I wonder if anyone can suggest whre I could buy a 'box' that would
compress music to a reduced dynamic range.

I listen to the radio in my office at work. there is quite high
backgound noise (about 45dB) from computes in my office but I don't
want to disturb by neighbours though the partition walls.

I listen mainly to Radio 3 on DAB so my source is not compressed. At
the moment I am foreever turning the volume up and down.

thank you,

Robert