How to improve bass?

[lpv]

I guess in my case this means that the placement of my speakers kills the bass. However, his part is not obvious for me. What is "f"?

just concentrate on the top calculations..

you could also play some test tones to check loudness of particular frequencies

http://www.szynalski.com/tone-generator/

 

[ID.]

You might be lucky like me and you get a bass null at the listening position no matter how you position your speakers. My living room sucks, although things are a bit better since I moved the furniture and everything around (for reasons other than my hifi, but the result was positive for both hifi and ease of use of the living room).