Each octave up is twice as many Hz as the previous one, and dividing any frequency by 2 takes it one octave lower. I wasn't able to find frequency response specs for these, but starting your low pass filter at 80hz is a good place to start. Subsonic its the same high-pass filter (HPF) on the sub amplifiers (often on monoblocks) cuts off infrasound. October 2014 So, if you already set the LPF frequency to 100Hz, then setting the LPF Slope to 12dB/Oct will ensure that the signal has 12dB lower output at one octave above 100Hz (one octave above 100Hz is 200Hz). July 2012 June 2015 The only thing you do need to know before we move on is that attenuation doesnt completely dampen sounds of a certain frequency. # Highest grade materials used throughout. October 2013 3 modes for sealed subwoofers, 6 modes for vented subwoofers as they can be used in vented or sealed mode. The subsonic filter dampens all frequencies below where you set it so as not to unload your subs if you play a frequency below the port tuning. Pioneer 880PRS~boston comps/alpine coax on Kappa 4 Z~back to Alpine mrd-m500 v12 on pyle 15s IB. Setting your subsonic filter correctly eliminates the excursion demands on the subwoofer (s) below tuning and could provide you with years more service from your system. Setting the record level . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Thanks for the responses, I guess I'll continue doing it by ear then. Owner Stereo Integrity Co-owner Obsidian Car Audio Associate Sundown Audio Right, or play tones lower and lower and when it unloads Message User. For a better experience, please enable JavaScript in your browser before proceeding. A subsonic filter is mostly used in low frequency technology. August 2012 Edit. So you want to delay the signal to the closest subwoofer by 1 meter (1 / 343 * 1000 = 2,915 ms). Turn the Low Wouldnt a sealed box INCREASE the power handling??? Copyright 2023 House Grail. January 2019 You are using an out of date browser. Check the level of each sub independently by turning off all of the other subs not under test. That will be a pretty boomy system. Or is there at least a subsonic limit to the LFE channel bandwidth? February 2023 can I use this circuit to generate a tremolo effect? You should set the filter at 20Hz, you can set it a tad higher, like 22-25, if you would like. April 2014 You must log in or register to reply here. The push button turns on and off subsonic filter . Let the user decide what sounds best to them. We recommend leaving the phase at 0 degrees when using an AV-Receiver/Processor with time alignment (speaker distance) feature. April 2016 So if im tuned to 33hz, I set my SF to 25hz? Great info by the way!! Setting the Subsonic Filter and Bass Boots. Low subsonic frequencies, especially 20 Hz and below, damage the structure, so we want to attenuate them as much as we can. (To learn more about frequencies and how they work, check out our Beginners Guide to Frequency Ranges.). A 20Hz high-pass filter (subsonic filter) can be switched in from the front panel to eliminate unwanted subsonics. March 2014 4. September 2014 I will definitely take a look at the Nyquist shelf filter. February 2014 Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. It's not at all clear to me what you are talking about? The hertz scale is logarithmic. This website uses cookies to improve your experience while you navigate through the website. 2-way speaker systems. But now have a new car, this will take a while to figure out. and a low pass for the other 7 speakers at 80hz. Anything above 80hz makes the subwoofer easy to locate in the soundstage and you don't want that. According to the description, it, While learning about different types of vibration sensors for condition monitoring, I came across a cheap piezoelectric shock/tap/vibration, What is the point of reviewing a cheap timer module, especially if it is based on the ubiquitous, The Raspberry Pi Pico W is a microcontroller development platform that combines the RP2040 with a Wi-Fi controller, Wireless battery charging is showing up everywhere. June 2012 Report Comment. Your subsonic filter should be set at 30.12hz, which is the max free air response of the driver. WebSetting up a subsonic filter requires you to determine the type of filter being used, the frequencies that need to be filtered, and the power rating. I cant find the SL100B Transistor, Ideal power. 