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Published on October 17, 2007

Many of them might look unnecessary and incapable of working well, but they certainly do their job. Let's consider some of them in detail.

If you want perfectly customised multi-channel sound, the Alpine PXA-H701 is what you need. It is the ultimate way to add multi-channel music with sophisticated digital sound processing to any system.

You can enjoy multi-channel movie sound with Dolby Digital, Dolby Pro Logic II and DTS Digital Surround decoding through eight discrete channels. It employs the Burr Brown DAC 96kHz, 24Bit system. The PXA-H701 has a 17-band digital parametric equaliser and a 31-band graphic equaliser with sub-woofer crossover slope of 6, 12, 18, 24 and 30dB.

The Zapco SP4-SL is a hi-fidelity pre-amp with 4-band equalisers and volume, fader, sub-level and 16-volt line driver via balanced DIN cables. It can programme band equalisers in fine details in the 40Hz, 125Hz, 1KHz, and 12KHz frequency ranges. The fine-tuned details give a dramatic boost to sound quality. It is also equipped with sub-woofer crossover slope from 30Hz to 300Hz, which is needed for high-end car-audio systems.

It will give your system a good mid-range sound.

You might also like to add a smart navigation system to your car. The Kenwood KNA-G430TH is a high-performance navigation system using GPS technology with user-friendly controls. It has touch-screen control on a variety of Kenwood monitors and comes equipped with text-to-speech voice guidance in both Thai and English - like having someone navigating from the passenger seat. Built-in Thailand map data includes information such as restaurants, airports and fuel stations. The Kenwood KNA-G430TH is quite accurate, and has a trip computer featuring current, average and maximum speed and time display, multi-destination search and route variations for faster time, shorter distance or off road.

Last, but not least, is the Pioneer CD-i200 iPod adapter cable for Pioneer head units. You may have to ask installers about its compatibility if the head unit is not a Pioneer model. The CD-i200 lets you control an iPod via a compatible Pioneer in-dash stereo by sending song, artist, album and time information to your stereo's display.

Some people like to install large transformers with oversized capacitors or a battery in order to have electrical energy in reserve to produce the dynamics necessary for the music. Whatever you choose, do not forget that money is a major consideration with all of these "gadgets".

By Wijit Boonchoo

The Nation

Ultimate in Luxury

The Luxury LS 460 is a wonderfully comfaortable car fitted with all mod cons, althoough not necessarily the most fun vehicle to drive.