Marc,
It would appear to have stereo inputs but no stereo outputs - though my assumption is that it must output stereo via the PC's sound card to the speakers and so this will be available to you that route.
The link that you gave readily gets you to an exe file containing manuals in PDF format - and below is the spec from one of them.
Bob
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Key features
• Digital or analog TV on desktop and laptop PCs
• Timer-controlled recording and timeshifting
• EPG support/program information
• Teletext
• Power supply via USB
• USB 2.0 high-speed interface, 480 Mbps
• Infrared remote control
• Digital video recorder with full MPEG2 support
• Analog video inputs, S-video and composite
• Stereo audio input
• 2 years warranty
System requirements.
• Intel Pentium 4 / AMD Athlon XP / Centrino-certified laptop /
2GHz CPU or higher
• 512 MB RAM
• 1 free USB 2.0 interface
• Audio hardware with DirectX support
• CD-R/DVD-R drive to create video CDs/DVDs
• AGP graphics card with DirectDraw drivers and video overlay support
• Terrestrial digital reception (DVB-T)
• Windows XP with ServicePack 2
Scope of delivery.
• TerraTec Cinergy Hybrid T USB XS
• USB 2.0 extension cable (0.3 m)
• Antenna adapter cable
• Video/audio/IR remote input multi-connector cable
• Rod antenna with magnetic base
• Infrared remote control including batteries
• Installation & software CD-ROM
• Online manual (on CD-ROM)
• Service request form
• Registration documents