Subsonic Filter?????

[Big-Cat 10+ year member]

i've got a XXX 12 and a JBL 1200.1. I'm gonna build a 2.7^3ft box tuned to 33hz. Now...i heard that the 1200.1 doesn't have a subsonic filter i think it is...and i believe it was wonderbread that told me that it could cause some serious damage to the sub. What can i do to solve this problem???

Click to read more...

 

[rco8786 10+ year member]

it could cause damage, but probably won't. however, be on the safe side and spend 20 bucks on a filter. lord knows who sells em tho

 

[Big-Cat 10+ year member]

but wait...if you don't know who sells them then how do you know how much they cost???

 

[dr. no 10+ year member]

I don't really know for sure and would like more info about this too but to my understanding the frequencys that could cause damage to the driver would be really low, like under 20hz. The JBL's freq. response is listed at 20-500hz ,so I wonder if it does have any output below 20hz? Also if this was really much of a concern I would think JBL would have addressed it, I mean it is a sub amp.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[Wonderbread 5,000+ posts]

its a cost cutting measure...

A SSF is only practical in a Ported or Vented box...

in a sealed box, tehre is no worry..

it stops frequencies signifgantly lower than that of which teh box is tuned for from being sent to the driver...

I wouldnt REALLY worry about it too much...

infrasonic (subsonic) filters tend to filter out most tones below 25 hz...

how many songs do YOU ahve that play 20 hz tones?

 

[Big-Cat 10+ year member]

oh, so i should basically be set...accept if i'm listening to some like bass song, which won't be too often. but how low do you think i could safely go....just incase something happens becuase i've got a bunch of files of different hz tones from 20-80, and i can compare the songs that i might want to listen to to the frequencies

 

[Wonderbread 5,000+ posts]

dont worry.

there is VIRTUALLY no mainstream music out there taht sustains sub 20 hz tones for more than a second..

and you will be hard pressed to find anyhting below 30, (today's music, not including liek Organ music or anything...)

 

[Big-Cat 10+ year member]

ok, thanks. you've helped me out a lot through out my process of building my system. i really appreciate it. by the way...my XXX comes in the mail tomorrow

 

[bean 10+ year member]

You guys are right, there is virtually no music below 25 hertz. You probably couldn't hear it if there were anyway. Since you can't hear it(or since the box can't reproduce it) why would you let your amplifier recreate it? A subsonic filter will also prevent your amplifier from "wasting" any power.