Masilu,
What attribute of music reproduction is missing that is preventing you from enjoying your speakers? If it is the bass then perhaps a subwoofer might be beneficial. I do not own Merlin speakers but my listening room is similar in size to yours, if not perhaps a little larger. While I enjoy my system no matter where I am seated there is a listening position relatively close to my speakers that is the most special, where the system really shines. Perhaps you will be able to find such a location in your listening room.
Bobby P. will likely be able to provide you with some helpful suggestions on getting the most from your speakers, whether it is via this thread or if you contact him directly.
