cover the front of the plugs with wax paper and and screw temporary flat plates onto the face, bridging the disc plugs to pull them up flush with the exterior plywood surface. A few things on Google are telling me its a PA speaker, and the description there just says its 50 watts at 4 ohms. lightly screw backing plates onto the back of the discs to hold them flush with the interior surrounding cabinet plywood. Repair (if desired): Remove the cabinet door Take the same size hole saw and cut disc plugs out of same size plywood. Vintage 1970s Sunn Coliseum 320W Bass Amp Head. (2) Someone cut 3' round holes in the cabinet with a hole saw, aparantly either to unoad the cabinet tuning to relieve resonance at high volume, or making the common classic mistake of thinking that unvented cabinets need to be tuned and vented cabinets don't need to be tuned. All recordings were then broadcast from a SUNN speaker (Model 1201, Fender Musical Instruments Corporation, Scottsdale, AZ) in an open grass field at 2 m. Pensacola, Florida, 325, UNITED STATES OF AMERICA.

Sunn model 2 speakers