It has very extensive dsp options and probably cheaper than selling your qsc amp and buying an inuke. Copy Comment URL. Our Q&A covers all the big questions you might have about subsonic filters. But if you understand how to adjust your subsonic filter and practice doing it right, you might reap some big rewards. 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. Thanks for reading, and as always, feel free to sound off in the comments below. It also has a balance control knob which is uncommon for a phono preamp. 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. I have mine set slightly lower for my sealed box. and a low pass for the other 7 speakers at 80hz. Electronic synthesization can be murderous on speakers if they Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Come join the discussion about capacitors, amplifiers, subwoofers, marine and automotive audio, troubleshooting, and more! Do it in the avr when I do, but it's rare I need more (or less). June 2013 Since its tuned at 20hz will that act as a subsonic filter for 10 to 15hz or not at all? November 2018 http://www.klippel.de/download/Nonlin/Klippel_nonlinearity_poster.jpg, Advanced Forum Stats, Paid Registrations by. April 2014 A subsonic filter is a component on your subwoofer that reduces the intensity of notes which come through at lower frequencies. My sub with my port had 111db at 15Hz and 116 at 20Hz. Then I normalize the entire album and export the tracks as AAC. 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. 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. 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. To remove this unwanted low frequencies, subsonic filters like the circuit featured here is used. Were here to help. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. January 2019 Message User. Michael MiguestJames LuongJohn WheelerJean NantaisKevin Barrett, March 2023 On/Off. Feb 26, 2011. 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. It was set to Off so I flipped it to On and the woofer, while slightly moving, was moving dramatically less than when the setting is Off. January 2013 Now Available: Tech Talk Podcast with Scott Wilkinson, Episode 19 Click here for details. (frequency always indicated by corresponding LEDs). Since its tuned at 20hz will that act as a subsonic filter for 10 to 15hz or not at all? So, if its tuned to 40 Hz, set the filter knob to 30 Hz. 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. If you're looking for extreme protection of the sub, then the higher slope (24) is better. It decreases the amplitude of those low notes that you feel more than you hear. Weve already mentioned that the main mechanic these subsonic filters use is attenuation. so I find where it sounds perfect and leave it there. What is this? Not even close! Sign up to newsletter and stay in touch with us, Copyright 2015-2023 Arendal Sound - All rights reserved, 5% Ambassador refund for existing Ambassadors. Join the community today and get started. Ill have to try and find something with a bit of a warp or wobble Cinema Room: LG 77" C1 | Xbox Series X | Zidoo Z1000 Pro | ATV 4K | Denon X4700H running Monitor Audio Silver fronts and rears, SVS PB-1000 Pro sub and Cambridge Audio Minx Min 22 A forum for all things Trailblazer SS including mileage, horsepower, transmissions, interior mods, tires and more! Fascinated by all sort of tools, Pete loves reading and writing about all the latest gadgets and accessories that hit the market. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Now, it gets a little more complicated. The difference in distance in this example is 1 meter. The subsonic filter is a High Pass crossover. 1,773 posts. It may not display this or other websites correctly. November 2012 it will attempt to quieten the notes that are below that frequency. (are you certain the box is tuned to 30 hz?). AN ELITE CAFEMEDIA LIFESTYLE PUBLISHER. Tbone, the JBL amp has it's own low-pass filter built into the amp. This filter has a very sharp cutoff character. # Highest grade materials used throughout. A 20Hz high-pass filter (subsonic filter) can be switched in from the front panel to eliminate unwanted subsonics. 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. so if the bass is up too high it drowns out everything else. Sealed enclosures work just like weve described. 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. For movies this can be especially appealing. Subsonic . Hi. May 2014 So I decided to search the Internet and found your write-up confirming my experience. When I flipped the switch I could rarely see them move much at all. We recommend this setting for smaller rooms and/or to get a faster, more musical and punchy sounding bass. They're right- the answer is No. 4. Were right there with you. So you want to delay the signal to the closest subwoofer by 1 meter (1 / 343 * 1000 = 2,915 ms). All contents are Copyright 2023 by AspenCore, Inc. All Rights Reserved. Tony. February 2023 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. It can help your amp save power when the bass gets real low. March 2022 There was a lot of drone in that 60-80 Hz range. That is, whatever you set it at; only frequencies above that setting go through. In your case the 10w6 I wouldnt go lower then 26-28hz on the test tone. 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! can I use this circuit to generate a tremolo effect? First the subsonic filter. A collision, Turbidity is considered a good measure of the quality of water as it is a measurement of how. I restore older LPs with Audacity, ClickRepair, and my Mitsubishi LT-22 with an AudioTechnica cartridge. (anthem arc) But I think I can only set the high pass as low as 20hz thus loosing anything below that.. Are you using any kind of EQ on it or have you at least taken any sweeps of it in your room? Since you are tuned to 35hz, you can set the filter around 30hz to 35hz. Seriously considering the mindsp but I have a concern. What I wanted to say is that amps sound the same. 