Increasing the bass

carshateme · 3rd October 2011, 07:32 PM

To increase the bass dynamics out of a sub box...what would I do...stuff cotton in it or just line the wall with cotton? This box is an enclosed box.

Another question is if I have an enclosed box, would I want to drill a port hole in the center board for more air space for the subs to breathe?

Perry Babin · 3rd October 2011, 07:34 PM

Cutting a hole between chambers won't make an audible difference.

Forget about the damping material.

carshateme · 08:19 PM

Are you sure...because I'm told by a lot of people that putting damping material in the box makes it more efficient.

But I'll take your advice and do it without cotton and do one w cotton see which sounds better

Perry Babin · 3rd October 2011, 08:24 PM

Ask those people to be VERY specific about the increase in efficiency. I'm sure that they wont' be able to give any supporting data from tightly controlled tests. That's the problem with most online discussions/arguments. There are too few specifics. The following is a graph generated by LEAP. The fill is 1lb of polyfil/ft^3. You can see that there is little difference.

carshateme · 3rd October 2011, 08:26 PM

Quote:

Originally Posted by Perry Babin

Ask those people to be VERY specific about the increase in efficiency. I'm sure that they wont' be able to give any supporting data from tightly controlled tests. That's the problem with most online discussions/arguments. There are too few specifics. The following is a graph generated by LEAP. The fill is 1lb of polyfil/ft^3. You can see that there is little difference.

actually Those people that told me are my real life friends and people I know...but some of them I think are just bullshitters...especially one.. But that graph...have no idea what it means...I'm not that into audio...yet. Though I'm going for audio engineering soon. (college that is)

But you got me convinced...I'll do em without cotton.

Perry Babin · 3rd October 2011, 08:29 PM

The graph shows that there is essentially no difference. It would not be audible.

carshateme · 3rd October 2011, 08:32 PM

AH okay. Thanks...I just want my system at 100dB.

Frank Berry · 3rd October 2011, 08:35 PM

Stuffing damping material in a sealed enclosure will only make the internal volume of the box slightly smaller. You will not hear any difference.

carshateme · 3rd October 2011, 08:42 PM

Okay, how do I calculate my volume of my box after my subs are put in the equation?

Perry Babin · 3rd October 2011, 09:02 PM

Contact the manufacturer or the owner's manual for the displacement volume of the woofers. Subtract that from the total volume.

3rd October 2011, 07:32 PM	#1
carshateme diyAudio Member Join Date: Sep 2011	Increasing the bass To increase the bass dynamics out of a sub box...what would I do...stuff cotton in it or just line the wall with cotton? This box is an enclosed box. Another question is if I have an enclosed box, would I want to drill a port hole in the center board for more air space for the subs to breathe? __________________ 1995 Buick Skylark Custom: Hifonics HIF2000D amp Big 3 Upgrade 1/0 gauge wire 3 10" ALUM10N Audiobahns XS Power XP2000 battery Sony CDX-GT43IPW head unit 12k Kensun headlights L.E.D back Kensun lights Street Glow blue neon light interior

3rd October 2011, 07:34 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Cutting a hole between chambers won't make an audible difference. Forget about the damping material. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

3rd October 2011, 08:17 PM	#3
carshateme diyAudio Member Join Date: Sep 2011	Are you sure...because I'm told by a lot of people that putting damping material in the box makes it more efficient. But I'll take your advice and do it without cotton and do one w cotton see which sounds better __________________ 1995 Buick Skylark Custom: Hifonics HIF2000D amp Big 3 Upgrade 1/0 gauge wire 3 10" ALUM10N Audiobahns XS Power XP2000 battery Sony CDX-GT43IPW head unit 12k Kensun headlights L.E.D back Kensun lights Street Glow blue neon light interior Last edited by carshateme; 3rd October 2011 at 08:19 PM.

3rd October 2011, 08:29 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The graph shows that there is essentially no difference. It would not be audible. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

3rd October 2011, 08:32 PM	#7
carshateme diyAudio Member Join Date: Sep 2011	AH okay. Thanks...I just want my system at 100dB. __________________ 1995 Buick Skylark Custom: Hifonics HIF2000D amp Big 3 Upgrade 1/0 gauge wire 3 10" ALUM10N Audiobahns XS Power XP2000 battery Sony CDX-GT43IPW head unit 12k Kensun headlights L.E.D back Kensun lights Street Glow blue neon light interior


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3rd October 2011, 08:35 PM	#8
Frank Berry diyAudio Member Join Date: Sep 2003 Location: Midland, Michigan	Stuffing damping material in a sealed enclosure will only make the internal volume of the box slightly smaller. You will not hear any difference. __________________ Frank

3rd October 2011, 08:42 PM	#9
carshateme diyAudio Member Join Date: Sep 2011	Okay, how do I calculate my volume of my box after my subs are put in the equation? __________________ 1995 Buick Skylark Custom: Hifonics HIF2000D amp Big 3 Upgrade 1/0 gauge wire 3 10" ALUM10N Audiobahns XS Power XP2000 battery Sony CDX-GT43IPW head unit 12k Kensun headlights L.E.D back Kensun lights Street Glow blue neon light interior

3rd October 2011, 09:02 PM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Contact the manufacturer or the owner's manual for the displacement volume of the woofers. Subtract that from the total volume. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

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