Getting Personal Property Insurance for your rig.

My hi-fi is covered as personal property under my policy.

That's how it works. Increase the value of your personal property to reflect your HIFI's value and take photos, keep receipts, and serial numbers.

For those who have an extensive and higher end collection of LP(s),
I would seek an independent insurance agent that specializes in such matters.  Most (read all) insurance companies will attempt to "cheap out" if a substantial claim is made.

@jafant , if you have rare, "collectable" LPs, then it would make sense to find an independent agent to insure these items.
But, as far as equipment goes, it's only treated as hardware.

Read your policy. Most homeowners policies don't cover things such as LPs, CDs, or computer software. They typically don't cover art, jewelry beyond a small limit or anything business related.

It's absolutely worth the effort to be sure that what you need protected is, indeed, covered under the policy. That way, if you have a claim, there should be no ambiguity. That's been my experience.

If your policy DOES cover LP's, get an appraisal of your collection by a local rare record dealer in writing.