Using the Behringer ULTRAGRAPH PRO FBQ1502HD is straightforward. First, connect your audio sources to the servo - balanced inputs using the 1/4' TRS or gold - plated XLR connectors. Then, adjust the input gain controls according to the 4 - segment LED output metering to set the right audio level. You can use the 15 - band stereo graphic equalization to fine - tune the audio frequencies as needed. The FBQ Feedback Detection system can be turned on to quickly find and deal with critical frequencies. If you want to focus on the bass, use the dedicated mono subwoofer output and adjust the crossover frequency. The low - cut filter can be used to remove unwanted low - end frequencies.
When using this equalizer, make sure to use a stable power supply within the 100 - 240 V~ range. Avoid exposing it to extreme temperatures or humidity. For maintenance, keep it clean by gently wiping it with a dry cloth. If there are any technical issues, refer to the user manual or contact Behringer's customer service.