Test your speakers with these test tone wav files. Wav files are more accurate at very high frequencies. Some Browsers may not have a plug-in for these files.

Below are three sound sequences with three notes per octave in this order.

1. Middle Six Octaves: 80-5000 cycles per second, 19 notes, up then down

2. High Two Octaves: 5000-16,000 cycles per second, 6 notes, up then down, twice

3. Low Two Octaves: 80-20 cycles per second, 7 notes, down then up, twice

Listen for changes in level from note to note indicating an uneven frequency response. The middle notes should sound fairly even in loudness. Most people cannot hear the highest note. If you can hear the first 4 high notes, your hearing and your tweeters go up to 10KHz; 5 notes - 12KHz, 6 notes - 16KHz. With most subwoofers, the lowest notes will be inaudible. If you can hear the first 4 low notes, your sub goes down to 40 Hz; 5 notes - 30 Hz, 6 notes - 25 Hz, 7 notes - 20 Hz. Do not turn up the volume of the low sequence because that could burn out your woofer!