Lots of power wasted to boot! MacBookPro -> RAAT/Air -> WiFi -> PLC -> Ethernet -> Devialet 220pro with Core Infinity (upgraded from 120) -> AperturA Armonia, Roon->HQPlayer->McIntosh C47->McIntosh MC301s>Transparent Super->Wilson Audio Sabrinas w/ Shunyata Denali, Rega RP8, Rega Apheta 2, Devialet D-Premier, Expert 120/200/250, Expert 140/220/250 Pro. A high-pass filter is usually modeled as a linear time-invariant system.It is sometimes called a low-cut filter or bass … thought it was the box but when i turned the filter way down the subs came alive. For example if you are listening to some Fall out Boy or something without a ton of bass you are still going to have … In other cases, the Infrasonic Filter Frequency may be variable. I don't quite get this function.   Your previous content has been restored. For subwoofers, it is set in the area of 50-80 Hz depending on the type of design (closed box, phase inverter, etc.) Upload or insert images from URL. Eduardo, A subsonic filter becomes necessary when a subwoofer and enclosure, usually the ported kind, resonate and play certain low frequencies much louder than the rest, wasting energy trying to play notes no one can hear. then started having problems with amp......do others use them up or way down. Unfortunately, the subsonic filter has tended to disappear from integrated amps, as a cost-savings measure. Can anyone here model what the roll off on a 24dB/octave subsonic filter, set at 36hz, will look like? SPL competitors usually don't use a subsonic filter cause they are burping a specific test tone and don't need to filter out lower freq's, and this allows the amp to make more power all together cause it's not cutting off a band of freq's. Why add processing to the signal if it's processing that you don't need? If you do get a subsonic filter, set it at about 3-5hz below your tuning frequency . Krakin's Home Dipole Project My Family- Lowered trucks/cars, Car Audio, Fast Bikes! I have a car amplifier with a subsonic filter and the manual says it will roll off at 24dB starting at 36hz. Having tested it with a 30Hz tone where the effect of the subsonic filter is obvious, I can tell you that when it says 'Bass On' it means the the filter is off and when if says 'Bass Off' it means the the filter is on, therefore 30Hz tone gets attenuated. 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 the particular record or the low frequency driver being displaced well out of its linear range by subsonic energy. The Subsonic will not allow the frequencies below where you set it to pass through. It responded politely to my consecutive presses (on/off) with another white LED. If whatever you're playing doesn't have any frequency content below 20 Hz then the subsonic filter isn't going to have an audible effect. learn something new everyday, so boils down to this daily driver leave it on, doing comps turn it off right? So I decided to search the Internet and found your write-up … Instead of wasting power on those freq's that aren't even going to be loud anyway you turn on the subsonic and it keeps the amp from playing those particular freq's and it saves you power for the actual peaks in the song. basically, if you tune the box higher, and/or you will gain some spl, but excursion increases below the roll-off. Sobsonic should be set somewhere between 20-30Hz in terms of filtering subsonic frequencies, but in fact, you should set some Highpass filter/subsonic with different rules. (29-May-2015, 13:03) Jean-Marie Wrote: Having tested it with a 30Hz tone where the effect of the subsonic filter is obvious, I can tell you that when it says 'Bass On' it means the the filter is off and when if says 'Bass Off' it means the the filter is on, therefore 30Hz tone gets attenuated. When it is in OFF position the HEX GK signal is connected directly between IN and OUT without filtering. SUBSONIC Filter ON/OFF This is the SUBSONIC filter switch. I flipped it on and off multiple times just to confirm my observations. I remember watching my woofers move in and out (large excursions) without making a sound. I remember watching my woofers move in and out (large excursions) without making a sound. The iFi-designed subsonic filter will intelligently detect whether a subsonic frequency is a warp or a bass note. The subsonic filter is used to remove low frequencies that you cannot hear but can rob power from the amplifier. 