"I get the same sensation with Wirtz as I do Joshua Redman, Herbie Hancock, and even Coltrane.” – Music Emissions

“Indeed the skill set of the player will dictate how well your attention span can be maintained. What am I trying to say? Wirtz pulls it off flawlessly.” – Michael Mullins – Skope Mag

“Sea Level by Jon Wirtz is a brilliant collection of music.” – Cyrus Rhodes – Indie Music Digest

“He is no doubt a gifted player & composer . . . It takes talent to hold the attention span of a listener with just one instrument, Wirtz pulls this off with sheer poise.” – Markus Druery – Indieshark

“Sea Level (first record) is one amazing solo debut…” – Jeanie Straub – Colorado Music Buzz