Loudest SPL frequency

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jvillefinest

Copper - Posts: 255

Joined: December 29, 2003

Location: Florida, United States

Posted: January 31, 2005 at 8:51 PM / IP Logged

I plan to make a ported competition box. Is there a way to find the Loudest SPL frequency when making a ported box.

Thanks

2007 Acura TSX

SQ setup in the works

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bullman96

Silver - Posts: 294

Joined: October 03, 2004

Location: United States

Posted: January 31, 2005 at 9:13 PM / IP Logged

find the frequency for your car that has the most cabin gain

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jvillefinest

Copper - Posts: 255

Joined: December 29, 2003

Location: Florida, United States

Posted: February 01, 2005 at 10:17 AM / IP Logged

I thought there was a way to take some of the specs of the speakers and then be able to figure the Frequency needed?

2007 Acura TSX

SQ setup in the works

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jvillefinest

Copper - Posts: 255

Joined: December 29, 2003

Location: Florida, United States

Posted: February 01, 2005 at 10:18 AM / IP Logged

and if the cabin gain thing is true how do you fingure that out?

2007 Acura TSX

SQ setup in the works

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kfr01

Gold - Posts: 2,121

This member has made a donation to the12volt.com. Click here for more info.

Joined: April 30, 2003

Posted: February 01, 2005 at 4:02 PM / IP Logged

The cabin gain "thing" IS true. Different cars with different setups will boost / cut different frequencies. It would be impossible for me to tell you, "42.76hz" is teh elite.

Get an SPL meter at ratshack and some cd's with tracks at different frequencies.

New Project: 2003 Pathfinder

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Maxst

Silver - Posts: 866

Joined: June 06, 2003

Location: United States

Posted: February 01, 2005 at 5:05 PM / IP Logged

Find the cabin gain number then make a bandpass box. Comp only. since anything outside that hz range will sound like ass. Also its really hard to tell if the sub is distorting..

I need quality equipment, feel free to donate.

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audiobass10

Silver - Posts: 328

Joined: October 11, 2004

Location: United States

Posted: February 01, 2005 at 6:38 PM / IP Logged

Try finding a sub with an Fs closest to your ideal tuned frequency. then the sub is most efficient and the enclosure is most efficnet, combined, at the sympathetic frequency of the cabin.

lower the cabin frequency by sound deadening it to help achieve that matched point. Then, you need to find the peak efficiency point for the amplifier based on load as well as the enclosure and sub combination in the cabin of said vehicle.

this will help to get the most power out of the amp where the load drops to it's lowest point in the response curve, which you want to be about where the cabin gain kicks in for transfer point.

Dave

Pioneer Premier DEH-P660

15" Kicker CVR

Profile AP1000M

It's Loud

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Loudest SPL frequency

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