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. Turn the Low Pass Filter to the setting that allows for the most accurate sub bass sound for your system. Subsonic means slower than the velocity of sound. If you have an account, sign in now to post with your account. By You can post now and register later. Ok, so now with 8.1.x we have the new accessible menu. The Studiophono’s “Subsonic” feature was a bit less impressive. Not only can it preserve speakers from over excursion, it can allow for increased amplifier headroom. Basically what the subsonic filter does is block certian frequencies going to your subs.. sort of like a crossover. Here is the equipment that I am currently running for my subwoofers: -(2) SVS 16-46 CS-Plus passive subwoofers -(1) Crown CE1000 @ 450W/channel @ 4 ohms The Crown CE1000 has no DSP or subsonic filter and I am trying to protect my subwoofers from … This is the SUBSONIC filter switch. Subsonic filter is also a very important feature for vented enclosures. Many people run ported off of JBL 1200.1's without subsonic filters. http://www.stevemeadedesigns.com/board/topic/99528-hid-projector-headlights-and-hid-kit-look/, http://www.stevemeadedesigns.com/board/topic/100286-24s-with-tires-for-sale-east-texas/, box tuning also plays a role.   Your link has been automatically embedded. Your subwoofers … A true subsonic filter may have a cutoff much lower more along the lines of 20hz. Basically what the subsonic filter does is block certian frequencies going to your subs.. sort of like a crossover. For sealed box, it is not so important, but for basreflex boxes it is, because speaker excursion goes rapidly up under vent tuning frequency. Subsonic?, infrasonic?. FILTER ON/OFF SWITCH When this switch is in ON position the HEX Subsonic Filter is used. The Subsonic is now correctly set. Put a track where you 'think' tuning is and ease the volume up. it also protects the sub from bottoming out. Oct 12, 1999 Therefore, it will not affect the sound quality. The KAB Great Sound Escort RF-1 is a very fine transparent rumble filter that not only suppresses very low frequency (subsonic) energy, but also uses a unique active cancellation circuit that effectively suppresses vertical rumble too. You are correct in the presumption that subsonic filters provide a level of protection from over excursion. The subsonic filter is said to kick in around 20Hz the filter will go down 2.5 dB, and it rolls to 27 dB down once 5Hz is reached. All a subsonic filter does is saves your amp from making power at frequencies that aren't being played in your music. That's the simple answer. If you do get a subsonic filter, set it at about 3-5hz below your tuning frequency . ifi-audio.com Ver1.1 1 3 4 5 6 If this is the case, we suggest setting the frequency to 5 Hz below the tuning frequency of the ported enclosure. If you need one, you can get an aftermarket equalizer with an onboard subsonic filter, like an AudioControl EQL. 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. Can anyone here model what the roll off on a 24dB/octave subsonic filter, set at 36hz, will look like? • Slope: Select roll-off gradient of the selected filter: -12dB/-24dB per octave.   You cannot paste images directly. I assume it wouldn't be needed with the 1976 RIAA. Hi I have a Hifonics Brutus BXi 1606D amp hooked up to 2 12 inch Kicker L7's in a sealed box running at 1 ohm. Let me tell you right here that I ended up preferring the Zen Subsonic Filter to be left on. T. … × Low pass filter, also known as LPF – opposite of HPF and cuts off high frequencies, leaving the lower. I have a car amplifier with a subsonic filter and the manual says it will roll off at 24dB starting at 36hz. Paste as plain text instead, × The sweet spot for getting some pounding bass without destroying your subwoofer is between 25 Hz and 35 Hz.   Pasted as rich text. T. TomC25 Platinum Member. When this is the case, you would simply turn the filter on. Steve Meade Designs Inc. | © 2021 | A Car Audio Enthusiast Forum I chose to start with the Subsonic Filter on. 6. The Inline "Subsonic" filter you are seeking is called an "F-mod" and I think they are available online at Crutchfield. Do you really think subsonic filters are designed to cut off the frequencies that travel below the speed of sound rather than frequencies that cannot be heard by the human ear but produce inaudible rumble? When I flipped the switch I could rarely see them move much at all. Many people run ported off of JBL 1200.1's without subsonic filters. As the subsonic filter filters out some of the extreme lower frequencies it is my understanding that there should be less bass. Der Subsonic-Filter unterdrückt Geräusche, die