Location of instruments in the orchestra...

I'm streaming a recording of Beethoven's Symphony No 1 in C Major.  It seems that the violin section is on the right side of the recording and the cellos and basses are on the left side.  From my experience (I have sat front row at many symphony concerts), the violin section is always on the left side and the cellos on the right (sometimes the basses are on the left, sometimes on the right).  

Do you think this is the fault of the recording or the mixing, or should I reverse my speakers?  How do you know if you have the speakers on the correct sides?  What do you think?