While many people will be tempted to crank the shaker up, consider keeping the shaker level low. It is meant to subtly improve the listenting experience. Too much shake will ruin the effect. 

You'll probably find that you'll enjoy a lot of rumble during a heart pounding action movie but not so much during a relaxing orchestral masterpiece on your iPod.  With your level adjustments right there at your fingertips, be sure to set the shaker and bass to the appropriate setting for each experience in your i-Fi Chair.

Although we have taken every precaution to reduce the chance of long term hearing loss from the use of the i-Fi Chair, it is ultimately the responsibility of the user to listen at reasonable levels.  Prolonged use of the chair at its loudest levels may lead to permanent hearing damage.  Use caution when increasing the level and frequency of both the subwoofer and satellite speakers.

While you may be tempted to crank the knobs from side to side to find the perfect level, small changes can really have a large impact on what you hear and feel.  While tuning the sound to perfection, take small steps to increase the chances of acheiving the perfect audio levels.