Test Tone - Delco Audio System

^ 50 Hz sine - Sub woofer test
^ 500 Hz warble tone - Mid range speaker tests
^ 9k Hz spectral tone - Door tweeter test
^ Combination tone - All speakers
^ 50 Hz to 8k Hz swept sine - Speaker buzz and rattle test
^ Timed section in tape - Motor speed test
^ Instructions on tape cleaning
^ Dead Space - Noise diagnosis