I have two original Bose 301 series II speaker brown Grill Covers. Both are in excellent condition as shown and ready for your next Bose project.
Bose 301 Series ll Left Right Cabinets No Speakers Vintage
Used in VG condition Bose 301 Series ll Left Right Cabinets No Speakers. I cannot say if the crossover works without speakers. Tweeter wires were cut at the mount & will need to be replaced.