2. As for the subsonic filter, Ive tried both settings and cant hear a difference. I tend to spend more time up front getting it where I think it is good, by testing like you do, with a variety of music and movies and adjust for probably a few weeks until I get something that suits my needs. April 2012 Then adjust it back up until the bass notes tighten up again. Originally a subsonic filter was designed to catch recording errors and frequencies below 20hz hence "subsonic" that could possibly damage your subs. Is it possible it affects the highs. A subsonic filter is a component on your subwoofer that reduces the intensity of notes which come through at lower frequencies. EQ3 One octave above the EQ1 setting, so for example if on EQ1 the subwoofer has a +-3dB point of 16Hz, the EQ3 setting will have a +-3dB point of 32Hz. Since its tuned at 20hz will that act as a subsonic filter for 10 to 15hz or not at all? noooooo wayyyy. this has never been discussed on this forum ever. some good info for those who dont know i guess and who cant search. Most amplifiers have a 12 dB crossover slope on the LPF, so if you set the LPF higher, you will get punchy bass and it will hit very hard, but if you keep it at 60-80 Hz you will get smoother lower more pleasant bass. Keep an eye on the subs to make sure they aren't bottoming out a d just keep playing with it until you find a setting you like best. December 2019 You using an avr? If it's ported you set it 1/2 octave below the boxes tuning. In other words, its what we know as a high-pass filter: a filter that lets through signals above a certain Hz threshold and attenuates any signal below that threshold. The typical Tschebyscheff resonance of 0.1 dB does not cause any distortion. Webfactory setting will suit you fine. If you set an 18 db/oct ss filter to 40 hz, then at 20 hz it will be 18 db quieter, the 24 db/oct would be 24 db quieter. The Fora platform includes forum software by XenForo. July 2016 This filter has a very sharp cutoff character. After listening to a few songs I realized that it wasn't getting as low as it should considering my box is tuned to 30Hz and my xover is set to 100Hz so I turned down the SS filter a little more and it sounded alot better. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIYs, product reviews, accessories, classifieds, and more! its about time someone does a write up on this. thanks op.. sticky it, still waiting on sticky. now plz o wait, doign a noob thing here and e Because of the 50db gain high output MC setting, the dial on the front for variable resistance loading is disabled and it defaults to 47Kohm, which is fine for the Denon. bad contacts- main source of miracles in electricity. Analytical cookies are used to understand how visitors interact with the website. December 2017 20-30Hz high pass. Seriously considering the mindsp but I have a concern. This discussion. OK, so if the port tuning frequency is 40Hz then your subsonic should be set to 40Hz which is pretty high. Tis sub has a 7.3ft3 box made of 1" MDF tuned @ 20Hz with a slot port that is 16" wide 3" tall x 39". 4. We absolutely love the feeling of low notes thudding through our whole bodies, but we love something else just as much: not having to replace our subwoofers once a month. Home Trials WebSetting computer to higher frequency (352,8kHz or 384kHz) deactivate S/PDIF Out and allows to record in DSD128 format. when I run a movie I have to find the right setting because every movie sounds different. I just finished up with the rebuild of my system (see sig) last weekend and when I was setting the dials on my sub amp before powering it up I set my subsonic filter to what I thought was around 20Hz. (are you certain the box is tuned to 30 hz?). 1,773 posts. Set the LPF at 60-80 Hz. I have a totally restored Nikko Alpha II amp and a Nikko Beta 20 Pre Amp. Hey everyone, Been a long time since I ran some sweeps of the system, last time was to check the seat to seat uniformity I achieved with multiple subs. The best thing to do is listen. It has a cutoff frequency of 18 Hz. Thats where all the bone-shaking, window-rattling fun is! The sub moves just a little at times and that when I put the system at MAX. Not only will your low-frequency sound be less distorted, but your expensive subs will also last much longer. On ported speaker enclosures, you must tune the port to its optimal frequency. Think of the filter as a slope, not an on-off switch. # Low friction, completely stable dual pivot bearing design for vertical movement. For a better experience, please enable JavaScript in your browser before proceeding. Receive exclusive offers and promotions. Subsonic . By clicking Accept All, you consent to the use of ALL the cookies. If you dont like to crank your volume up that far, you might never notice any difference in subsonic sounds. We also use third-party cookies that help us analyze and understand how you use this website. I actually go into the movie if its an action movie and set the bass to match some explosions and then watch the movie so I don't have to change it during the movie. AN ELITE CAFEMEDIA LIFESTYLE PUBLISHER. SEE ALSO: Read our reviews of the best car amplifiers for bass this year, MTX Audio THUNDER1000.1 Thunder Series Car Amplifier, Skar Audio Single 8" 300W Dual 2 Ohm Loaded Sealed Subwoofer