![]() well originally i was going to go sealed but I only have about 350 watts available. I normally set it at 1/3 octave below tuning frequency. ![]() Hope this helps you to better understand how to set your filter. An infrasonic filter is generally only used with a ported enclosure, to help prevent the sub from unloading below tuning frequency. of 3 < Prev 1 2 3 Next > GreatTone Super Member.So if you have a SUBwoofer in your vehicle, the SUBsonic filter is trying to make it just a woofer. Rumble or subsonic waves of a large amplitude are not safe for the listener and can cause heart problem if not collapsing and should be voided. To use a subsonic filter or not Discussion in 'Turntables' started by xs650shawn, Jan 30, 2014. it will attempt to quieten the notes that are below that frequency. The subsonic filter is a High Pass crossover. The truth about it now is that you can not HEAR these lower frequencies, but you CAN feel them. Or am I stuck with some type of Subsonic filter from AudioControl. I wanted to know if I took the chip completely out and left the socket open, would it totally bypass AudioControl's subsonic filter. If whatever youre playing doesnt have any frequency content below 20 Hz then the subsonic filter isnt going to have an audible effect. 'Harrison Labs FMOD Inline Crossover Pair 20 Hz High Pass RCA' from They will pass everything above 20hz, and can be. Harrison FMOD 20hz High Pass filter - US26/pair. There is a formula you can find that will help determine what size cap to use. I hate to bring up an old thread but, since my DSP (MS-8) has a subsonic filter controllable from the driver's seat. I'm not sure what or where you can get a Subsonic Filter, or a phono pre-amp that has a Subsonic filter. One was to modify the low filter on my amp to be a subsonic filter with a simple capacitor change. 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. Using the subsonic filter did allow for cleaner audible sound at higher frequencies because the amp was not producing the low frequency rumble often associated with some earlier recording and playback equipment. GreatTone Super Member 2 I used to have a lot of problems with this, and found two solutions. However, I use a Crown XLS2500W amp which does not have a subsonic filter. The only reasons to use a subsonic filter is to correct the woofers from rumbling/pumping or if youre experiencing acoustic feedback. These lower frequencies (Years Ago when the technology was invented) did waste a lot of power. The reason it is there is to stop your amplifier from wasting power on signals that you are not supposed to be able to hear. It filters out frequencies that are below audible range. I can not tell you how to set the subsonic filter, but I can give you a bit of information about it's purpose to help you understand what it does.
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