I am building a couple of Volt 10LX with the ported flat pack. I know the specs say they go down to 45hz, does that mean I can safely set the crossover at 50hz? I am running a music only system, and need to use these VOLTS due to placement limitations. I will be running them with a Crown XLI1500, and am really looking for some mid bass chest slam. I have 2 Ultimax 18s running sealed with an Inuke 6000DSP for the sub bass.