Enclosure | IX-1X8D2, 6 DIY Garden Arbor Plans You Can Make Today (With Pictures), How to Install a Pendant Light 12 Easy Tips, 6 Companion Plants for Fruit Trees (With Pictures), Ix Series 8-Inch Dual 2-ohm loaded Subwoofer Enclosure, Peak Power: 300 watts | RMS Power: 150 watts, Subwoofer comes pre-wired and loaded in enclosure. I also recommend putting a jumper in the subsonic filter rows. March 2019 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 JavaScript is disabled. If your components will play lower efficiently then you can go lower than 80. Set it to about 20 Hz. Verify the level equidistant for each sub. All of HPF settings will very on how good your subs suspension is, some can play a mean free air and some will bump the backplate, lol. MY TURNTABLE is a thorens td 125 fully modded pretty quiet but I still believe not 100% sure that the subsonic filter degrades my sound a little. Explaining that is beyond the scope of this Q&A, but if youre just now learning, you should tune your subs, and this video is a great explainer. If it's a ported box, set the subsonic about 5hZ below the tuning frequency. You're not going to blow up your car playing below tuning. Just don't be reckless with it. SSF @ 25hz is fine. I had my 6-channel amp's opamp and power supply upgraded to better quality parts / grades. Each octave up is twice as many Hz as the previous one, and dividing any frequency by 2 takes it one octave lower. Slowly turn the bass boost until a distortion appears then dial it back to a clear sound. Therefore, to get your subsonic filter setting, take your subwoofers tuned frequency and multiply it by 0.75. In off mode the amplifier has an What can you say? Bowers & Wilkins LCR 60 S3 Speaker with Kevlar woofers. Where this gets to be a bit more murky is in finding the best combinations of 1)number of ports plugged 2)room size setting 3)subsonic filter setting and 4)SPL for a given room. The Fora platform includes forum software by XenForo. Typically, EQ2 setting will sound faster than EQ1 as it has a lack of output in the deepest bass which will give the bass a heavier sound to it. These cookies do not store any personal information. The Low Pass Frequency Slope means at which rate the frequencies should be tapering off, from the LPF Frequency point chosen. The beat way is to do exactly what you are doing. August 2014 As a very general rule of thumb, I usually set an infrasonic filter 1/3 octave below tuning frequency. This power and flexibility is accessible via PC-GUI software and our innovative single-knob LCD control panel. It decreases the amplitude of those low notes you feel more than you hear. Yes, every single recording is different, but adjusting to each film should still not be necessary (I agree that it isn't perfect all the time). Most subs have a filter built into the plate amp to protect the driver from damage from super low frequencies that it can't produce. Feb 26, 2011. Very common crossover frequency. Subsonic The button on the right side of a front panel turns on and off subsonic filter. 07-25-2005 at 10:34am. that goes for both sealed and vented. I don't have it turned up loud enough to ruin my sub even at 10hz so I am not worried about that just wondering what the lower bass notes will be like tuned at 20hz. You set it just under where the mid bass speakers pick up. A very difficult decision. This happens independent of the applied recording medium. When you buy via links on our site, we may earn an affiliate commission at no cost to you. The phase shift is neglegible. Too many deep bass thuds can tax the limits of your woofer and cause it to wear out much faster than it otherwise would. JavaScript is disabled. If 30hz seems too low, you can bring it up some. As the founder of House Grail, Pete's primary goal is to help consumers make educated decisions about DIY projects at home, in the garage, and in the garden. I usually just try to play the lowest hitting song i can find or some sine waves and turn it up as loud as i would have it then adjust it so it doesn't bottom out. If you pay attention, you will find that when it comes, The intelligent induction lamp is a cheap indoor motion sensor nightlight that comes in handy so you do, This post covers a few things about rechargeable electric arc lighters. My avr has very advanced room correction. