subsonic filter on sealed boxes...

[aaron7114 10+ year member]

I read yesterday that if you have a sealed box you are supposed to turn the subsonic filter on your amp completely....why is this? Probably a stupid question but I guess I have never really thought about it. Thanks.

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[revrider1 5,000+ posts]

You dont need it if you are sealed...

 

[aaron7114 10+ year member]

You dont need it if you are sealed...

would it not help protect your sub? And does it have any advantages and/or disadvantages than having it turned on in a sealed box?

 

[wesl56 10+ year member]

naw cause your sub has sufficent dampening at low freqs in a sealed box

disadvantages? might make your lows a little quieter

 

[ssj2xxgotenxx 10+ year member]

The purpose of a SSF is to protect your subwoofer from playing freq that would normally damage your driver in a vented box. It's based on the tuning frequency of the box, but since your box is sealed, it doesn't deal with tuning frequencies and ultimately a SSF is completly useless for you. Long story short it doesn't benifit you @ all.

 

[n2audio 5,000+ posts]

It could reduce some stress on your amp by preventing it from trying to play freq's you're not going to hear anyway - but it will have little effect on your subs.

 

[seg_representin 10+ year member]

How do you turn it off on your amp? I have a hifonics titan txi6006. If anyone knos how let me kno.

 

[helotaxi 5,000+ posts]

It can increase the power handling of the sub actually. As the frequency played gets lower, the excursion increases exponentially with the same amount of power. If you have enough power that you are approaching max excursion at around 40Hz, you will well exceed the limit with 30Hz. If you use a SSF to limit the low freq, you can turn it up without worrying about it.

 

[aaron7114 10+ year member]

It can increase the power handling of the sub actually. As the frequency played gets lower, the excursion increases exponentially with the same amount of power. If you have enough power that you are approaching max excursion at around 40Hz, you will well exceed the limit with 30Hz. If you use a SSF to limit the low freq, you can turn it up without worrying about it.

are you saying it is can increase the power handling with the filter on or off?

 

[angryeric116 10+ year member]

so should a SSF in a vented box be tuned to what the box is tuned to? or what?

 

[helotaxi 5,000+ posts]

are you saying it is can increase the power handling with the filter on or off?

Well, since turning it off would be the same a not having it, how could it do anything when off? Turning it on and using it to limit overexcursion at low freqs is the only answer that makes sense now isn't it?

 

[squeak9798 5,000+ posts]

so should a SSF in a vented box be tuned to what the box is tuned to? or what?

Typically a good setting is about 1/2 octave below the tuning frequency. Allows you to retain a little better low frequency extension while still adequately protecting the subwoofer.

 

[SQBubble 10+ year member]

so should a SSF in a vented box be tuned to what the box is tuned to? or what?

5-10hz below tuning..

if its tuned low(28-30hz) u dont need to set SSF , but u can always do it by the ear..