You have seen (and perhaps tried), Robotic collision sensors are crash protection devices that detect a crash before or during a collision. When simply playing records, I use my Sansui AU-517 integrated amps subsonic 16hz filter always. 20-30Hz high pass. For the LP I would play with that crossover a little, most think that the you should just set it to 80 Hz and leave it. A subsonic filter is a component on your subwoofer that reduces the intensity of notes which come through at lower frequencies. That will be a pretty boomy system. March 2017 Ideal power. If it is set to 30 Hz. October 2015 The next step is knowing how to make your high-pass filter work for you. Electrodynamic "On a long enough timeline, the survival rate of everyone drops to zero." We recommend this setting for larger rooms. The typical Tschebyscheff resonance of 0.1 dB does not cause any distortion. October 2012 The difference in distance in this example is 1 meter. My new ones should be better. of no electrical". I've been using Audacity to create an annotated MP3 collection from my old vinyl and have been living with these subsonic artifacts, worse in some LPs than others. September 2015 A collision, Turbidity is considered a good measure of the quality of water as it is a measurement of how. 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.. Somewhere from 50hz to 65hz is likely where you are going to want your crossover set. Just make sure to set the xover on the deck before you turn the xover on the amp to the highest Hz. 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. 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. 4. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Hi I first like to say great article you wrote! The value you filter against needs to be the Property Name, not the database column name. I got a couple of anticollision car door warning lights! February 2015 How to set a subsonic filter on a subwoofer? Check the level of each sub independently by turning off all of the other subs not under test. # New armtube incorporating bi-metalic technology to reduce resonance and increase rigidity. Featured Image Credit: slightly_different, Pixabay, What do you get when you pit one top-tier blender against another? What Is a Subsonic Filter & Why Should You Care? Subsonic The button on the right side of a front panel turns on and off subsonic filter. It is adjustable 6dB/Oct or 12dB/Oct. 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. Can you name them? 3-way speaker systems. All rights reserved. Possible settings are 40, 43, 50, 53, 60 and 63dB. Necessary cookies are absolutely essential for the website to function properly. Over the years, he has developed a keen interest in a wide variety of DIY projects around the home. Mhycoal 3 yr. ago You should stick to sealed without a subsonic unless you have a DSP that can apply a Hpf to the signal Therefore, to get your subsonic filter setting, take your subwoofers tuned frequency and multiply it by 0.75. 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. Since the Hz setting on the subsonic filter is the start of a slope, not a cutoff, we want to set it higher than 20 Hz. (are you certain the box is tuned to 30 hz?). It is easy to set all you need are test tones and a multi-meter. Thats a great way to find that balance we talked about above. can I use this circuit to generate a tremolo effect? I'm down at 60 Hz and found that with the music that I listen to it sounds much better. The Subsonic filter slope means at which rate the frequencies should be tapering off, from the frequency point chosen. A subsonic filter will introduce phase shift at audio bandwidth frequencies, but I'm never sure which is worse; the phase shift at low frequencies that might not exist on My Sansui integrated had a "subsonic filter" which was labeled 14Hz, so I am used to calling it subsonic (and the OP called it a subsonic filter in the title). Your one stop shop for all Trailblazer Suspension/Wheels. This website uses cookies to improve your experience while you navigate through the website. 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). The subsonic filter is actually an active Tschebyscheff high pass filter of the fifth order. Check the level of each sub independently by turning off all of the other subs not under test. What can you say? WebThe subsonic filter is used to protect your subwoofer from damage due to playing low and loud. January 2015 June 2016 (anthem arc) But I think I can only set the high pass as low as 20hz thus loosing anything below that.. Hi. The typical Tschebyscheff resonance of 0.1 dB does not cause any distortion. 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 A subsonic filter is a component on your subwoofer that reduces the intensity of notes which come through at lower frequencies. But opting out of some of these cookies may affect your browsing experience. Thanks for the replys. The push button turns on and off subsonic filter . We recommend this setting for smaller rooms and/or to get a faster, more musical and punchy sounding bass. 