Can anybody who has a pair measure the woofer size (the woofer frame size and the surround edge-to-edge size, if you can)?
I've never seen them in person.
I've always seen them referred to as 5 1/4" woofers, but the pictures sure make them look smaller than that.
I just looked on the JBL website (
https://www.jbl.com/STUDIO+530BK.html) for them, and it refers to the 5 1/4" woofer, then goes on to contradict that by referring to their "4 inch (100 mm) ribbed polyplas woofer."
I'm pretty sure their center channel uses dual 4" woofers.
I'm guessing the woofers in the 530 are bigger than the 4" woofers used in the center but are 'rounded up' to 5 1/4".