Tariff's are misunderstood. My company assembled parts in PA based off of components made in China. 400+ jobs assembling and shipping parts. When the tariffs went in place in 2018, it was cheaper to do the assembly in Mexico. he assembled part had a lower rate than the components themselves based on the HTS codes. That immediately put plans in motion to shut down all US operations and within a year, we moved all assembly out of the country. Before the move, we added tariff charges to the majority of our customers as a separate invoice line item. The business wanted to pass on that cost.
I don't know it's the same for Conn-Selmer, but it's most likely cheaper to assemble in China, save money and pass any tariff on to the consumer.