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Sony has a long history of radio design. It built Japan's first transistor radio back in August 1955. Then, two years later, it launched the smallest radio in the world at the time, the TR-63. This was a truly pocketable device, setting the standard for tuners for the rest of the century.
We were disappointed with Sony's kitchen DAB, the, but its foray into the hi-fi separates market looks considerably more faithful to the high ideals of its engineers back in the 50s. At first glance the ST-SDB900 is a solid unit with both analogue and digital audio outputs to interconnect your existing stereo system.
As with all DAB separates, you'll need an existing amplifier and speaker set to plug the unit into. Unlike the headphone jack, so listening without an amplifier is not possible., this Sony radio does not have a built-in
Though DAB stations in the UK still use disappointingly low bit rates (sometimes slumping into the gutter of 80Kbps), for audiophiles there is always the option of listening to FM broadcasts on the ST-SDB900 where they're available. Of course, the overwhelming reason to listen to DAB is the sheer choice of stations, so how does this Sony compare to the competition when it comes to decoding and playing DAB broadcasts?
The clean and uncomplicated fascia on the ST-SDB900 is typical of higher-end Sony separates systems. Controls are clearly displayed, with a large tuning dial dominating the right hand side of the unit. This rapidly scrolls through stations like a traditional tuner.
Either side of the large (16x2 characters), bright LCD display are six function buttons, which let you summon menus, change band and recall memory presets. They're simple buttons not much bigger than a pinhead, and they let you operate the unit even when you've mislaid the remote control.
Sony has made one design error in this otherwise flawless chassis, and that's to run screws through the top of the casing, marring the smooth top of the system. For this reason, you probably won't want to use this DAB as the top unit in a free-standing hi-fi stack -- it doesn't quite have the style to pull it off. It's a small niggle, but it could have easily been avoided.
The ST-SDB900 uses a standard 19-inch case that stacks neatly on your existing hi-fi separates. The feet on the unit raise it about a centimetre off the ground, providing adequate ventilation for an amplifier placed below.
The rear panel on the Sony offers a sparse but well-chosen array of outputs, in the form of digital optical and gold-plated phono connectors. The ST-SDB900 doesn't have the wealth of inputs and outputs that the PURE DRX-702ES sports, but because the Sony has digital optical outs, you've got everything you should need. Anything beyond this is really only useful for extremely specialist applications at the moment.
The ST-SDB900 autotunes rapidly -- it's on a par with other separates we've tested. Radio stations are automatically listed, and you can scroll through stations using the tuning wheel. Initial setup is easy and won't tax anyone who's familiar with using a kitchen DAB, or a long-term radio user.
Hooking up the ST-SDB900 to your current stereo system can be done using the digital optical outs or the phono outs. Most listeners will find that their amplifier supports only the traditional phono connectors, in which case, a good pair of phono interconnects (a very basic set is included) will do the job of connecting the Sony to an amp.