subsonic filter

[phillipcyoung 10+ year member]

talked to a guy at my local car audio shop and he told me to make sure i got an amplifier with a subsonic filter. What is it and what does it do?

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[Louisiana_CRX 5,000+ posts]

It is like a high pass filter for ultra low bass that is basically below hearing...usually only necessary on ported enclousures because of tuning freq that is boosted...//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[phillipcyoung 10+ year member]

can you dumb that down for me a little more plz? im new at this. lol

 

[Max_Power 10+ year member]

It cuts out the ultra low freq. usually below 30hz It prevents your subwoofer from unloading, and causing mechanical damage.

 

[mike dressure 10+ year member]

when you use a ported enclosure with tremendous power, it can cause damage below the tuning frequency in which you chose to tune to! mostly below 30 hz, thus causing mechanical failure due to over excursion. so the subsonic filter will play a big role in keeping your subwoofer from over excurting due to a full signal from an extreme amount of power. this is called unloading. so if using a sealed enclosure i wouldnt worry about it to much because at that moment it wouldnt be as useful as it would in a ported application. so to put it in simple term's ported is a must, not ported the sub wont bust lol