Subsonic Filters. there's literally no more suspension, or resistance behind the sub, to act as a spring, so the sub over-excurts, and … This filter has a very sharp cutoff character. i want a slot ported box. Obviously if i can avoid it I wont get it, but i still dont know. yea its gonna be ported. I'd be willing to bet 25hz will be fine for you, but you probably wouldn't miss much setting it to 30hz either, which would be even safer. I would recommend that you use one. The phase shift is neglegible. i see kicker says that turning on a subsonic filter will greatly increase the power handleing of … I’d like to run a ported enclosure tuned to right around 30-32hz. You must log in or register to reply here. All ported enclosures should have a subsonic filter to limit very low frequencies. A ported enclosure features vents (at the bottom of the box shown) that let air move in and out of the box to reinforce the sub's output for forceful, resonant bass. Yeah m currently using a 2.2cu sealed enclosure, and as you can imagine, it’s pretty punchy and I don’t get a whole lot down low. you are correct, below tuning in ported & bandpass designs the box has very little control over the cone movement, which can easily lead to mechanical failures if you have enough power. Title is pretty self explanatory. Liked: Likes Given: 56; Re: What is a subsonic filter? The enclosure actually has a sensitivity rating of 93.7 dB. A ported sub can safely play about half an octave below its tuned frequency before there’s a risk of damage. This is probably a dumb question, but ebay turns up this, a passive adjustable subsonic filter. The typical Tschebyscheff resonance of 0.1 dB does not cause any distortion. Yes, you will have to think about the fact that ported enclosures create less control of the woofer at frequencies lower than the tuning frequency. Cookies help us deliver our Services. (Read 24901 times) 0 Members and 1 Guest are viewing this topic. The power handling specification is calculated using a 25 Hz, 24 dB/octave subsonic filter. There may already be some subsonic roll off in your amplifier, even without a switchable filter. By using our Services or clicking I agree, you agree to our use of cookies. If you were using a sealed enclosure then one would not be needed. For The Car Audio and Video enthusiast! Hey i was wondering if i could turn off the subsonic filter on my amp without destroying the subs. With a ported box, when the sub moves forward it creates a bass note. The subsonic filter is used to remove low frequencies that you cannot hear but can rob power from the amplifier. You could be outraged at the thought of slashing subsonic frequencies if youre a real bass chief. However, all the frequencies are a multiple of five. The tuning frequency acts as a second high-pass barrier, but it does not replace the function of a subsonic filter. Without the subsonic filter, the enclosure can handle up to 150 watts RMS. Exactly. I just hooked up 3 10 inch comp vr's to my 1000 watt rms mrd-m1005, they are running at 2 ohms. The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. I just knew it would compromise my sound quality. JavaScript is disabled. When used with a ported enclosure, we always recommended turning the Infrasonic Filter on your amplifier on. Sure, that should be a foolproof (fool's way) of setting the subsonic filter. I'm pretty sure you can easily find how to do it properly. 0 Comment Report abuse Permalink ... Phono Box DC - MM/MC Phono preamp with line output - Silver. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Heads, Subs, EQs, etc... Bring it into our show room. Too many subsonic notes can still damage your subwoofer. Combine that with the purely basic frequency response of the amplifier itself and you're starting to get so low that a subsonic is almost unnecessary. Subsonic filters should be set close to the tuning frequency in order to limit the frequencies that are below the tuning of the enclosure. does anyone have any experience with these subs? Yeah I checked and it doesn’t. If they are set above the tuning frequency the ported sub will perform similarly to a sealed sub. If they are set above the tuning frequency the ported sub will perform similarly to a sealed sub. Hair & Beauty. You should stick to sealed without a subsonic unless you have a DSP that can apply a Hpf to the signal, I don't personally think it's too big of a deal if the box is tuned at 30hz it's not ideal but even if he did had one it would be set to like 20hz music almost never goes that low. You don't absoultely need one though. Sensitivity: In the features and specs section, the sensitivity is automatically rounded up to 94 dB. JojoD818. Tip, it doesn't involve a secret formula or a rule of thumb, nor do you even need to know the exact tuning of the box. when using subs in a vented box, you do want a subsonic filter, otherwise the subs will try to reproduce frequencies below the ports' tuned frequency, which is often 35-45Hz, and well above the lowest frequency the subs can hit (particularly since boxes are usually tuned above the Fs of the sub) and if the subs do … 6 people found this helpful. the box is tuned at 30 hz and the subs only have half their rated power going to them. I'm thinking of adding a subsonic filter to my ported sub and remove the frequencies below the tuned port (doing this is supposed to stop any chuffing/cone bottoming out) Any decent makes & links? Reviewed in the United States on October 6, 2018. Would I have to port the box … This is called “unloading” and this can damage the suspension of the woofer due to excessive cone travel. Tbone, the JBL amp has it's own low-pass filter built into the amp. As a purist, I was astounded at the results of the subsonic filter setting. Please refer to the links below for basic starting information. Press question mark to learn the rest of the keyboard shortcuts. It is