What sounds equate to 30hz or below?

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neverendingbeatz
Posts: 275
Joined: Tue Oct 24, 2006 1:36 pm
Location: Los Angeles, CA
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Re: What sounds equate to 30hz or below?

#16 Post by neverendingbeatz »

So do you think it would be irrational to put a 48db slope low pass at 25hz and high pass it at 80hz?

sine143
Posts: 3066
Joined: Sat Feb 06, 2010 3:27 pm
Location: Raleigh NC

Re: What sounds equate to 30hz or below?

#17 Post by sine143 »

for the Titan 48? Absolutely irrational.

Lopass wherever you like. its a matter of opinion. The hipass is absolutely critical for driver protection. although the sub can produce plenty below 45 hz, its a matter of reaching the mechanical limits of the driver (destroying it).

QUESTION:

http://billfitzmaurice.info/forum/viewt ... f=12&t=440

the impedence chart on that page (bottom) shows a huge spike at 32 ohms. Is this correlated with a frequency that is detrimental to the driver at full power?
Built:
2x Tuba 30s delta12lf loaded (gone)
4x Otop12 d2512 loaded
8x t48s (18, 18, 24, 24, 30, 30) 3015lf loaded
2x AT (1 mcm, 1 gto 804)
2x SLA Pro (dayton pa6, 6 goldwood piezo loaded)
1x bastard XF208

2x OT212 (delta pro 450a loaded, eminence psd)

SeisTres
Posts: 2688
Joined: Fri Apr 24, 2009 3:53 am
Location: Dallas, tx

Re: What sounds equate to 30hz or below?

#18 Post by SeisTres »

sine143 wrote:for the Titan 48? Absolutely irrational.

Lopass wherever you like. its a matter of opinion. The hipass is absolutely critical for driver protection. although the sub can produce plenty below 45 hz, its a matter of reaching the mechanical limits of the driver (destroying it).

QUESTION:

http://billfitzmaurice.info/forum/viewt ... f=12&t=440

the impedence chart on that page (bottom) shows a huge spike at 32 ohms. Is this correlated with a frequency that is detrimental to the driver at full power?
This is where the the tuning of the cab unloads the driver, and after that, linear cone movement rises exponentially. Just look at some of the eminence spec sheets that show the impedance/sensitivity/cone movement.
Built:6 t39, t18, 4 Jack10, 2 autotuba, 2 SLA,2 wedge, 2 TT, 2 Tritrix, curved sla, 2 otop212, 2 SLA pros, Ported 8" sub, 2 ported 210, dual ported 8" sub

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