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Connections are found on the main unit and the subwoofer. On the underside of the main unit is a removable panel that conceals HDMI, component and RGB SCART outputs, as well as a stereo audio input. Strangely, the component and stereo audio sockets are of the minijack variety, but Philips helpfully supplies the relevant cables. On the back of the subwoofer are two sets of analogue audio inputs and a coaxial digital audio input, plus connectors for the main unit and speakers, which not only makes it mega simple to install but also reduces the amount of cables connected to the main unit when wall mounting.
The main unit also boasts a USB 2.0 port that supports DivX Ultra, MP3, WMA and JPEG playback, all of which can also be played from disc. Alongside it is a minijack input for portable music devices and the like.
Philips is never shy when it comes to features, and true to form the HTS6515 is full of tricks. Of primary interest to flat panel TV owners is the system's ability to upscale DVDs to 720p, 1080i and 1080p via HDMI, and there's a selection of picture presets (Bright, Soft and Personal) to suit different tastes.
The audio side is also well catered for, and Ambisound is the star of the show. According to the blurb, it uses the effect of psychoacoustic phenomena, array processing and precisely angled driver positioning to produce a 5.1-channel effect from any listening position, no matter the shape of your room. To optimise the effect, there are a few options in the setup menu that let you programme the room acoustics (hard or soft walls), the system's placement in the room, the distance between speakers, and the distance of the listening position from the main unit.
It works with Dolby Digital or DTS soundtracks thanks to the built-in decoders for both formats, and other audio features include Dolby Pro Logic II, DoubleBass (designed to add extra punch to music playback), FullSound, which enhances MP3 and WMA playback, plus a range of fairly pointless equaliser settings.
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