Premium quality marine-grade, waterproof topside speaker for spas, by Milennia Sound Systems. These full-range speakers are designed specifically for hot tubs. Excellent for spa speaker replacements (including the replacement of broken pop-up speakers) as well as new stereo installations. Also great for use with boat stereos, as motorcycle speakers, ATV, outdoor audio systems, or anywhere waterproof speakers with great sound are needed. These stereo speakers are so easy to install! Requires 3" mounting hole, and at least 3-7/8" clearance. 3" hole saw may be used for cutout. 1-5/8" depth. Set of (2) speakers.