Bought these and had them installed in a 2000-ish Korean EC-1000. Glorious, simply glorious. Full, warm, articulate sound, perfectly suitable for pretty much anything, from classic rock to the metal I've been playing for almost 30 years now. They clean up pretty well, too, albeit it's not exactly my go-to scenario. The piezo/double six preset on my Cortex also works great with them. Don't be fooled by the medium output, metal amps already have enough gain, anyway.
Demoed them using 2 of my trusty Engls, an E670 and a Savage SE. Glorious!