I just a few months ago installed a RetroSound speaker in my LX450 because the passenger OEM speaker was shot - no cutting required, you can retain the factory speaker grills - follow Crutchfield's instructions EXACTLY, or you will damage the door interior trim (the black 'garnish', specifically)
speaker works fine, cost was totally acceptable, and Crutchfield instructions were key to success
incidentally, Crutchfield specifies the same RetroSound speakers for a Miata, so I had already installed them a few years ago in my littlecar when those speakers crumbled
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Hi @DSRTRDR do you by chance have a copy of the instructions? Curious what it actually entails and Crutchfield won’t share until post-purchase.