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). 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.. Not a 3" round port. Technical & Advanced Car Audio Discussion. 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. March 2019 If the circuit is applied to a stereo unit, build an exact duplicate for the other channel. 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. 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. That will be a pretty boomy system. For the crossover. to match the cutoff frequency and damping of any acoustic-suspension speaker and to set the bass boost and net damping. The Subsonic is now correctly set. For example, If your subsonic filter is set to 40 Hz, 30 Hz notes will still get through but will be much quieter. Subsonic Filter & Balance This preamp has a subsonic filter which can help make older records with more noise sound better. December 2018 March 2016 its a high pass filter for your subwoofers. The frequencies below the crossover are sent to the subwoofer. Resolution was greatly improved with excellent transparency. 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. Great information! Would be great to get this added as a sticky or added to a sticky for those who do not search and to have the information more r 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. I adjust it because each movie has a different amount of bass so you have to set it up just right. Set it and listen. So in this case the closest setting will be 3ms. The Low Pass Frequency Slope means at which rate the frequencies should be tapering off, from the LPF Frequency point chosen. Right you will have to port it lower, watch the excursion on low notes. In off mode the amplifier has an The short answer to your question is no. That is exactly what buyers looking at the Vitamix. Bowers & Wilkins speaker stands for FPM 6 speakers maybe others, Arendal Sound 1723 1S & 1V Subwoofer Review. If it's a ported box, set the subsonic about 5hZ below the tuning frequency. It's not always necessary but it really depends on the enclosure, subs, power, and what you listen to. 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 This happens independent of the applied recording medium. I remember watching my woofers move in and out (large excursions) without making a sound. January 2016 # New armtube incorporating bi-metalic technology to reduce resonance and increase rigidity. make the port 6% longer should tune it a little lower. of no electrical". It has a cutoff frequency of 18 Hz. It is recommended to set up a very subsonic filter with a very steep slope (attention factor) to combat this issue., You can set the subsonic filter on your 1723 Series Subwoofers in the Crossover Menu and for the 1961 Subwoofers in the Setup Menu. 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). Thats where all the bone-shaking, window-rattling fun is! 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. Very common crossover frequency. The next step is knowing how to make your high-pass filter work for you. But not subsonic filter option. Great advice with the test tone. 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". VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Copyright 2023 House Grail. I listen to vinyl on a Technics 1710 turntable. I also always keep my Bass and Treble to 12:00 -Off. As a very general rule of thumb, I usually set an infrasonic filter 1/3 octave below tuning frequency. 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. http://www.realmofexcursion.com/downloads.htm, System Design: Help Me Choose Equipment For My Car. Owner Stereo Integrity Co-owner Obsidian Car Audio Associate Sundown Audio Any help on this is greately appreciated. Webedited December 2003. If it's sealed, turn the subsonic all the way down to 20. I understand that high end gear might contain a subsonic filter option etc.. My avr has very advanced room correction. Over the years, he has developed a keen interest in a wide variety of DIY projects around the home. Some bass units on the market dont have subsonic filters built in. We recommend this setting for larger rooms. WebSetting subsonic filter Tech Support I have a 12-in ported subwoofer box, the box is tuned to 31.7. CarAudio.com is the oldest and largest car audio forum community, since 2000. Check out the MTX Audio THUNDER1000.1 Thunder Series Car Amplifier for a great amp with a subsonic filter. It But on low to midrange stuff like the Yamaha RX-V667, is there a subsonic filter on the sub output? October 2020 If either of those is true, read on, and well get just a little bit into the weeds. Possible settings are 40, 43, 50, 53, 60 and 63dB. 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. 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. 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. What Is a Subsonic Filter & Why Should You Care? This category only includes cookies that ensures basic functionalities and security features of the website. A very difficult decision. This morning, I looked at my setting on the pre amp and saw a lever for On Off "Subsonic Fil". 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 Frequencies blow 10 Hz are attenuated by more than 35 dB. 