No glue, but over time they do tend to "stick" pretty well. Don't be afraid to use a little elbow grease. You can always remove the woofer and push the amp out from the inside. Unless you have a loose speaker wire connection, you'll probably need to send the amplifier back for some TLC since there really aren't any user serviceable parts. But we'll be sure get you up and running at a very reasonable cost (should you be out of warranty).