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. Tbone, the JBL amp has it's own low-pass filter built into the amp. It also has a balance control knob which is uncommon for a phono preamp. Set it and listen. It decreases the amplitude of those low notes you feel more than you hear. This discussion. Since its tuned at 20hz will that act as a subsonic filter for 10 to 15hz or not at all? What should my subsonic be set at? We recommend you try the factory setting first. Slowly turn the bass boost until a distortion appears then dial it back to a clear sound. That is, whatever you set it at; only frequencies above that setting go through. You can do all of this from your deck too. Plenty of genres never get anywhere near the 50 Hz range. My avr has very advanced room correction. That means the safest setting for its subsonic filter is half an octave below whatever frequency the port is tuned to. The proper way to level match your subs is to use the internal pink noise generator of your processor and an SPL meter set for slow response "C-weighted". The frequencies below the crossover are sent to the subwoofer. What is this? December 2015 April 2017 March 2019 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. 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. Update Privacy Preferences Sign up to newsletter and stay in touch with us, Copyright 2015-2023 Arendal Sound - All rights reserved, 5% Ambassador refund for existing Ambassadors. Michael MiguestJames LuongJohn WheelerJean NantaisKevin Barrett, March 2023 So it's so hard to tell if it's better. Support the12volt.com Back to Top bullseye753 Copper - Posts: 61 Joined: May 27, 2008 Location: North Carolina, United States When using bass-boost chance to burn subwoofer rises as clipping occurs much earlier. When you buy via links on our site, we may earn an affiliate commission at no cost to you. and I guess I don't run my sub hard enough because on "bass I love you" which goes down to 10hz I believe it doesn't move that much more than at 20hz. For Home Cinema use, where an AVR is used we recommend LPF Bypass On. Frequencies blow 10 Hz are attenuated by more than 35 dB. These warps can produce frequencies well below 20Hz and can introduce distortion into your playback system. 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. You are using an out of date browser. It's not at all clear to me what you are talking about? March 2012 I understand that high end gear might contain a subsonic filter option etc.. its a high pass filter for your subwoofers. and I have a light on my amp that turns red when clipping and if that happens I turn the gain down. 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 For a better experience, please enable JavaScript in your browser before proceeding. Edit. There are many DIY sub builders on the forum and they sometimes install a subsonic filter before the amplifier if they want to cut out certain low frequencies from the driver. You'll find everything you want to know about car audio and get installation help, tips and great deals on your car stereo projects. If it's sealed, turn the subsonic all the way down to 20. For visual learners, the video below illustrates how low frequencies can distort a subwoofers cone alignment without a filter. 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. This filter has a very sharp cutoff character. Adjustable from 0 to 50ms in 0.25ms increments. Thanks for the responses, I guess I'll continue doing it by ear then. Bass boost source: boobland.club Bass boost increases the volume at a certain frequency, usually at 40-45 Hz. Too many subsonic notes can still damage your subwoofer. EQ1 Gives a flat ground plane response to under 20 Hz, which will give great emphasis on the deepest bass in-room. I was told 25-30 Hz but I am not totally sure. "On a long enough timeline, the survival rate of everyone drops to zero.". Put on your favorite song and turn the volume up to your normal listening level. August 2015 You must log in or register to reply here. It is very important that the capacitors C1, C2, C4, C5 and C7 are of exactly the same values in both channels. February 2014 Wouldnt a sealed box INCREASE the power handling??? Since you are tuned to 35hz, you can set the filter around 30hz to 35hz. January 2023 August 2014 Check out the MTX Audio THUNDER1000.1 Thunder Series Car Amplifier for a great amp with a subsonic filter. Verify the level equidistant for each sub. To remove this unwanted low frequencies, subsonic filters like the circuit featured here is used. All contents are Copyright 2023 by AspenCore, Inc. All Rights Reserved. Your approach to adjusting your subsonic filter depends most heavily on whether your subwoofer is set in a sealed or ported enclosure. 