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. I'm down at 60 Hz and found that with the music that I listen to it sounds much better. So it's so hard to tell if it's better. a power requirement! As a very general rule of thumb, I usually set an infrasonic filter 1/3 octave below tuning frequency. If you are trying to find 65hz, just start cutting things in half. Deals We recommend measuring the distance to the subwoofer furthest away and adding delay to the remaining subwoofer(s) so that their delay is equal to the difference in distance between it and the furthest away subwoofer. That's the simple answer. October 2020 I notice when I play a certain easy-listening RCA Living Stereo album that my woofers are doing a huge dance, moving in and out like crazy, where there is no real bass in the song being played. Massive output to 18hz ported vs output down to 10hz sealed but not as much output at 18hz and above. Necessary cookies are absolutely essential for the website to function properly. If youre a true bass-head, you might be incensed at the idea that youd want to cut out subsonic frequencies. For visual learners, the video below illustrates how low frequencies can distort a subwoofers cone alignment without a filter. (frequency always indicated by corresponding LEDs). I keep them off if in a sealed An electric arc lighter uses high voltage, I recently picked up a couple of microwave motion sensor radar modules. its a high pass filter for your subwoofers. 0 comments 100% Upvoted Log in or sign up to leave a comment Log In Sign Up Sort by: best no comments yet Be the first to share what you think! March 2013 I do not have mine set at the moment, and I am afraid that if I do set it I will lose my lowest notes, as my understanding of the filter is that it rolls off everything below where it is set so as not to damage the drivers in a ported box. Weve now covered the purpose of a subsonic filter and how it works. I listen to vinyl on a Technics 1710 turntable. When using bass-boost chance to burn subwoofer rises as clipping occurs much earlier. Fascinated by all sort of tools, Pete loves reading and writing about all the latest gadgets and accessories that hit the market. If either of those is true, read on, and well get just a little bit into the weeds. My sub with my port had 111db at 15Hz and 116 at 20Hz. Bass boost source: boobland.club Bass boost increases the volume at a certain frequency, usually at 40-45 Hz. My friend always says never use equilisers or add something in the chain of audio. With my IB subs I run 15Hz SS, it hits 20 just fine but I do have to EQ it up with these subs. Can you name them? You have seen (and perhaps tried), Robotic collision sensors are crash protection devices that detect a crash before or during a collision. If you are only running like 200 watts to a sub with 16+ mm of Xmax, you can probably get by with setting it a little lower - just be careful. Michael MiguestJames LuongJohn WheelerJean NantaisKevin Barrett, March 2023 I also always keep my Bass and Treble to 12:00 -Off. Subsonic covers the low end and will be set according to the subs enclosure. basically, if you tune the box higher, and/or you will gain some spl, but excursion increases below the roll-off. You can also buy, sell, or trade your car audio gear with other forum members in our popular classifieds. Adjustable from 0-180 degrees. My remaining question is should I leave this setting on while either listening to CD's or watching TV/movies? Its tuned at 20hz. WebEasy way is to leave everything hooked up, subsonic OFF, volume low, play deep bass like 28hz sine wave, turn volume up, as woofers start moving too much turn the subsonic A forum community dedicated to all mobile audio enthusiasts. "Maybe you could further investigate programming this module through its serial port. For Home Cinema use, where an AVR is used we recommend LPF Bypass On. I understand that high end gear might contain a subsonic filter option etc.. Put on your favorite song and turn the volume up to your normal listening level. April 2017 That means the safest setting for its subsonic filter is half an octave below whatever frequency the port is tuned to. If you have a ported box I would definatley keep the subsonic at 30 Hz. August 2015 January 2015 WebTurn your Subsonic Filter down to 10Hz then slowly turn up the filter frequency until you hear it take effect on your sub bass. If it is set to 30 Hz. November 2015 #4. you don't need to run a subsonic filter, if you tune your box correctly. March 2017 so I find where it sounds perfect and leave it there. My new ones should be better. Since you are tuned to 35hz, you can set the filter around 30hz to 35hz. I was told 25-30 Hz but I am not totally sure. WebComplete with multiple DSP functions including 7-band PEQ, LPF, phase, subsonic filter, limiter, delay, and HPF the SPA250DSP gives you the ultimate control to fine tune your audio system. What I wanted to say is that amps sound the same. What should my subsonic be set at? Enjoy your next ride with your newly balanced bass track! You're setting levels entirely by ear ? So, if its tuned to 40 Hz, set the filter knob to 30 Hz. so if the bass is up too high it drowns out everything else. What do you think? Not a 3" round port. That one takes some listening to get dialed in. . The subsonic filter is actually an active Tschebyscheff high pass