Keep your Caldera spa sound system in top shape with official music system parts from Hot Tub Spa Supplies. Find speakers, subwoofers, transmitters, antennas and parts for Caldera spa music systems. All of the parts sold on this website are new and factory packaged. We offer FREE SHIPPING to the lower 48 states on orders over $299. Have questions about the right replacement parts for your spa music system? Call 914-237-5606 to speak with a customer service specialist.