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. Not even close! Any difference could cause noticeable phase shift in the output signal. For stereo users you may leave this setting Off, so you can adjust the Low Pass Filter under the next step. It has very extensive dsp options and probably cheaper than selling your qsc amp and buying an inuke. There are many DIY sub builders on the forum and they sometimes install a subsonic filter before the amplifier if they want to cut out certain low frequencies from the driver. If it's sealed it can be opened up, low. Do it in the avr when I do, but it's rare I need more (or less). Phase adjusting above will shift somewhat with frequency. Any help on this is greately appreciated. My remaining question is should I leave this setting on while either listening to CD's or watching TV/movies? First the subsonic filter. (To learn more about frequencies and how they work, check out our Beginners Guide to Frequency Ranges.). Pro tip; Have a friend/wife/mom help adjusting the phase while you sit in your listening position. I listen to vinyl on a Technics 1710 turntable. In off mode the amplifier has an Right, or play tones lower and lower and when it unloads As only frequencies How do you adjust a subsonic filter? Well, with the box being not quite the right size for the driver, that's most likely why it never sounds quite right. That could help explain the disparity. I also have a vintage McIntosh 2200 amplifier which is a 20hz to 20kHz amp. http://www.klippel.de/download/Nonlin/Klippel_nonlinearity_poster.jpg, Advanced Forum Stats, Paid Registrations by. I restore older LPs with Audacity, ClickRepair, and my Mitsubishi LT-22 with an AudioTechnica cartridge. 100-120Hz high pass. If I set it to flat, (fine for sealed) then it will not apply a filter and the sub could over drive when lower than tuning frequency. Adjustable from 0-180 degrees. Cheers! I never run my sub very hard with movies otherwise the bass overpowers everything! PFM Subsonic Filter: The Epicenter Concert Series utilizes a PFM (Programmable Frequency Match) filter which will help with speaker control and amplifier power management. The blue LED above the button is illuminated when its on. Adding the subsonic filter will ensure the subwoofer has less excursion in the deepest bass, and typically when filtering away some of the deepest bass it will sound even tighter. 2. There was a lot of drone in that 60-80 Hz range. 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 JavaScript is disabled. Weve already mentioned that the main mechanic these subsonic filters use is attenuation. Now, it gets a little more complicated. I keep them off if in a sealed Pioneer 880PRS~boston comps/alpine coax on Kappa 4 Z~back to Alpine mrd-m500 v12 on pyle 15s IB. This happens independent of the applied recording medium. Learn more. You're not going to blow up your car playing below tuning. Just don't be reckless with it. SSF @ 25hz is fine. 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. Its the opposite of a low-pass filter, which only attenuates signals above a certain line. The best way I've found to set a SSF is to generate a sweep from 45 down to 10hz, about 60 seconds long, turn the subsonic up, then let that sweep 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. It's not always necessary but it really depends on the enclosure, subs, power, and what you listen to. In off mode the amplifier has an internal subsonic filter at 10 Hz to prevent instabilities in the power supply. First, you will need to AN ELITE CAFEMEDIA LIFESTYLE PUBLISHER. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The trick is to find the right balance; it should be loud enough that you can feel the bass but attenuated enough that its not destroying your amp. Copy Comment URL. bad contacts- main source of miracles in electricity. Turn the Low For a better experience, please enable JavaScript in your browser before proceeding. 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. The tuning frequency acts as a second high-pass barrier, but it does not replace the function of a subsonic filter. For the crossover. May 2014 What high end receivers are you talking about with a subsonic filter? This power and flexibility is accessible via PC-GUI software and our innovative single-knob LCD control panel. November 2013 Resolution was greatly improved with excellent transparency. 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. 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. June 2015 Webfactory setting will suit you fine. If you have an amplifier, preamplifier, subwoofer, or any other unit with a subsonic filter, and you want to use it in a way that wont destroy it prematurely, you need to know what your subsonic filter is and how to adjust it. Meters / Speed of sound (343 m/s in room temperature) * 1000 = time in ms. So if you have a SUBwoofer in your These cookies do not store any personal information. 