@@loveleo2006 Frequency range is determined by driver itself. DSP can help filter and flatten the frequency response, but cannot make the woofer go lower than it can.
@@fochtyu2694 The DSP can help the frequency wider. For example, Driver X can run 100db max at 30hz, but when you play music at 80db, the DSP will have a 20db headroom to boost, therefore when 80db playback the response can dive to 26hz