According to a listing from US music expert Drew McManus salary gulf for US orchestra CEOs goes on.

Big Bucks for orchestra CEOs
Big Bucks for US orchestra CEOs

As ‘Top 10 Earners’ (2011/12) are reported the CEOs from:

Los Angeles Philharmonic: $1,751,039
New York Philharmonic: $912,858
San Francisco Symphony: $638,857
Boston Symphony: $622,938
Minnesota Orchestra: $619,313
Philadelphia Orchestra: $610,446
Cleveland Orchestra: $584,498
Chicago Symphony: $577,189
Saint Louis Symphony: $419,625
Atlanta Symphony: $406,747

The average income was about $265,297. The lowest salary: CEO of Portland Symphony: $87,593.