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My 10W6's are going to be celebrating their 9th birthday in 2004, they've been in a very large 32hz ported environment for most of their life now, and I've never had the need for a subsonic filter. 'need' is such a strong word ) for a subsonic filter. Extract regex filter now supports groups and multiple results/matches. Added 'Edit then Watch' button for editing a watch before watching. Email notification plaintext improvements. spart Leistungsreserven für den optimalen Frequenzbereich des Subwoofers. Receive a notification when your filters no longer resolve to anything in the HTML. Rather than nearly twice the pressure forces inside the box compared to a sealed box, you end up with literally none, if you go too far, and it's really easy to bottom out a sub essentially free-air like that. So funktioniert ein Subsonic-Filter: Schneidet die Frequenzen (HP) unterhalb 20-30Hz für den Subwoofer ab. However, as you travel away from the tuning frequency in either direction, they become less and less 'in phase', eventually you'll get to the point where the sub again might as well not even be in an enclosure.Īt low frequencies, this is bad, because the sub literally behaves like it's not in a box at all. In reality, it's never going to be a perfect phase alignment, but your 'tuning frequency' is the frequency where, if played, the cone and energy escaping out the port are going to be as close to 'in phase' with each other as they can get, so they combine constructively rather than cancel out. it's just about in time for the cone to move out again and compress the air in front of the cone again. Now, the reason why you need a subsonic filter on a ported box is because once the sub starts playing frequencies too far below the tuning frequency of the box, you run the risk of 'unloading' the sub (laymens terms the box loses control over the subs movement), which could and generally will result in mechanical damage to the subwoofer. so that by the time a pulse of compressed air travels out of it, say. but they are delayed by that static amount of time. For example, if the Subsonic Filter is set to 30 Hz, only frequencies above 30 Hz will be passed. so the pressure fluctuations inside the enclosure can travel through this port. The Subsonic Filter will block frequencies below its set level. The port is a tube with a known air mass and resistance. it simply contains and destroys that rear wave energy, so it can't escape to cancel out the front wave energy. Hence the need for a box.Ī sealed box is like a garbage disposal. If it weren't for your enclosure, the pressure would bleed into the vacuum, and you'd get almost no sound. and decompresses the air behind the cone. The cone moves out, and compresses the air in front of the cone. When a sub moves in and out, the signal generated off the front of the cone are 180 degrees out of phase with the signal off the rear of the cone.

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None of it matters in the scope of 'just be careful, and listen for your sub's limits, and set the subsonic based on those.' :cool:īear in mind, the port is simply a delay device, essentially. Download and use 600+ Subsonic Filter stock photos for free. 10hz below is probably a better rule of thumb, but there are some influencing factors.

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It's a win-win situation for the amp, the driver and my sanity.You don't need to set it right at the tuning frequency. This will also keep me from wasting precious amp power trying to reproduce anything below (practically useless anyways), which translates into less energy consumption and less heat = amp longevity. In either case, it would seem that filtering this before the signal hits the amp stage is going to not only be better, but easier on the wallet.

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I'm farther ahead whether I build my own pre-amp filter or use something like a Behringer Ultragain Pro MIC2200 ($100). After seeing the values needed for a 35Hz filter and trying to find inductors and caps that are even close to what I'd need, the cost would be non-beneficial. But I was thinking it would be cheaper to design a post-amp filter as opposed to pre-amp. Passive crossovers aren't exactly known to be efficient. I do agree that it's best to put the filter on the pre side of things as opposed to post-amp. While xlim is really more of the concern, it's better safe than sorry. Modeling for my cab shows this driver will reach xmax at 31.59Hz with a 400 watt signal. It is quite possible to send subharmonics through the cab with an ill placed slap or pop. KAB RF1 Subsonic Filter is a very fine transparent rumble filter that not only suppresses very low frequency (subsonic) energy, but also uses a unique. Click to expand.Well for 1, synth may very well find it's way to this cab.

Subsonic filter