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DAC to the future Arcam, one of the pioneers of off-board DACs re-enters the market. Ed Selley finds out if the wait was worth it Over 20 years ago Arcam produced the Back Box standalone digital-to- analogue convertor. This was one of the first (for obvious reasons, the claim to exactly who was first is hotly contested) devices that could bypass the output of an existing CD player via an S/PDIF digital output and convert it to an analogue signal via a higher-quality output stage than the CD player had internally. Consequently, the Black Box was highly regarded and sold well.

Binary beauty US valve stalwart Audio Research has launched its first Class D power amp and as Jimmy Hughes reports, its 450 watts prove addictive Given its penchant for producing large, heavy, behemoths, Audio Research’s launching of a Class D power amp is more than slightly surprising. While Pure Class A still sets a benchmark when the highest quality results take precedence, there are many practical drawbacks – excessive heat, large size, high price, massive power consumption – need one go on? The DS450, on the other hand, features an analogue-based Class D pulse-width modulated switching output stage. High output power, low-running temperature, low-power consumption and excellent sound quality are promised. But can such clever technology really challenge Class A’s sonic supremacy? Up the stakes Like most power amps, the DS450 is fairly simple.

Mobile library Malcolm Steward discovers a neat solution for losslessly storing up to 3,000 ripped CDs with zero effort, a minimal outlay and no catch The Vortexbox name represents two things: it is a suite of Linux (Fedora-based) software applications that provide users with a music library. It is also the name of the software installed on the company’s ripping NAS (Network Attached Storage) appliances. The software is freely downloadable, while the hardware – a range of fully equipped DLNA-capable (Digital Living Network Alliance) appliances – starts at the genuine value-for-money price of £385. 3,000 albums at CD-quality You can load Vortex Box software onto any PC, where once installed, it will automatically rip CDs to FLAC and MP3 files, ID3 tag those files and download the cover art.

The great transformer The valve-equipped Matrix DAC from Synthesis transforms ordinary CD players into extraordinary ones, says Jason Kennedy Sometimes a product comes along that manages to create a buzz without any fanfare whatsoever and the Synthesis DAC, from a relatively unknown Italian company, has done just that. In fact, Synthesis doesn’t even feature the Matrix DAC on its website, so full credit must go to UK distributor Audio Images, for this cunning bit of stealth marketing. Synthesis, not to be confused with Audio Synthesis of passive preamp fame, makes a system’s worth of electronics and speakers and finishes it in some very Italian colours. It’s clearly into the sound of valves, so it’s no surprise to see two pairs lying horizontally under a vent in the top of the unit, but how they fit the transformers into such a slim box is something of a mystery.