I wanted to send back the earphones again. But then I have again brought up the Earadapter size M and was totally surprised. Now the small earphones sound almost like a full-grown high-end headphones closed: Alive and thereby totally balanced! The bass is strong but not overemphasized at neutral sound setting, clear voices and precise highs. Quite even classical or jazz suitable.
So very important: choose the right ear adapters, you absolutely must sit tight in the ear canal. This develops thereby slight feeling of pressure in the ear you quickly forget because of the phenomenal sound. The included small bag with spring-clip, as known by key holders or wallets, is also very convenient. Price (34.48) and delivery (free within two days) top of Amazon.