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. Ok I have the new 10w6v3 in jl audios ported square box and it fkn pounds but I just need to figure out how to set the sub to get best output. Instead, the number you set the filter to represents the frequency at which it starts to reduce the intensity of the sound. to match the cutoff frequency and damping of any acoustic-suspension speaker and to set the bass boost and net damping. Doing this will enable you to If 30hz seems too low, you can bring it up some. WebSetting computer to higher frequency (352,8kHz or 384kHz) deactivate S/PDIF Out and allows to record in DSD128 format. Magnepan, A SUBSONIC FILTER ISHIGHLY RECOMMENDEDIF YOU SPIN VINYL, USE PORTED SPEAKERS, AND WANT THE VERYBEST PERFORMANCE FROM YOUR ANALOG FRONT-END. Especially on some ported subs. For a better experience, please enable JavaScript in your browser before proceeding. Is using the subsonic filter a must? Your favorite music genres will push the limits of the low end. Example: 2 subwoofers in the same room, one subwoofer is placed 4 meters away from the listening position, and the other is placed 3 meters away. Report Comment. These cookies track visitors across websites and collect information to provide customized ads. June 2017 The sweet spot for getting some pounding bass without destroying your subwoofer is between 25 Hz and 35 Hz. Setting the record level . Subsonic notes sound awesome, but they damage your hardware when they get out of control. its an older pioneer AVR and yes it has a room eq setup feature with a mic. You are correct in the presumption that subsonic filters provide a level of protection from over excursion. I flipped it on and off multiple times just to confirm my observations. Hi. 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. Use a browser on any computer to play music and movies. WebInstall the Subsonic server app where you keep your media. I never do anything close to that with my sub because I don't want to blow it. The hertz scale is logarithmic. If you have one we missed, let us know in the comments! It will unload under tuning and xmax. It Thanks for reading, and as always, feel free to sound off in the comments below. The phase shift is neglegible. With my IB subs I run 15Hz SS, it hits 20 just fine but I do have to EQ it up with these subs. A ported sub can safely play about half an octave below its tuned frequency before theres a risk of damage. The low pass can start anywhere above the low pass frequency of the This feature inverts the signal, which means the same as 180 degrees phase, however, this is true 180 degrees at all frequencies. 1,773 posts. Thanks for your advise on this topic. I rarely touch sub levels. Come join the discussion about capacitors, amplifiers, subwoofers, marine and automotive audio, troubleshooting, and more! As a very general rule of thumb, I usually set an infrasonic filter 1/3 octave below tuning frequency. I also recommend putting a jumper in the subsonic filter rows. So in this case the closest setting will be 3ms. Bowers & Wilkins speaker stands for FPM 6 speakers maybe others, Arendal Sound 1723 1S & 1V Subwoofer Review. For movies this can be especially appealing. Our Q&A covers all the big questions you might have about subsonic filters. In connecting the subsonic fiter, remove the decoupling capacitor from the end module to avoid distorting the signal. However, you might be the kind of audiophile whos more into hard numbers, or you may want a hint on where to start. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. You can also buy, sell, or trade your car audio gear with other forum members in our popular classifieds. A subsonic filter is mostly used in low frequency technology. Subsonic Filter & Balance This preamp has a subsonic filter which can help make older records with more noise sound better. Not only will your low-frequency sound be less distorted, but your expensive subs will also last much longer. You can set the subsonic filter on your 1723 Series Subwoofers in the Crossover Menu and for the 1961 Subwoofers in the Setup Menu. Show more Show February 2013 Use WinISD to help you make proper sub and amp selections according to your listening tastes. Web20 Hz subsonic filter. Think of the filter as a slope, not an on-off switch., Subsonic Filters are particularly important if you spin vinyl records as they can have possible warping that causes a phenomenon known as woofer pumping. February 2017 The Fora platform includes forum software by XenForo. You're setting levels entirely by ear ? A forum for all things Trailblazer SS including mileage, horsepower, transmissions, interior mods, tires and more! Owner Stereo Integrity Co-owner Obsidian Car Audio Associate Sundown Audio The Low Pass Frequency is adjustable from 30 Hz to 160 Hz in 1 Hz increments. Join the community today and get started. Or is there at least a subsonic limit to the LFE channel bandwidth? A 20Hz high-pass filter (subsonic filter) can be switched in from the front panel to eliminate unwanted subsonics. As for the subsonic filter, Ive tried both settings and cant hear a difference. 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. We recommend leaving the phase at 0 degrees when using an AV-Receiver/Processor with time alignment (speaker distance) feature. Your subsonic filter should be set at 30.12hz, which is the max free air response of the driver. WebSetting subsonic filter Tech Support I have a 12-in ported subwoofer box, the box is tuned to 31.7. So, if you already set the subsonic filter frequency to 20Hz, then setting the slope to 12dB/Oct will ensure that the signal has 12dB lower output at one octave under 20Hz (one octave below 20Hz is 10Hz). If there was such a receiver with this subsonic filter built in they would be using it. In your case your filter goes to 35 so that's what you use. 