It doesn't "have" to be a load bearing wall. It's just that a load bearing wall is likely to be better coupled to the mass of the house. So vibration damping will be better. The more firmly attached the non-load bearing wall is, the more likely it will mimic the effect of being a load bearing wall. If you're in a basement with a concrete floor, a spiked floor standing table or rack should be fine. It will serve the same purpose as a load bearing wall since you're coupling it to the mass of the house.
Linn Sondek Hype
So, it seems after reading a few threads there is something of a prejudice against the sondek. Well after now owning one I am not sure that it is warranted, to say it simply, I am in love. I mean wow, just plain old floored. Of course I also have Mcintosh equipment, so I am used to reading how horrible my stuff is. I am just wondering if the little table from Ikea is really a viable table for the Linn. I got a great deal on the Linn, but I am now broke, so cheap suggestions only.