Overview Reviews Product Description Yamaha DX7 Voice ROM Cartridge VRC-107 - Special Selection “David Bristow” . This cartridge is very hard to find. Product Videos Custom Field Product Reviews Write a Review Write a Review × Yamaha Yamaha DX7 Voice ROM Cartridge VRC-107 - Special Selection “David Bristow” Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *