I've replaced my wheel-barrow inner tube with a Neuance shelf. Bass is better controlled. Treble is perhaps more detailed and cleaner. I found that sticking a couple of sheets of self-stick asphalt (unpeel it from the trunk of your car!) on the CDP lid is easier, more stable on an air bladder, and takes much less space than mass-loading. Ernie
Sand bags under a cdp - didn't work well
Last night I started the process of vibration control with the use of sand bags (3) under my Arcam cdp. What I found was that while everything became more focused/detailed it also became more sharp/harsh/forward/aggressive. I didn't know what to expect but it certaintly wasn't this. Van Morrison's voice on trk #5 on Sailing to Philadelphia was abnormally aggressive and in the end I preferred the sound without the bags. Any thoughts as to why things became too sharp & aggressive????