In-the-day, Radio Shack stocked my giant woofers, the only WeBach speakers that ever went out since the 70s, now Amazon can send you replacements.
Velcro off the front
Unscrew the woofers
Unplug the wires
Plug wires back onto new speakers
Screw back onto wood
Front sticks back onto velcro
Maybe yours is more like a difficult dashboard?
Deciphering tools below = Why I Draw pictures for a living
http://pages.suddenlink.net/tgivaughn/