I don't know about the newest since I generally only get alpine amps that are no longer under warranty.
The ones from a few years ago have a lot of high frequency noise that passes through their output filters but it's essentially inaudible (but it looks awful on the scope).
The problem I have with them is they are overly complex and can be difficult to repair.
If you're going to buy an alpine class D amp, I'd suggest finding where you have to send it for repair under warranty and the cost for repair after the warranty period has ended. Do this before you buy one.
The ones from a few years ago have a lot of high frequency noise that passes through their output filters but it's essentially inaudible (but it looks awful on the scope).
The problem I have with them is they are overly complex and can be difficult to repair.
If you're going to buy an alpine class D amp, I'd suggest finding where you have to send it for repair under warranty and the cost for repair after the warranty period has ended. Do this before you buy one.