[stevehertz]

Out of interest, the use of the word 'warm' to describe the sound of a valve amp, tuner, whatever, is also frequently used to describe the sound of any vintage hifi be it SS or valve. It's also a popular 'big up' often used to aid a sales pitch. My own explanation of how the term came about is more to do with what the hifi component isn't, rather than what it is. And by that I mean 'less treble'. Not that I think it's use in that context is justified, but nonetheless it's used that way.