I've been subscribing to the Berlin Philharmonic's Digital Concert Hall for a few years now. If you're unsure about classical music and have only heard the cliche pieces like Beethoven 9 and Vivaldi's Four Seasons, I invite you to check it out. They currently have 280 concerts you can stream at any time, however many times you like.
Having gone to a music conservatory, I can safely say that their quality of playing is rarely matched and the recording quality is nothing to sneeze at.
There are many devices that will stream it but I simply use my laptop and a DAC.
Let me know what y'all think! They have many sample videos on Youtube as well.
The Berliner Philharmoniker's Digital Concert Hall