I'm not at all clear whether the L900 addition was a waste of money. Have been listening to Dolby Atmos UHD movies and have not distinctly experienced an enhanced sound with the L900s. Need to listen more but not impressed with a significant difference thus far.
Pros: Completed the L600 speaker maximum capacity with Bi-Amping and the additional L900s.
Cons: Expensive addition which may not be a significantly noticeable enhancement
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