I bought several BH upgrade a while back and then my life got real busy. There they sat until a couple of weeks ago. First was the PJCCS in my quickie. Then the Extended Foreplay and now the Speedball.
As some of you know I am using a 6SN7 in place of the 12AU7. In doing so I had to eliminate one of the holes that would be used for a mounting standoff for the big board. This was due to the octal socket being larger in diameter. It was strictly a mechanical thing that I managed to solve with a little creativity. The wiring was very straight forward and the documentation was spot on.
As I type this on my iPad I'm listening to a 24bit 88khz recording of Steve Hackett, Genesis Revisited. It sounds freaking amazing. After Speedball the bass and mid base are tightened up and cleaner. I never found the Crack to be lacking in this area. Now it's just better, way better. I think I gained a little on top as well. A little "sparkle" that wasn't there before. I spend a lot of time under the headphones because I keep strange hours and I don't want to disturb my family members. So this is very exciting for me.
Anyone on the fence should "just do it." I only wish I had done it sooner.
