereo VCR, TV or Laserdisc player. It also hosts Bose's newly developed Videostage surround-sound steering technology. Videostage is the Bose equivalent of the "decoder" that is generic in home theatre systems like the widely popular Dolby Prologic. It teases out the complex stereo signals recorded on CDs and movie soundtracks and steers the various signals to their respective speakers left, right, centre and surround to sculpt sharper, more realistic sound fields.
According to the general manager of Bose Australia, Mr Bob Schenk, Videostage was developed from scratch by Bose engineers and is tailored specifically for the home listening environment. The home normally had unique spatial, architectural and acoustic differences compared with cinemas for which other decoding algorithms might have been developed and later adapted to home theatre applications, he said. Each integrated Lifestyle 12 system comes complete with five matched imaging speakers (the tiny cubes).
This means that sounds created in all imaging channels will normally be of similar timbre as far as speaker influence on sound quality is concerned. (A sound image traversing the sound field from front to rear or from left to right should not change in character because of subtle differences in speaker performance, as might occur in systems using a variety of speakers in different channels.) The imaging amplifiers are also matched to their respective imaging speakers including the speaker-amplifier interfaces (and speaker cables), a feature that can be less predictable in systems with random combinations of speakers and amplifiers of mixed origins. The imaging amplifiers in the Lifestyle 12 are rated at a practical 40 watts per channel.
A separate amplifier is also dedicated to the Acoustimass woofer. Power rating for the bass amplifier is 80 watts. Mr Schenk said a further important attribute of the combined Videostage steering technology, component matching and system fine tuning in the Lifestyle 12 is the phase relationship of sounds in complex scores, especially bass notes produced simultaneously at different speakers in the system. At best, phase aberrations tend to muddy or blur the sound. At worst, some sounds may cancel incidentally, at the listening position, and lessen the aural impact of the system. Videostage inherently tracks and maintains correct phase relationships. What size speakers are in my car Medium.com
As well, the natural tendency for our hearing to be less sensitive at extreme bass and treble a phenomenon traditionally catered for by the loudness control in stereo amplifiers is automatically compensated for and tends to maintain a more natural tonal balance in program material played at all volume levels. Demonstrations using videomovies on Laserdisc were most impressive. The system also lends itself to a variety of installation possibilities. Depending on the furnishings and size of the room, the cubespeakers, each not much bigger than a cricket ball, can be strategically positioned on shelves or suspended from the walls or ceiling using optional, articulated mounting brackets that can be locked in position to focus the sound on the audience area.

Decorative floor stands for the cubes are also available through Bose stockists. To further disguise the visual presence of the system in the room, the larger Acoustimass bass module may be secreted behind a sofa or under a coffee table without impairing bass response or sound field imaging. With the system operating normally, it is difficult not to believe that all of the sound including the deep rich bass from the hidden Acoustimass module is emanating from the tiny cubes.
Five pairs of cubes are supplied with the Lifestyle 12. These comprise the regular front-left and front-right stereo channels; a front-centre channel for stabilising dialogue and other on-screen sounds from movie soundtracks; and two surround channels that may be installed either behind or flanking the prime listening area to create acoustical environment effects and a sense of audience participation in the on-screen action. Recommended retail price for the complete Lifestyle 12 home theatre system is $4350. This includes the music centre, five pairs of cubes, one Acoustimass bass module complete with all amplifiers and crossovers, speaker wires and cables and one (white) radio remote control. The cubes and optional adjustable brackets are available in black or white finish and the complete system is packaged in a single, car-loadable carry carton. Top best rated car speakers in the world | Best 4 inch, 4x6, 6.5, 6x8, 6x9 on the market
 
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