I don't know the JBL line.
I'd hazard the obvious guess. You will miss some of the deep bass, but possibly enjoy a cleaner mid range and upper frequency.
Depending on the price of the 803S2 however, you might find 802 matrix or pre-matrix 801 that will blow away the JBL in all respects for same.
Live with 802 S3, 804, 805 matrix line daily....
I'd hazard the obvious guess. You will miss some of the deep bass, but possibly enjoy a cleaner mid range and upper frequency.
Depending on the price of the 803S2 however, you might find 802 matrix or pre-matrix 801 that will blow away the JBL in all respects for same.
Live with 802 S3, 804, 805 matrix line daily....