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. We recommend leaving the phase at 0 degrees when using an AV-Receiver/Processor with time alignment (speaker distance) feature. July 2012 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. We also use third-party cookies that help us analyze and understand how you use this website. Then adjust it back up until the bass notes tighten up again. The Fora platform includes forum software by XenForo. Therefore, to get your subsonic filter setting, take your subwoofers tuned frequency and multiply it by 0.75. Weve now covered the purpose of a subsonic filter and how it works. Adjustable from 0 to 50ms in 0.25ms increments. If you are trying to find 65hz, just start cutting things in half. Feature highlights. Selected value is indicated by LED. It will unload under tuning and xmax. In connecting the subsonic fiter, remove the decoupling capacitor from the end module to avoid distorting the signal. July 2016 September 2012 The subsonic filter should be set slightly below the tuning frequency of the port in your box. It will also help reduce low frequency rumble and sounds from the listening environment. I had my 6-channel amp's opamp and power supply upgraded to better quality parts / grades. On ported speaker enclosures, you must tune the port to its optimal frequency. July 2014 So the question is. The SQ turned out fantastic after some burn-in. Use a browser on any computer to play music and movies. However, you may visit "Cookie Settings" to provide a controlled consent. For a better experience, please enable JavaScript in your browser before proceeding. Right, or play tones lower and lower and when it unloads VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. January 2014 My avr has very advanced room correction. This helps avoid bad distortion since they cant handle deep bass. 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. So it's so hard to tell if it's better. For stereo users you may leave this setting Off, so you can adjust the Low Pass Filter under the next step. when I run a movie I have to find the right setting because every movie sounds different. It's at 20hz. These cookies will be stored in your browser only with your consent. LPF covers the top end. His other interests include astronomy, hiking, and fishing. I don't know what to say..to me 10Hz IS subsonic. JavaScript is disabled. I wasn't able to find frequency response specs for these, but 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. 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. When simply playing records, I use my Sansui AU-517 integrated amps subsonic 16hz filter always. Show more Show JavaScript is disabled. Is using the subsonic filter a must? When you buy via links on our site, we may earn an affiliate commission at no cost to you. Your subsonic filter should be set at 30.12hz, which is the max free air response of the driver. February 2015 Or is there at least a subsonic limit to the LFE channel bandwidth? Each octave up is twice as many Hz as the previous one, and dividing any frequency by 2 takes it one octave lower. December 2019 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. Now when I use my subsonic filter my sub moves much less but!It's been 1 year I'm debating if I should use this filter because Im pretty sure my system sounds better with the filter off. As only frequencies I keep them off if in a sealed OK, so if the port tuning frequency is 40Hz then your subsonic should be set to 40Hz which is pretty high. Below tuning the enclosure "unloads" the pressure in the enclosure and it no longer acts as a spring. WebSecondly, a 30Hz tune would put a rule-of-thumb subsonic setting of 22.5Hz. I have never heard of this. geolemon. 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). The subsonic filter is actually an active Tschebyscheff high pass filter of the fifth order. They have adjustable crossovers that can be selected for various speakers. You'll find everything you want to know about car audio and get installation help, tips and great deals on your car stereo projects. 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). Slowly turn the bass boost until a distortion appears then dial it back to a clear sound. WebGain setting Buttons marked with and set gain of the amplifier. We recommend you try the factory setting first. I got a couple of anticollision car door warning lights! Pete has been working in the trades since high school, where he first developed a passion for woodworking. March 2013 For a better experience, please enable JavaScript in your browser before proceeding. Thanks for the responses, I guess I'll continue doing it by ear then. You using an avr? EQ1 Gives a flat ground plane response to under 20 Hz, which will give great emphasis on the deepest bass in-room. Too many subsonic notes can still damage your subwoofer. If On is selected, then the Low Pass Filter will be disabled. a power requirement! August 2020 Now Available: Tech Talk Podcast with Scott Wilkinson, Episode 19. Put on your favorite song and turn the volume up to your normal listening level. So if im tuned to 33hz, I set my SF to 25hz? Great info by the way!! 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. WebInstall the Subsonic server app where you keep your media. Set it and listen. and I have a light on my amp that turns red when clipping and if that happens I turn the gain down. 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. August 2014 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. Web20 Hz subsonic filter. Help with speaker placement 5.1.2 or 7.1 or ??? Set it to about 20 Hz. EDIT 2: Ah, and you dont need your woofer connected to do that 8 Reply blockrocker 3 yr. ago Yes, do this. 100-120Hz high pass. However, you might be the kind of audiophile whos more into hard numbers, or you may want a hint on where to start. If you want a little less rolloff, go with an 18 or 12db. Report Comment. September 2015 Adjustable from 0-180 degrees. I have ported speakers; Ascend Acoustics Sierra 2 EX. 