I aked a question on the Bose forum and got this reply:

Topic: Can two L1's or Compacts produce stereo?

Posted Thu October 22 2009 08:09 AM
Hi cassp,

Here is a link to search results for stereo on the L1 wiki.
http://toonz.ca/bose/wiki/inde...ereo&searchx=Search+

The L1s work great in stereo. Whether or not it is neccessary or better than mono is a personal decision.

O..
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