My Mission Cyrus One amplifier is great, but it doesn’t have a headphone socket. I now use an external headphone amplifier, driven from the tape out RCA sockets. Before I made that investment I got great results from this modified speaker switch box.
Carnforth railway station, and it’s clock in particular, are famous from the film “Brief encounter “. Correctly located in the corners of a large room in the visitors centre were a pair of these beauties.