filter of the fifth order. Tbone, the JBL amp has it's own low-pass filter built into the amp. Especially on some ported subs. of no electrical". October 2015 Regrettably, the motor is running at a constant", "What changes are required in order to feed audio instead of microphone", "Author's Note: More information about the AZDM01 turbidity sensor used in this project can be found", "i looked at some of the circuits at this site and found them to be In other words, its what we know as a high-pass filter: a filter that lets through signals above a certain Hz threshold and attenuates any signal below that threshold. Show more Show Selectable subsonic filter settings, that will filter away the deepest frequencies. Frequencies blow 10 Hz are attenuated by more than 35 dB. But if you understand how to adjust your subsonic filter and practice doing it right, you might reap some big rewards. Now Available: Tech Talk Podcast with Scott Wilkinson, Episode 19. This feature comes in handy when you have several subwoofers in the setup and want to combine them on a single output from your source so that they have the same delay. March 2022 Sign up to newsletter and stay in touch with us, Copyright 2015-2023 Arendal Sound - All rights reserved. December 2015 February 2013 His other interests include astronomy, hiking, and fishing. For the crossover. Frequencies blow 10 Hz are attenuated by more than 35 dB. If it's sealed it can be opened up, low. Now Available: Tech Talk Podcast with Scott Wilkinson, Episode 19 Click here for details. My port is 16" wide x 3" high and 39" long. It has a cutoff frequency of 18 Hz. Update Privacy Preferences Do it in the avr when I do, but it's rare I need more (or less). Where I would part company from you is considering budget constraints. August 2020 May 2015 December 2018 But not subsonic filter option. This feature inverts the signal, which means the same as 180 degrees phase, however, this is true 180 degrees at all frequencies. Bowers & Wilkins speaker stands for FPM 6 speakers maybe others, Arendal Sound 1723 1S & 1V Subwoofer Review. For music setups the phase needs to be adjusted so the subwoofer blends with the front speakers. As a result power handling decreases dramatically and excursion is uncontrolled which could result in damage to the driver, specifically physical damage as a result of over excursion at even modest power levels. I have no clue what I would like the best.. Good point the sealed could tame peaks better and room gain could get me to where I want to be.. In connecting the subsonic fiter, remove the decoupling capacitor from the end module to avoid distorting the signal. As only frequencies EQ2 Half an octave above the EQ1 setting, so for example if on EQ1 the subwoofer has a +-3dB point of 16Hz, the EQ2 setting will have a +-3dB point of 24Hz. It's at 20hz. These cookies track visitors across websites and collect information to provide customized ads. you can build the box so that it does not happen. The maximum useful frequency is 3 MHz. This category only includes cookies that ensures basic functionalities and security features of the website. If you arent sure which one you have, you can tell by looking at the box. The subsonic filter is actually an active Tschebyscheff high pass filter of the fifth order. Selectable from 12 Hz to 31 Hz. February 2012, All May 2012 It is easy to set all you need are test tones and a multi-meter. "On a long enough timeline, the survival rate of everyone drops to zero.". I have a few test LPS and when I put it on the silent groove test I can see that my 15 inch (JBL L300 Moniters) sub moves a little with my amp which is a little weird cause my amp is supposed to cut at 20hz. On the flip side, I think it's a good place to start. If you're just guessing as to what frequency to set it at. On top of that you're guessing whe May 2016 March 2012 It will unload under tuning and xmax. I think this is a large generalization as every install(box, subs, power level, design, vehicle, etc) is different. It's one of those "rule of thum Web20 Hz subsonic filter. to match the cutoff frequency and damping of any acoustic-suspension speaker and to set the bass boost and net damping. I learn something new everyday, I'm glad I asked this question because otherwise I would have never know how to actually set the ssf and whether to use it or not. My speakers have an in-room low extension -3dBs at 32 hz so I don't want to miss out on real bass reproduction. You can do all of this from your deck too. The frequencies below the crossover are sent to the subwoofer. A round port is 3" x 3". But if youre a fan of the ones that do (and you know if you are), you need a subsonic filter to keep your subwoofers from rattling themselves to bits before their time. So I decided to search the Internet and found your write-up confirming my experience. December 