Tvad is correct. I have a 4Bst - Changes are in your imagination. If you want it to sound better it will.
Have a friend change in/out without your knowledge - you won't know when it's in or out. Don't buy into the BS. Save $ and spend on something that counts.
Have a friend change in/out without your knowledge - you won't know when it's in or out. Don't buy into the BS. Save $ and spend on something that counts.