Thanks WAV for assuming that if I don't know the meaning of a word I must be incapable of looking it up.

Thanks Pip for explaining what I did mean to WAV.

For more clarification WAV....

So you've heard the Anglo, English and Duet systems played at folk clubs and you've decided that you like the timbre of the English Concertina? In that case, as you've obviously given it some serious thought, you should be able to explain your decision process, what you consider the difference to be between the timbre of the three systems, and what it is about the timbre of the English system that makes it stand out from the others for you.

I'm sure the Concertina players on this site are looking forward to your answer.