basically a high-pass x-over for the sub - to get rid of the low low bass that the ported system is not really good at playing. Subsonic Filters. ok since the amplifier does not have a subsonic filter the amp is going to take a hell of a beating. Yo. also should the subsonic filter … My set up is a pioneer gm-dx871 with a kicker CVX 15 that I have wired in 1 ohm. I really should have gone with a different amp. If your sub will handle lower then 30hz, set the filter to 15 and you should be good, if not, or you can't hear anything below 30, set it there. Title is pretty self explanatory. i have two 900w 12s and the specs say build a box 2.5ft^3 tuned at 45hz up to 4ft^3 tuned at 35hz. I would just like to hear from experience what size and tuning sounds best but is still really loud. New ported enclosure do I need subsonic filter. by Pro-Ject. This was often an issue when LP was the dominant source, but was a much lesser problem with sealed box (infinite baffle) speakers. its set at 30 hz, and it cant be changed, only turned off. Sometimes is fun, but by and large I don’t crank the subwoofer. It's just noise, and it can lead to IM distortion, and it over-works the amp. It has a cutoff frequency of 18 Hz. A subsonic filter is a feature that decreases the severity of notes at lower frequencies. Subsonic filters should be set close to the tuning frequency in order to limit the frequencies that are below the tuning of the enclosure. Many people run ported off of JBL 1200.1's without subsonic filters. I listen to primarily EDM and other music with synth bass. It depends primarily on one thing to adapt your filter subsonic to, whether your subwoofer is mounted in a ported or sealed enclosure. Helpful. Oh well, I’ll just build a bigger sealed box and hope for the best. once the subs unload, it's just like playing them with no box at all. There is no sonic information below 15 Hz on an LP. Many people run ported off of JBL 1200.1's without subsonic filters. Check your amp specs, some amps have a built in non-adjustable one like a kicker amp i just installed. Trade Count: PinoyDVD Legend; Posts: 14,557; Bring it on! Menu About Us; Environ Facials; Monthly Offer; Services; Opening Hours Our goal? Would it be better to build two seperate boxes or one big box? In some cases, the filter has a fixed center frequency between 25-30 Hz. Subsonic filters are good for keeping the wattage of the amp powering the frequencies you want powered, and not wasting power trying to reproduce very low frequencies. I don’t like the subwoofer to over power the rest of the music all the time. Basically what a subsonic filter does is cuts out all the frequencies below the filter setting. In other cases, the Infrasonic Filter Frequency may be variable. Yeah m currently using a 2.2cu sealed enclosure, and as you can imagine, it’s pretty punchy and I don’t get a whole lot down low. Frequencies blow 10 Hz are attenuated by more than 35 dB. If my amplifier has no subsonic filter, should I not use a ported enclosure? To make you feel fantastic! 3.0 out of 5 stars No subsonic filter. 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. That means the safest setting for its subsonic filter is half an octave below whatever frequency the port … you sure as sh*t will blow the subs running in a ported box with no subsonic filter. ... SHOULD HAVE) a subsonic filter if you run ported designs that are tuned above 30hz in cars. You don't absoultely need one though. They are geared towards ported enclosures. For a better experience, please enable JavaScript in your browser before proceeding. Box Frequency , Subsonic Filter , and Low Pass Filter. My set up is a pioneer gm-dx871 with a kicker CVX 15 that I have wired in 1 ohm. Subsonic Filter - I have done a few searches on here but i didnt find what i was looking for. Just because there's no knob or switch for it doesn't mean the amp doesn't have one at all. Ported boxes are great for people who want to get lots of low-frequency output. I'm told to go with a ported enclosure, you'll benefit from a subsonic filter. Looks like you're using new Reddit on an old browser. I’m having a ported enclosure made for a 10 alpine type r, it’s going to be tuned around 34 hz. A subsonic filter is basically a high pass filter for very low frequencies. The subsonic filter is actually an active Tschebyscheff high pass filter of the fifth order. I currently am using a alpine mrv 500 watt amp, it has no subsonic filter, however, I’m also running a lc2i line output converter which has a frequency response >33hz. What you want to do to help the woofer system out in this case is use a subsonic filter in the amp or before the amp. that may not be the setting you need but wouldn't hurt to make sure yours doesnt have one thats close to whats recommended for the vented box. A subsonic filter is basically a high pass filter for very low frequencies. Now that ported speakers predominate, so do digital sources, which don’t produce unwanted subsonics. New comments cannot be posted and votes cannot be cast. If the remote plug is loose then simply the amp will not turn on. Im gonna have two Resonant Engineering SE 12s, in 2 cubes per sub after displacement ported tuned to 33hz. its had a built in 25hz subsonic filter. When this is the case, you would simply turn the filter on. Well I don’t listen at full volume ever either. Verified Purchase. Below the tuning frequency of the enclosure, there is no acoustic suspension for the woofer and it will perform like an infinite baffle. Secondly, a 30Hz tune would put a rule-of-thumb subsonic setting of 22.5Hz. Author Topic: What is a subsonic filter? So for example if I set the filter to 25 hz then the subs will not play lower than 25 hz. Watch out for speaker pumping on ported speaker setups, no subsonic filter with this. Q&A, Advice, Tips, tricks and tech welcome!
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