Peavey® 112-C - Tweed 1x12 Guitar Cabinet No matter how good your amp is, the speaker cabinet must also be top quality to have a great tone. The Peavey 112-C has 18mm plywood construction and a premium Celestion Vintage 30 speaker. The back of the cabinet is convertible for changing the cabinet to an open back configuration. Rubber feet and metal corners complete the package. Great quality, great look, great tone and great value!