We put the Tripp-lite Isobar Ultra in all of our machines at work (we make half of the worlds computer hard disc drive suspensions for the reader head), and that works very well isolating nasty motor drives from delicate communications buses. I can't imagine a worse environment than in one of our machines where there is 208 volt three phase, 120 VAC, 24VDC and motor drives along with DC relay coils, PLC's and computers along with a bunch of stuff going to ground. If this device can isolate these horrible conditions, it can make someones hifi incoming "filtered".
Wayner