2" speakers used by many brands of hot tubs - a VERY common speaker. Priced for a single speaker without grille which can be bought separately.
3-1/2" (89mm) Poly Planar speakers used by many brands of hot tubs - a VERY common speaker. Used by : Hotsprings - Artesian - Vita - Jacuzzi - Wellis - LA Spas Priced per single speaker. These are sold by Hotsprings in a set of 4 under part number 74810 with extra cables (that you don't need if just replacing a faulty speaker - Hotsprings price is in...