Chamfering can be a real PITA. The barbed t-nuts are also a heavy risk, as they don't pound in straight, and you need a really thick and large diameter fender washer to try and use the pull-in method with the bolt. Otherwise you risk denting the front face of the cabinet. I have had to resort to using a combination of both when the substrate is MDF.
I go for hurricane nuts when the substrate is plywood or better. Installation is much more consistent and reliable. There is a small risk of a spinning nut if you drill the hole too big; it pays to buy the exact sized drill bit, and a new one at that. Also, you don't need 50 foot-pounds to tighten the speaker frame; just enough is good enough. Check torque every few days for the first couple of weeks.
I go for hurricane nuts when the substrate is plywood or better. Installation is much more consistent and reliable. There is a small risk of a spinning nut if you drill the hole too big; it pays to buy the exact sized drill bit, and a new one at that. Also, you don't need 50 foot-pounds to tighten the speaker frame; just enough is good enough. Check torque every few days for the first couple of weeks.
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