FWIW I spoke with my insurance company about whether I could obtain a "valuable personal property" policy on my gear (same policy that covers wife's engagement ring, and theoretically could cover other valuable jewelry, etc.). I was told that because the gear was not a "musical instrument" or something I used for work, they could not cover it under that. They then went on to tell me that they would cover an expensive camera. Now how some mics etc. that capture sound on an amateur basis are different than a camera that captures images on an amateur basis, I don't know.
I should ask if my renter's policy also covers it. But from what I understand, valuable personal property policies are more expansive, and even cover, for example, losing a ring down a drain or something of that nature.