The speakers and room provide the vast majority of your impression of your system assuming competent amplification and source.
This is right on and my experience...
But controls of the acoustic of a room has 2 part: a passive well known one, easy to read about ; amd an active one very important and no so easy to read about and figure out...
But all that can cost peanuts with your ears and listening experiments...I transform mine without any measure, and the result is amazing on all count at nearfield or regular listening...
But decreasing the electrical noise floor of the house is very important on all aspect of S.Q. just below the acoustic controls....
I buy low cost vintage very good elements for the system.....
The more money i invest were in my homemade controls of the mechanical, electrical, and acoustical embeddings.... This is the KEY....
When you forget upgrades and listen music like never before you know you are there.....