I developed a rattling / buzzing noise in my 20-39 PC+. I emailed SVS late last Sunday night about the problem. I had an initial response Monday morning, and traded a few messages to clarify the problem, which they felt was with the driver. They offered for me either to ship the sub to them, or for them to ship a new driver to me to install myself, after emailing instructions to me to assess difficulty of doing so. I chose to have them ship the driver to me. They promptly let me know it would be shipped within 24 hours. I received it Friday, and replaced the driver without incident. Problem solved. That is how all companies should behave. What a more pleasant world it would be. I was already pleased with this firm, now I am a loyal fan. Their only concern was my continued satisfaction as their customer. If you have been concerned about ordering from this internet only company, I just wanted to share my personal experience. I doubt if any brick and mortar could do better. Oh yes, a personal thank you to Tom, who responded to my needs so well.