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The BBE EQA215, EQA131 or EQA231 Graphic Equalizer. 2. The Graphic Equalizer User's manual. 3. Power cord. 4. Warranty Registration card. If any of these items are found to be missing, immediately contact the BBE dealer from whom the unit was purchased. WARNING!To prevent possible speaker or amplifier damage, always power-up peripheral devices first, wait 10 seconds, and then turn on the power amplifier. Turn off power amplifier first, then power-down peripheral devices. 1 GENERAL DESCRIPTION E