Here is how I would test it:
I would assess how the soundbar handles excerpts from Blu-ray movies, including chapters from Star Wars: Episode I, as well as different musical tracks, including "Fast Car" by Tracy Chapman, "New Dorp. New York" by SBTRKT and more. The speaker is positioned about two meters away from the listener, with the panel assessing overall quality.
Ease of use
I would check how easy it is to use the connections, calibration options, on-screen and front panel displays, as well as the manual and any other instructions that come with the product.
I would assess the remote control to determine how easy it is to use for common functions. While not as crucial as with other home entertainment devices such as a Blu-ray player or PVR, the remote is still an important part of the functionality of any home entertainment unit. I look at button size, shape, color and grouping for ease of understanding.
I would measure the amount of power the soundbar uses when in standby mode.
I would give the soundbar a test score. The overall score would be based on the following criteria:
Sound quality (70%)
Ease of use (20%)
Remote control (5%)
Standby energy (5%)