Alexander Hanna is one of today’s leading bassists whose inspiring musicianship has been described as “outrageously talented” (Chicago Tribune). He was appointed Principal Bass of the Chicago Symphony Orchestra by Riccardo Muti in 2012. Prior to his Chicago appointment he served as Principal Bass of the Detroit Symphony Orchestra for four years.

Hanna has appeared as concerto soloist with the Chicago Symphony Orchestra performing Bottesini’s Concerto No. 2 in 2022 with Riccardo Muti, Mazzoli’s Dark with Excessive Bright in 2021 with Edwin Outwater, and Vanhal’s Concerto in 2015 with James Conlon. He has also appeared as concerto soloist with the Bellingham Music Festival Orchestra. Chamber music collaborations include Yo-Yo Ma and Mitsuko Uchida, among many others.

A dedicated teacher, Hanna teaches for the Sphinx Organization, Chicago Musical Pathways, DePaul University, The Civic Orchestra of Chicago, Carnegie Hall’s National Youth Orchestras, and the Pacific Music Festival (Sapporo, Japan).

Internationally acclaimed artist, Harold Hall Robinson played his last official concert as Principal Bass with The Philadelphia Orchestra in September of 2022.  Prior to this, Mr. Robinson spent ten seasons as principal bassist of the National Symphony Orchestra, eight seasons as associate principal of the Houston Symphony Orchestra and three seasons as principal of the New Mexico Symphony Orchestra.  A prize winner at the 1982 Isle of Man Solo competition, Mr. Robinson has performed concertos with The Philadelphia Orchestra, the National Symphony, Houston Symphony, New York Philharmonic, the Rhode Island Philharmonic, American Chamber Orchestra, and the Greenville South Carolina Orchestra. In addition, Mr. Robinson is known for his outstanding recitals and masterclasses throughout the United States. Mr. Robinson is currently on the faculty of Curtis Institute and Juilliard.

Scott Pingel has been the principal bass of the San Francisco Symphony since 2004. He has appeared numerous times with the Chamber Music Society of Lincoln Center and at the Music@Menlo and Music in the Vineyards festivals. Versatile in a variety of styles, Pingel has performed in jazz clubs from New York to Stockholm, and his solo work with the iconic heavy metal band, Metallica, was seen by millions worldwide and hailed as "show stopping" by Rolling Stone. He has taught masterclasses throughout North America, Asia, and Europe and was among the first bassists selected to teach for Tonebase, the preeminent online music learning platform. He has served as a tenured Associate Professor at the University of Michigan and is currently a faculty member of the San Francisco Conservatory of Music. His former students have won prestigious international solo competitions and gained employment with major symphony orchestras and conservatories.