Jacob Kol Joind the trio in 1975 . Born in Germany and immigrated to Israel as a little boy, Jacob started his musical way on the saxophone. He played in the Israeli Air Force band and several other bands. When the Adler Trio needed a bass harmonica player to replace the former one, Dror Adler convinced Jacob, his friend, to try the heavy bass harmonica. Jacob was hooked immediately and is playing it ever since.