Amp Shut Down?

[KliqueOC 10+ year member]

I have an Alpine mrx-m100 powering a 15" type R, and tyesterday I was playing a very bass heavy song pretty loud and during a long bass note, my bass went out. I went to the stereo shop shortly after and I blew my inline fuse under the hood (4 gauge wire btw, no big 3 upgrade yet). Popped in a new fuse and the sub/amp would turn on and off intermittently. Eventually it just stopped working later that day and hasn't worked since.

The guy at the shop told me my sub was on the way out, but I removed the sub and inspected it, as well as test the impedance of each voice coil and everything looked good. So now I am suspecting the amp. After checking into it further I realized the power light on my amp wasn't illuminated with car/music on. Checked the 4 25A fuses on the amp and they're all good. Is it possible I blew my amp with the fuses still being good? Or maybe it went into some kind of protection mode? Any advice before I go back to the shop tomorrow and spend more $$??

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[dragnix 5,000+ posts]

Try changing the fuses on the amp, sometimes they may look good but are blown