I find the plastic cases quite flimsy. So is there a steel case that fits a HifiBerry Amp+ on a Rasperry Pi 3 – preferably also with an option to use some cooler? Thanks!
As far as I know, there is no and never has been a steel case for the Amp+, at least not an official one from HifiBerry.
The Amp+ is no longer sold by the manufacturer, so you probably won’t find many suitable cases for it at all. The only steel case we offer is for the AMP2 and together with the Pi 4. Apart from that there are steel cases for the DACs and Digis together with the Pi 3.