Magnadyne WR42B Waterproof Marine & Hot Tub Speakers Magnadyne WR42B Waterproof Marine & Hot Tub Speakers These speakers are the same size as WR40 only with better power handling and sound quality. 65Hz-16.5kHz frequency response 6" grill diameter, 4 1/2" diameter cutout hole, 1 5/8" mounting depth Priced and sold per pair