Hissing from Martin Logans Arias i's

I'd check for dust accumulation. Try powering down the speakers for a couple of hours and then carefully vacuum both front and back stator panels. You can contact M-L as they are very helpful with recommendations. Good luck.

They probably need vacuumed. Carefully vacuum the panels. Martin-Logan recommends doing this 2-3 times a year. My SL3's were hissing and vacuuming resolved it. Hope this helps.

Thanks for the reponses. I broke out the vac and it significantlly decreased the hiss. I only hear it if I put my ear right next to the panel. Thanks all...OBTW anybody know the cost to replace the panels?

Probably around $4-500. The panels should last many years. If the volume starts to fade in one or both, that is the time for panels, not before.