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". Let the user decide what sounds best to them. I have mine inside of my phono stage which is a project audio tubebox ds. OK, so if the port tuning frequency is 40Hz then your subsonic should be set to 40Hz which is pretty high. 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. December 2013 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. February 2016 It may not display this or other websites correctly. 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. This helps avoid bad distortion since they cant handle deep bass. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Subsonic its the same high-pass filter (HPF) on the sub amplifiers (often on monoblocks) cuts off infrasound. WebTurn your Subsonic Filter down to 10Hz then slowly turn up the filter frequency until you hear it take effect on your sub bass. The best thing to do is have the sub have a range of frequency response curves to choose from, like SVS's Ultra subs or Hsu's subs. 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. They have adjustable crossovers that can be selected for various speakers. As a very general rule of thumb, I usually set an infrasonic filter 1/3 octave below tuning frequency. They're right- the answer is No. The number chosen here means the frequencies above will be filtered away to avoid high tones coming from your subwoofer nobody wants to hear Diana Kralls voice through the subwoofer anyways. This category only includes cookies that ensures basic functionalities and security features of the website. September 2012 You using an avr? Yet its not a topic amp owners can blow off. The subsonic filter is actually an active Tschebyscheff high pass filter of the fifth order. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. That's the simple answer. (frequency always indicated by corresponding LEDs). April 2015 basically, if you tune the box higher, and/or you will gain some spl, but excursion increases below the roll-off. Its the opposite of a low-pass filter, which only attenuates signals above a certain line. What would you do with a Qi wireless charger? April 2012 Not a 3" round port. August 2020 A sub sonic is for when your playing loud below tuning it helps keep the sub under control and not over extend or hit the back plate. April 2016 Subsonic . Are you using any kind of EQ on it or have you at least taken any sweeps of it in your room? Then adjust it back up until the bass notes tighten up again. Some people own amps with subsonic filter buttons that they never turn off for fear of breaking something. The subsonic filter is actually an active Tschebyscheff high pass filter of the fifth order. You set it just under where the mid bass speakers pick up. Verify the level equidistant for each sub. Turn your Subsonic Filter down to 10Hz Therefore, to get your subsonic filter setting, take your subwoofers tuned frequency and multiply it by 0.75. December 2018 November 2014 Since this is fairly limited to an artifact associated with vinyl playback, is there any value to having this setting On while listening to digital playback? Very common crossover frequency. Seriously considering the mindsp but I have a concern. December 2016 WebBasically, with the subsonic off, play a 27 Hz test tone, measure the AC output voltage, multiply that number by .707, and then turn the knob up until the voltage hits that target. Each octave up is twice as many Hz as the previous one, and dividing any frequency by 2 takes it one octave lower. 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). So I decided to search the Internet and found your write-up confirming my experience. I feel like with it on it gives a little less clarity and affects the highs a little less air,space. It is adjustable from 6dB/Oct to 24dB/Oct with 6dB increments. I will definitely take a look at the Nyquist shelf filter. February 2023 I'd love to", "I2C is a multi-address bus man. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. # Low friction, completely stable dual pivot bearing design for vertical movement. Great advice with the test tone. February 2012, All The current consumption is aound 5 mA. Weve now covered the purpose of a subsonic filter and how it works. It decreases the amplitude of those low notes that you feel more than you hear. Technical & Advanced Car Audio Discussion. July 2012 While filtering is important, this isnt necessarily a dealbreaker; it all depends on what kind of music you listen to. I cant find the SL100B Transistor, Selectable subsonic filter settings, that will filter away the deepest frequencies. 3kHz to 3.5KHz. 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.

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