durch Laufwerks- und/oder Tonarmresonanzen entstehen können. The idea behind the subsonic filter is to prevent amplifier robbing output or ‘woofer pumping’ caused by pesky warped records. I like the looks of the FMOD inline highpass filters, but they only come at … If you don't have that problem they you don't need the subsonic filter. This morning, I looked at my setting on the pre amp and saw a lever for On Off "Subsonic Fil". It will eliminate the warps andlet all the bass mid-range frequencies pass through untouched. Turn your subsonic filter all the way down, put a tone CD on. What does this subsonic filter do? Subsonic filter ist an: Beide Schalter „subsonic off/on“ sind gedrückt to cut off frequencies for which the subwoofer is not intended. I needed to buy a good interconnect too and I bought a 0.75m JIB Hi End Interconnect from CHT Solutions and it is a beautifully made RCA cable and sounds very good … In all reality, the filter will probably never get set this high, but it then begs the question… how high should the filter be set? Does anybody know where I can find a subsonic filter that rolls off between 15 and 20 htz. The filter is not adjustable, just an on/off switch. Thanks! × I'm looking perferably for something that comes before the amp to reduce wasted power output. The subsonic filter is an answer to a problem. When I flipped the switch I could rarely see them move much at all. 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). there are also some theories on the back pressure in some boxes of low hz notes that screw up the sub. The problem with these subsonic frequencies is they can cause a sub to shoot the gap if played at a high volume, so the filter is there to allow people to blast the system at higher volume with less chance of doing damage. Turn it on in a ported box -off in sealed box. and i would only leave it off for burping. Second, infrasonic filters are there to protect and are typically set around half an octave below the tuning frequency. Clear editor. However, I do not think that you need a "Subsonic" filter for 35 hz, natural rolloff below 34 hz will occur naturally, and you are really looking to cancel all higher frequencies (90+) from your subs. 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. Agreed. Team Sundown Audio, Team XS Power, 2 time NSPL Car 3601-Up Champion, 2 time NSPL Car Hardcore ChampionHighest NSPL Scores to date:154.3db on the dash sealed at 46hz, 156.2db in the kick at 46hz155.2db unofficial on dash at 43hz, what about in bass songs like bass i love you.. theres a couple of really low notes in it that it wouldnt play until i turned it way down, i believe he is referring to every day music, like actual songs that play on the radio that you have on cds and stuff, not stuff you download thats strictly for bass, I just realized Steve has reach Voldemort status, over on JP's site he is the one who will not be named....."We dont speak his name over here, fearing it will destroy us" LOL not even in hush tones. INPUT JACK The buffered INPUT jack allows you to connect any audio source and mix it with the pin 7 (GK GTR) signal. A subsonic filter is the car audio equivalent of a warning label on bleach that says "Don't drink this" :laugh: The iFi-designed subsonic filter will intelligently detect whether a subsonic frequency is a warp or a bass note. So when I look at the display and press the button: does 'bass: on' mean the subsonic filter is on or off? The amount of attenuation for each frequency depends on the filter design. The Infrasonic Filter can also be useful in sealed subwoofer enclosure applications. Subsonics can take a lot of amplifier power that is largely wasted. The filter is not adjustable, just an on/off switch. Team Sundown Audio, Team XS Power, 2 time NSPL Car 3601-Up Champion, 2 time NSPL Car Hardcore Champion, Steve Meade Designs Inc. | © 2021 | A Car Audio Enthusiast Forum. Turn your Subsonic Filter down to 10Hz then slowly turn up the filter frequency until you hear it take effect on your sub bass. A subsonic filter will attenuate frequencies so low that your subwoofer cannot reproduce them OR that humans are incapable of hearing. doubleD, I set mine ~30hz with my wall tuned to 38hz. if you happen to build the enclosure so that it does have a sub-sonic excursion rise, then you use the filter. Like the LPF, this setting is intended to ‘filter out’ frequencies that which the driver – in this case a subwoofer – cannot play and/or will harm the driver if it does so. And I need to turn off subsonic filter because I have a sealed subwoofer box but my amp wont let me turn it off it will only let me adjust it from 15 to 50Hz so what should I do to turn it off or what should I set it to with the system I have? C'mon, you can't be serious! I don't think there is really any music down that low anyway. Just based on a flat frequency response, showing only the rolloff itself? Low Pass and Subsonic Filters • Filter ON/OFF Button: Enable or disable the selected filter. 