The ES503 3-Amped Stereo System from dB Technologies is a 1000W 3-amped sound system composed by 2 slave 4 x 3" full-range tops and 1 master 12" subwoofer. The sub hosts a Digipro G3 amp module with auto-range PSU and a 3-channels mixer with Bluetooth connection. It is equipped with a three-channel mixer controlled by a DSP. The first channel features a MIC/instrument balanced/unbalanced combo connector with an adjustable anti-feedback filter, impedance compensation, and microphone gain with 3 positions (0, +10, + 20 dB). The second and third channels are LINE inputs with balanced/ unbalanced combo connector. The system is provided with several preset equalizations, and each user can create and save its own custom equalization.