Just been chatting with a couple of friends about headphone amp selection. Two of us thought that all amp types are available, and we have a nice selection of amps to choose from. However the third person in our discussion, who happens to be at college learning marketing, said that there is...

Hi guys,   I’ve read contradictory advice about ‘the sound of op-amps’, and it got me thinking about which top of the range equipment might contain op-amps (as opposed to tubes or circuits with individual transistors).   I’ve heard a system that had an MBL preamp and the sound was very...