I recently had the same upgrade as Bhoage (new batteries, jumpers, lead free power cable for the SBAM). I agree with everything that Bryan said, and for me, the improvement was well worth the small amount of money spent.
One of the nice things about living only 3 hours from Hemlock NY is that I can go down and visit Bobby. It is a wonderful drive and the scenery around Hemlock is stunning! While I didnt get to see Debbie on this visit, I did speak to Bill and Bobby quite a bit. Anyway, I brought my SBAM that I bought with my VSM-MX 2 years ago to mainly get the batteries changed (change your batteries at least every 2 years guys). While there, Bobby discussed passionately the merits of his lead free speaker system. He now uses a 3 metal solder (tin, silver, and copper I believe) instead of a 4 metal solder (tin, silver, copper, and lead). To demonstrate the difference with just the SBAMs, we inserted 2 SBAMs in his system (mine and his newest lead free one). With both using RCA connections and just the batteries (mine now with the new fully charged ones) and Bobby quickly switching the RCA connections to hear his and my SBAM in the system, there was a noticeable difference. The new lead-free SBAM sounded fuller, more musical. I then proceeded to mention to Bobby that he was a f*cking jerk (thats just the kind of relationship I have with him) because it did indeed sound better and now I had a decision to make whether to get the full lead free speaker system. He did mention that (a) he didnt know it was going to sound this much better he was just getting his speaker system RoHS compliant and (b) this could be done with my speaker system (replacement of the SBAM and scrape out the solder in the speakers and replace with the 3 metal version) to achieve very close the VSM-MXe speaker system.
One of the nice things about living only 3 hours from Hemlock NY is that I can go down and visit Bobby. It is a wonderful drive and the scenery around Hemlock is stunning! While I didnt get to see Debbie on this visit, I did speak to Bill and Bobby quite a bit. Anyway, I brought my SBAM that I bought with my VSM-MX 2 years ago to mainly get the batteries changed (change your batteries at least every 2 years guys). While there, Bobby discussed passionately the merits of his lead free speaker system. He now uses a 3 metal solder (tin, silver, and copper I believe) instead of a 4 metal solder (tin, silver, copper, and lead). To demonstrate the difference with just the SBAMs, we inserted 2 SBAMs in his system (mine and his newest lead free one). With both using RCA connections and just the batteries (mine now with the new fully charged ones) and Bobby quickly switching the RCA connections to hear his and my SBAM in the system, there was a noticeable difference. The new lead-free SBAM sounded fuller, more musical. I then proceeded to mention to Bobby that he was a f*cking jerk (thats just the kind of relationship I have with him) because it did indeed sound better and now I had a decision to make whether to get the full lead free speaker system. He did mention that (a) he didnt know it was going to sound this much better he was just getting his speaker system RoHS compliant and (b) this could be done with my speaker system (replacement of the SBAM and scrape out the solder in the speakers and replace with the 3 metal version) to achieve very close the VSM-MXe speaker system.