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. October 2014 A round port is 3" x 3". Your one stop shop for all Trailblazer Suspension/Wheels. With all the detail weve gone into, its easy to forget that most of these changes arent audible to the human ear. These cookies track visitors across websites and collect information to provide customized ads. Play some of your favorite bass-heavy tracks and adjust the filter threshold until the low notes start reverberating. The tuning frequency acts as a second high-pass barrier, but it does not replace the function of a subsonic filter. Subsonic Filter Selectable subsonic filter settings, that will filter away the deepest frequencies. (Optional) Get an app for your phone. This filter has a very sharp cutoff character. 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 Learn more OK, I'm convinced Show me the demo first And what's your buddy's vehicle? Its the opposite of a low-pass filter, which only attenuates signals above a certain line. This website uses cookies to improve your experience while you navigate through the website. 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. Agree, I see it as over kill,beyond overkill.. and then there is the ON or OFF filter that many amps have..say, set at 28hz(Non adju The subsonic filter is actually an active Tschebyscheff high pass filter of the fifth order. Ideal power. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Note that my #4. you don't need to run a subsonic filter, if you tune your box correctly. JavaScript is disabled. Turn the Low February 2017 Thanks for your advise on this topic. December 2016 If you have one we missed, let us know in the comments! Edit. 20-30Hz high pass. October 2015 Since you are tuned to 35hz, you can set the filter around 30hz to 35hz. March 2012 Just make sure to set the xover on the deck before you turn the xover on the amp to the highest Hz. 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. I'm actually very happy with it! To be effective, a subsonic filter has to be very steep - this allows all wanted frequencies to get through, and rejects those that will only cause problems. Even among seasoned audiophiles, subsonic filters are a topic guaranteed to sow confusion. For a better experience, please enable JavaScript in your browser before proceeding. October 2013 Plenty of genres never get anywhere near the 50 Hz range. I flipped it on and off multiple times just to confirm my observations. If you have a ported box I would definatley keep the subsonic at 30 Hz. February 2014 Especially on some ported subs. November 2014 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. 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. It is easy to set all you need are test tones and a multi-meter. Magnepan, A SUBSONIC FILTER ISHIGHLY RECOMMENDEDIF YOU SPIN VINYL, USE PORTED SPEAKERS, AND WANT THE VERYBEST PERFORMANCE FROM YOUR ANALOG FRONT-END. December 2012 If it's sealed it can be opened up, low. The hertz scale is logarithmic. I have since added some more absorption to help counter a 60Hz suckout, (fiberglass batts under some end-tables) but nothing else. What should my subsonic be set at? Check the level of each sub independently by turning off all of the other subs not under test. 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". JavaScript is disabled. I setup my sub one time and have not touched it once since then (EQ'ed though). Any difference could cause noticeable phase shift in the output signal. I have mine inside of my phono stage which is a project audio tubebox ds. With my IB subs I run 15Hz SS, it hits 20 just fine but I do have to EQ it up with these subs. This filter has a very sharp cutoff character. Subsonic notes sound awesome, but they damage your hardware when they get out of control. The Fora platform includes forum software by XenForo. You might try this: lCol = objNavigation.Where It is adjustable from 6dB/Oct to 24dB/Oct with 6dB increments. that goes for both sealed and vented. 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. 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. 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. This feature inverts the signal, which means the same as 180 degrees phase, however, this is true 180 degrees at all frequencies. 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. Delete. Well, with the box being not quite the right size for the driver, that's most likely why it never sounds quite right. The Low Pass Frequency is adjustable from 30 Hz to 160 Hz in 1 Hz increments. The current consumption is aound 5 mA. It filters out very low frequency content that can potentially send your subs to the moon. You must log in or register to reply here. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. May 2016 If you dont like to crank your volume up that far, you might never notice any difference in subsonic sounds. Setting the record level . The low pass can start anywhere above the low pass frequency of the Is the hole for the speaker the only hole? I'd love to", "I2C is a multi-address bus man. March 2015 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. 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. A subsonic filter is a component on your subwoofer that reduces the intensity of notes which come through at lower frequencies. 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. The only thing you do need to know before we move on is that attenuation doesnt completely dampen sounds of a certain frequency. By clicking Accept All, you consent to the use of ALL the cookies. 4. 11. Yet its not a topic amp owners can blow off. A good point to set it is 25hz. Low subsonic frequencies, especially 20 Hz and below, damage the structure, so we want to attenuate them as much as we can.

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