Here goes my grain of salt. I recently bought a Project Debut Carbon. Out of the box I was impressed with the depth of the bass and the
"envelope" of the sound: rich, vivid and what I thougt "natural". On analogplanet.com vinyl guru Michael Fremer talked about the Project Speed Box II as an add on that improves the sound of the table. So I stepped into the upgrade ladder, and bought this tiny box.
First I felt "pretty disappointed with the Pro-ject Speed Box mkII", but then I made the logical move: I compare the table with and without the
Speed Box, and now I understand: Yes, it seems like if the dynamic range is lost but NO, what really happens is that the bass is tighter, less "loose", more precise, so the QUALITY of the sound is better. The treble is less piercing, more natural and maybe you think there is less "air" but what is happening is that hte treble is sweeter, more precise but less prominent. The midrange sounds "easygoing".
In my case, the most dramatic change was that I perceived less motor and background sound, which the Project Carbon has specially at the outer grooves. It has been +4 years since the first comment appeared here, but hearing closely and critically let me had the same experience the "pro" writers said. Thumbs up for the Speed Box II !!!