The Teufel Concept B 200 USB is a powerful stereo speaker system for the desktop with built-in USB digital audio converter.

With 2.1 or 5.1 speaker systems, it's all well and good having dinky little speakers on the desk, but to get a realistic musical span, you'll need the accompanying subwoofer too.

The separate subwoofer reinforces the low end and can vanish sonically if setup correctly, but sometimes there's simply no space to stow the required but unsightly large cube.

Full-range speakers like this Concept B 200 USB system from Teufel, meanwhile, are simpler to setup, and can sound a lot more cohesive too.

Teufel has overcome one of the limitations of small stereo speakers - limited bass and volume levels - through some clever engineering to create this, its first 2.0 system. The Teufel Concept B 200 USB is a desktop speaker package that comprises a pair of little two-way column speakers and a separate amplifier module - cunningly sporting four channels of amplification.

The Teufel Concept B 200 USB is taking the pro-audio trick of driving the speakers actively - that is, by dedicating one amplifier channel to the twin bass/mid speakers, and another for the tweeter.

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This bypasses the inefficient passive crossover that usually lives inside the speaker box; the result is typically a tighter, more controlled sound, with higher volume levels and lower distortion available than from the amp and speaker combination wired with a traditional corssover.

Each speaker of the Teufel Concept B 200 USB system is 320mm tall and includes two 60mm paper-coned widerange drivers, and a 25mm fabric dome tweeter. The box is vented through a downward-firing tuned port that aids bass extension and efficiency.

Construction of these cabinets, taking a moulded plastic shell, is sturdy enough - there's nothing in the way of rattle or buzz, and a knuckle rap is not answered by an empty echo.

The Control Station CD 200 CS is the centrepiece, featuring RCA and 3.5mm minijack analogue inputs, plus a USB digital audio input. This feeds an onboard digital-to-analogue converter, based on a 16-bit, 44.1/48kHz converter chip

Additionally there's a total of three USB A ports (one on the front, two on the back) which allow the Control Station to serve as a USB data hub when wired to a PC.

On the front panel of the Teufel Concept B 200 USB we find volume, centre-dented treble and bass control knobs, and a pair of 3.5mm jacks for headphones and microphone. That's right, you can plug in a mic for karaoke action if so desired.

NEXT PAGE: Inside the Control Station and overall sound quality evaluation >>