Key kittu,
I did a side by side comparo of C405 and C605 and c605 had a lack of bass and some smoothness. They were priced same (2-3k more) and while C605 was in production, the 405 was not, I eventually picked up the 405 because they sounded better in comparison. C605s would definetely need a sub even or sterio setup.
C605s could be new to the shelf than 405s which was older and burned in. I would never know.
When I auditioned the 607 and 405, I found 405 was louder and bright ... Where 607 was much smoother and detailed .
Different ears
