Welcome to the forum. You have gotten some good ( and some not so good) advice so far. I won't reiterate what's been said but I would recommend dumping the VTI rack. I had one briefly and I couldn't believe how much it negatively affected the sound of my system. It rings like a bell and added an unpleasant "sheen" to the music. I got rid of it pretty quick and went with a Rigid Rack from Butcher Block Acoustics.
At your level, everything makes a difference. And as others have commented, if something tips up the treble response, the result is a sense of diminished bass response. Don't rule out the solution to your problem being something simple that doesn't immediately seem plausible.
Oz
At your level, everything makes a difference. And as others have commented, if something tips up the treble response, the result is a sense of diminished bass response. Don't rule out the solution to your problem being something simple that doesn't immediately seem plausible.
Oz