2016 No band-aid, a subsonic filter is essential if you're using a good subwoofer -- or your main speakers extend really low -- and you're trying to play vinyl. A forum community dedicated to home theater owners and enthusiasts. April 2015 It Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Check the level of each sub independently by turning off all of the other subs not under test. My avr has very advanced room correction. November 2012 Is using the subsonic filter a must? A subsonic filter is a component on your subwoofer that reduces the intensity of notes which come through at lower frequencies. It is adjustable 6dB/Oct or 12dB/Oct. WebSetting subsonic filter Tech Support I have a 12-in ported subwoofer box, the box is tuned to 31.7. February 2016 Somewhere from 50hz to 65hz is likely where you are going to want your crossover set. Copy Comment URL. The Low Pass Frequency is adjustable from 30 Hz to 160 Hz in 1 Hz increments. Piezoelectric Sensory Switch Module An Afterthought, Updated 555 Timer Relay Module A Quick Analysis. I don't have it turned up loud enough to ruin my sub even at 10hz so I am not worried about that just wondering what the lower bass notes will be like tuned at 20hz. Some people own amps with subsonic filter buttons that they never turn off for fear of breaking something. Learn more OK, I'm convinced Show me the demo first Usually you want the high pass filter of your components set to the same frequency as you low pass filter of your subwoofer to eliminate phasing caused by the multiple drivers attempting to recreate the same frequencies Ok so 30hz on the subsonic and then on the LP filter start at 80. In other words, its what we know as a high-pass filter: a filter that lets through signals above a certain Hz threshold and attenuates any signal below that threshold. But on low to midrange stuff like the Yamaha RX-V667, is there a subsonic filter on the sub output? # New armtube incorporating bi-metalic technology to reduce resonance and increase rigidity. Set it and listen. (Optional) Get an app for your phone. I have a TC Sounds LMS- Ultra 5400 18" subwoofer in a 7.3ft 3 ported enclosure after all displacements. I have mine inside of my phono stage which is a project audio tubebox ds. Is the hole for the speaker the only hole? Since you are tuned to 35hz, you can set the filter around 30hz to 35hz. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. A subsonic filter is a component on your subwoofer that reduces the intensity of notes which come through at lower frequencies. I flipped it on and off multiple times just to confirm my observations. CarAudio.com is the oldest and largest car audio forum community, since 2000. If not, its ported. Well, with the box being not quite the right size for the driver, that's most likely why it never sounds quite right. its an older pioneer AVR and yes it has a room eq setup feature with a mic. Doesn't sound like it if you are constantly adjusting. The Subsonic filter slope means at which rate the frequencies should be tapering off, from the frequency point chosen. For a better experience, please enable JavaScript in your browser before proceeding. You can select the subsonic filter frequency (frequency at which you want to begin filtering) and subsonic filter slope (the rate at which you want to attenuate the frequencies)., Receive exclusive offers and promotions. It can help your amp save power when the bass gets real low. You are using an out of date browser. A collision, Turbidity is considered a good measure of the quality of water as it is a measurement of how. What vehicle is this? It filters out very low frequency content that can potentially send your subs to the moon. Play some of your favorite bass-heavy tracks and adjust the filter threshold until the low notes start reverberating. 3.5kHz high pass (tweeter) & 250-500Hz high pass (midrange) Subwoofer subsonic filter. Cheers! Our Q&A covers all the big questions you might have about subsonic filters. The blue LED above the button is illuminated when its on. Feature highlights. | House Grail How to set a subsonic filter on a subwoofer? This eliminates the bizarre subsonic sine wave almost all LPs have. Great advice with the test tone. You can still turn on your subsonic even on a sealed box. So in this case the closest setting will be 3ms. 3-way speaker systems. It is very important that the capacitors C1, C2, C4, C5 and C7 are of exactly the same values in both channels. JavaScript is disabled. If your subsonic filter is set to 40 Hz or 30 Hz, notes will still get through but will be much quieter. A ported sub can safely play about half an octave below its tuned frequency before theres a risk of damage. The sweet spot for getting some pounding bass without destroying your subwoofer is between 25 Hz and 35 Hz.
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