#Subsonic filter diy professional

Otherwise I could conceivably blow out my woofers. I would only use it on a truly terrible warp or outrageous rumble that is on the disk.īut it is nice to know I have it with all that horsepower laying around. The bass gets clean as a whistle but everything sounds very closed in when it is in the circuit. The filter sucks all the separation out off the signal and makes it sound like mono in the bass.Īnd it completely alters the tone of the set. I can't remember using my subsonic filter at any time during the last year. Low-pass filters will allow frequencies below a pre-determined cutoff frequency. First, you will need to determine the type of subsonic filter to be used, such as low-pass, band-pass, or high-pass.

#Subsonic filter diy professional

I'm not bragging on hot air-I am a professional installation guy and retired after 40 years in the trenches.Īnd the table feet are then floated again on their own silicon pads for TOTAL isolation from vibration at ANY volume my main system can put out (measured 105dB on 'All Along the Watchtower by Hendrix'). Setting 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. It is so quiet you think the record is really a CD. Records are normally dead quiet on the quiet passages-zero rumble, hiss and just a tiny bit of groove scrape. It tests +-3dB down to the low 20s in room using test microphone at listening position. We highly recommend you consider one of these amplifiers to power a ported subwoofer system or if you intend to make a sealed subwoofer system more efficient.I have a KAB subsonic filter on my far field system that can be switched in or out of my tape monitor loop when I need it.Īnd dual 15 inch Velodynes under those for truly deep bass. However, by ensuring the amplifier’s power and the subwoofer’s excursion are within the range of audible frequency, the Infrasonic Filter will reduce distortion and make the sealed subwoofer much more efficient.īelow is a list of JL Audio amplifiers that have the Infrasonic Filter feature. If the sealed enclosure is the appropriate volume, you do not have the possibility of a port unloading at low frequencies. The Infrasonic Filter can also be useful in sealed subwoofer enclosure applications. If this is the case, we suggest setting the frequency to 5 Hz below the tuning frequency of the ported enclosure. In other cases, the Infrasonic Filter Frequency may be variable. When this is the case, you would simply turn the filter on. In some cases, the filter has a fixed center frequency between 25-30 Hz. When used with a ported enclosure, we always recommended turning the Infrasonic Filter on your amplifier on. 1 I never run my sub very hard with movies otherwise the bass overpowers everything I have a TC Sounds LMS- Ultra 5400 18' subwoofer in a 7.3ft 3 ported enclosure after all displacements. By turning on the Infrasonic Filter, you prevent these inaudible, lower frequencies from being reproduced, thus avoiding the unloading of air that could cause harm to your subwoofer.

As the unloading occurs, this puts the subwoofer at serious risk of bottoming out.

When this happens, the column of air inside the port begins to unload and acts as if it were a giant hole in the enclosure. This is especially helpful in ported applications because the lower you go below the tuning frequency of the enclosure, the less the enclosure can control the subwoofer’s excursion. In ported enclosure applications, this feature allows for frequencies below the tuning frequency of the enclosure to be blocked. As you can probably imagine, this can be a very useful feature for your amplifier to have.

It is not recommended for use in DJ, pro-sound, or other high-duty-cycle applications. What is it? What is its purpose? This article was designed to answer these very questions.īy definition, the term “infrasonic” refers to “frequencies below audible range.” This means that an Infrasonic Filter is designed to filter out the frequencies below the audible range of human hearing. INSTALLATION: The SA1000 is designed to provide high fidelity subwoofer amplification and is tailored for home audio, home theater, and studio environments. We are often asked about the Infrasonic Filter feature on many of our amplifiers.