Are you looking for the cut off point for your main amp? The 2Wq comes with a variable crossover (WX-2) that goes between the amp and preamp with a selector switch. Once the desired sound is achieved the box is removed and replaced with a plug in resistor at the back of your amp. This relieves the main amp and speaker of low frequencies. Without the WX-2 your only other option is to try different resistors. These are high quality resistors with male and female RCA's.
I hope this helps.
I hope this helps.