e_merritt

hey everyone i have an artiesian spa 840L and im having problems with the stereo does anyone know where the amp is in the tub because if i just run wires from the stereo to the patio speakers they work but not if i run them thru the wires that are in the tub so there has to be an amp somewhere and just wondering if anyone here can help me troubleshoot this problem or tell me where i can find the help i need thanks!!!