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). If the speaker is moving a LOT then you are playing below tuning, bump up a track. I have also suggested to them that they add an indication (either as a new info page accessible from a long press of a button or as an icon on the main display) for the features like ICM, Subsonic, DPM etc.... otherwise it becomes hard to remember what combination you are listening to. For example, the CA Azur 640P has a switchable subsonic filter, but the 540P omits it. Therefore, it will not affect the sound quality. On both MM and MC, the gain can be increased by 5, 10 or 12 dB, matching the output of your other sources, the V10 even has a Subsonic Filter to remove unwanted low frequency noise. • Frequency (Hz): Adjust cut-off frequency of the selected filter. It will eliminate the warps and let all the bass and mid-range frequencies pass through untouched. Just based on a flat frequency response, showing only the rolloff itself? you don't need to run a subsonic filter, if you tune your box correctly. that goes for both sealed and vented. This setting is … Not sure if this a bug or by design. they started playing shit so low that i had shit flexing like never before. bassrace/driveby leave it on. Below tuning there is no acoustic protection from over excursion. If the sealed enclosure is the appropriate volume, you do … Worse still, they are not included in all phono amps. If your amplifier has limited power output this can be a large benefit. 5. 5-Band Parametric Equalizer March 12, 2009 in Amplifiers, had an amp that powered subs pretty hard but wouldnt really hit the low stuff like 20hrtz an below. i believe most people have it set to around 10 hz below tuning frequency. For example if you are listening to some Fall out Boy or something without a ton of bass you are still going to have frequencies in the 20hz range during the song. The Filter ON/OFF switch turns the hex subsonic filters on/off: Filters -Six 4-pole Butterworth High-Pass Filters operating at 50,75 and 100Hz well i have 4_18'' in a box much like meades with 200sq inch port.. treo subs an amps. The only other button on the preamp is labeled "Subsonic Filter" and is documented by iFi as an "Intelligent Subsonic filter." Within that band, it’ll vary depending on your chosen music and the rest of your setup. And at the end of the night, when the listening session takes you way past bedtime and you forget to turn off the V10, the adjustable auto standby function does that for you. Display as a link instead, × What I experience however, with the subsonic filter setting is a greater sense of power from my amp, more PRAT, an enhanced mid-range, greater bass articulation, greater decay, greater 3 dimensionality, lower noise floor, and a more liquid, musical presentation with a noticeable increase of detail and clarity. When it says Subsonic On, I assume that mean the subsonic filter is on? This means a subsonic filter at 50 Hz would be 24 decibels down in amplifier output at 25 Hz, subwoofer box and vehicle transfer function notwithstanding. you can build the box so that it does not happen. A high-pass filter (HPF) is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuates signals with frequencies lower than the cutoff frequency. so you can "blow up" your 1000W speaker with … Perhaps the cheapest solution is just to buy an add-on subsonic filter. 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. SUBSONIC Filter ON/OFF. Interesting subsonic filter is defaulted on for Phono input. Subsonic?, infrasonic?. All DD M Series and DM Series Monoblocks use 24dB/octave subsonic filters. The unit in my system goes between the phono stage and the pre amp [out from the phono stage to filter and then filter out to the in on the amp] and your amp being integrated won't matter at all. When the speaker is moving the least amount that is where the port is doing all of the work and is where it is tuned to. All a subsonic filter does is saves your amp from making power at frequencies that aren't being played in your music. Powered by Invision Community.