I have built a (toolbox) system from a car stereo and speakers...I have a 23 amp power converter running it..I built a plywood box to house everything and fully inclosed the speaker from the stereo and converter...My question is that when i crank the volume and get around # 23 the stereo starts to cut out...The stereo is putting out 50 watts max and the speakers are 400 max watts....any suggestions would be helpfull...