- If you are truly that concerned about the precise frequency of your x-over, looking at numbers on an amplifier case and merely adjusting it by eye is not the way to do it... I don't see why it would be necessary in this case as I would run the LPF on that amp wide open as high as it goes and just use the SW x-over built into just about any respectable HU in production out there these days and be done with it, all the while having adjust-ability at your fingertips... But if you want to be precise with an amplifier's built in internal x-over you may want to look into one of these CC-1's //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gifD'Amore Engineering CC-1
