Hola. I am going to chime here a little bit. The Vista panels, you do not need to take the side rails apart.
Woofer replacement...l
Tools required: 6” piece of insulated wire stripped at both ends. Small Flathead Screwdriver 5/32” Allen Tool
Note: This procedure requires 2 people.
1 Turn off amp. Unplug the power cord(s). Disconnect all signal cables from the speaker. Prepare a surface with padding and blankets to protect the speaker as you work on it.
2 Inspect the work surface to assure that it is clean and free of debris. Carefully lay the Vista on its side.
3 Remove the front feet from the bottom of the cabinet.
4 Using a 5/32” Allen Tool, remove 2 screws from the stat frame bottom mounting-bracket.
5 Using a 5/32” Allen Tool, remove 2 screws from the stat frame top mounting-bracket.
NOTE: After removing these screws the stat frame is no longer connected to the cabinet. Continue to hold it in place.
Now you can take off the woofer. Usually your problem might be a cable that could touch the woofer´s cone when the cone is moving too much, as when you are feeding a test tone. I do not recommend to you to use test tones, unless you know what are you doing.
Happy listening!