Other features are delay, phase and crossover functions. If you are running lower power, this can be lower in frequency as there is less power available to push the cone so hard.Ī good option is the Mini DSP, it has the filters you need and parametric EQ to get the subs smooth. Generally speaking, you usualy could get away with the high pass filter at 15Hz.maybe 14Hz depending on the steepness of the filter etc. If you are running at say 300 watts and not hitting Xmax, then you can go lower until you do at a really low frequency. If you hit Xmax at 500 watts in the passband, say 30Hz then it gets critical below tuning. When you model your subwoofer in the computer program, does your sub hit Xmax with the power you are inputing? If so, look at the Xmax below the ported frequency then input filters at different frequencies to see how low you can go before exceeding Xmax. Please let me know if any more information is required to be able to properly assist me. Note that I live in Canada so if there are stores that ship FROM Canada, please suggest those to me as it would likely save me a lot on shipping. However, this seems way too complicated for me, requiring multiple parts and whatnot. These FMODs have caught my eye, but I was told to go the Project 99 route. This is why I made this thread: I am looking for suggestions on a subsonic filter to protect my SDX12 subwoofer drivers in ported enclosures. However, I use a Crown XLS2500W amp which does not have a subsonic filter. To prevent damage to my drivers from now on, I have been told a subsonic filter was necessary. I have ordered a replacement driver since one of mine has started to rattle. More details about them can be found in this thread I posted a little while ago, if needed: I have a pair of SDX12 subwoofers in ported enclosures that I built myself.
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