Playing a Few Hz below Box tuning really bad?

[bimmerboy 3]

Will playing 5hz below my enclosure frequency be harmful for my woofer?

My enclosure is tuned to 33hz right now, but on a couple of songs the notes drop to 28hz.

My SSF is at 0 (dont kill me!) and here is why:

The other day I played with test tones from 27-35hz and tried to set my SSF to about 28hz... For some reason no matter how much I adjusted the SSF to only begin at 28hz, it would decrease my 30-33hz output as well... As of now I keep it at 0 and just be careful not to play anything below 33hz too loud.

Not trying play 20hz notes or anything, just wanted to know if its harmful to play a few Hz below your tuning freq. Don't wanna kill my woofer!

Thanks!

Edited November 26, 2010 by bimmerboy

[kirill007 52]

Then put the subsonic filter a 26 instead of 28....

[Shogen 325]

Then put the subsonic filter a 26 instead of 28....

Simple yet elegant! Yes!!!

[Dictator1992 6]

..just put it at 26hz you should be fine.

[slim142 9]

Then put the subsonic filter a 26 instead of 28....

Simple yet elegant! Yes!!!

I loled

[bimmerboy 3]

Then put the subsonic filter a 26 instead of 28....

Simple yet elegant! Yes!!!

Will try that.... So playing 28-32hz won't be bad?

[kirill007 52]

Setting it at 26 hz is always better then 0...

So it would protect a little better, but still you should set it correctly.

[flastrongman 8]

I'm tuned at 35hz and very often play 25hz with ssf at 0. I've had no problems with subs even with an oversized box.

[bimmerboy 3]

Ok just set the SSF @25hz but once again when I go to a 33hz tone and turn the SSF off it will instantly get louder, :puzzed:

I'm just gonna keep it at 0..

I'm tuned at 35hz and very often play 25hz with ssf at 0. I've had no problems with subs even with an oversized box.

Thanks for the input, makes me feel better about keeping it at 0

[ssh 924]

can you say recones?

[Impious 1,476]

How you are setting the SSF to specific frequencies?

Two explanations for the difference in output at >30hz with the SSF set below that. First, an SSF is nothing more than a highpass filter. The crossover point for the SSF is the -3db point for the filter. So even though it is set to 25hz, it is going to begin attenuating frequencies well above 25hz. Second, depending on how you are setting the SSF, you might not be setting it as accurately as you think.

As far as what is "safe". There's no real answer. It depends on how much power you are running and the excursion levels of your driver in the enclosure. This can be predicted with any enclosure modeling program. Generally there is going to be *some* frequency range below tuning that the drivers excursion will remain with it's linear limits, and then a wider frequency range below tuning that the driver will stay within it's mechanical limits. But where those ranges fall is dependent upon your power level and enclosure.

[bimmerboy 3]

How you are setting the SSF to specific frequencies?

Two explanations for the difference in output at >30hz with the SSF set below that. First, an SSF is nothing more than a highpass filter. The crossover point for the SSF is the -3db point for the filter. So even though it is set to 25hz, it is going to begin attenuating frequencies well above 25hz. Second, depending on how you are setting the SSF, you might not be setting it as accurately as you think.

As far as what is "safe". There's no real answer. It depends on how much power you are running and the excursion levels of your driver in the enclosure. This can be predicted with any enclosure modeling program. Generally there is going to be *some* frequency range below tuning that the drivers excursion will remain with it's linear limits, and then a wider frequency range below tuning that the driver will stay within it's mechanical limits. But where those ranges fall is dependent upon your power level and enclosure.

No matter how hard I try to set the SSF to begin attenuating the 25-28hz frequencies, 32-34hz subsequently becomes attenuated also. This is what I am having a tough time with, setting the SSF to around 28hz but also keeping >32hz as loud as possible...

As for how I am setting the SSF, I was playing individual test tones (25-33hz) and moving the SSF up until it starts to audibly make a difference. Once I got the 25hz output to decrease, i would go up to 33hz at the same volume and listen. Then I would turn the SSF back to 0@33hz, which is when i can hear a big difference between the two SSF points....

Its almost as if the SSF on my amp (SAZ-1500d) isn't accurate enough or maybe the frequency spread between 25 and 33hz isn't large enough to attenuate one but not the other

Is there a better way to set the SSF? I don't have a DMM but now i'm thinking it might be easier to set with it?

Edited November 27, 2010 by bimmerboy

[Impious 1,476]

Yes, you would need a DMM to set the SSF with any kind of accuracy.

[Thumpper 266]

remember the octive slope( 6db,12db,18db or 24db) on the SSF varies on different amps..

if you need the protection of a SSF you don't need to set it any higher than the 20 to 22hz range

to eliminate the high excursion notes

personally a SSF always gets in my way of nice deep ripps right down to 10hz and head bopping bass guitar strings..