determining optimum box size - Home Theater Forum and Systems - HomeTheaterShack.com

Old 08-15-11, 07:56 PM Thread Starter
Senior Shackster
apilon

Join Date: May 2006
Posts: 258
My System
determining optimum box size

Good afternoon

I am trying to find out how to determine the optimum box size in regard to the size of the driver being used.

Let me explain....If you want to use a 15 inch driver i know that you can use software like winisd but what criteria do you use to find out the optimum box size or volume? I noticed that winisd has a function that calculate the optimum box size but under what criteria? Volume entered?

Alain
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Old 08-15-11, 08:07 PM
Senior Shackster

Join Date: Nov 2010
Posts: 762
First you need to determine which driver you want to use. Then you need to the t/s parameters from the manufacturer and plug them into winisd. Then you can play around with different volumes to determine the result that's you want.
Jstslamd is offline
Old 08-16-11, 01:47 AM
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Join Date: Sep 2008
Location: Newcastle Australia
Posts: 5,624
Re: determining optimum box size

A couple of questions:-
What driver are you looking at and do you want sealed or ported?
Is it going to be solely for music or HT or a mixture of both?
Do you have a size for the enclosure in mind that you would like to use?

Let us know and we will try and help.
Cheers,
Bill.

Silence is golden but duct tape is silver.

DIY completed:
http://www.hometheatershack.com/foru...-shelf.html
robbo266317 is offline
Old 08-16-11, 04:07 AM
Elite Shackster

Join Date: Aug 2008
Posts: 7,142
Re: determining optimum box size

Quote:
apilon wrote: View Post
Good afternoon

I am trying to find out how to determine the optimum box size in regard to the size of the driver being used.

Let me explain....If you want to use a 15 inch driver i know that you can use software like winisd but what criteria do you use to find out the optimum box size or volume? I noticed that winisd has a function that calculate the optimum box size but under what criteria? Volume entered?

Alain
Is this a specific question or a generalization one. If specific, we would need the info already asked for, i.e, the driver being used, the intended use for the sub, the maximum size you can accommodate, and if you want to go ported or sealed.

If its a general question, then there is no one answer. 'x' driver can go in boxes of various sizes depending on what your goals are. Sealed designs will always be smaller than ported ones, and there can be quite a bit of variation in ported designs, depending on the end results you want.
Moonfly is offline
Old 08-16-11, 10:07 AM Thread Starter
Senior Shackster
apilon

Join Date: May 2006
Posts: 258
My System
Re: determining optimum box size

Quote:
robbo266317 wrote: View Post
A couple of questions:-
What driver are you looking at and do you want sealed or ported?
Is it going to be solely for music or HT or a mixture of both?
Do you have a size for the enclosure in mind that you would like to use?

Let us know and we will try and help.
Cheers,
Bill.
I was looking at the mach5 ixl15.2.2 driver, and i saw on their website a box design for 91l which looks interesting and i sent a question to the tech support in regards to should i line the walls with foam or just fill the box with polyfill and is answer was that i should fill a box only if i plan on building a box that is much smaller than the optimum size for the driver

so it got me thinking about what is the optimum size according to the driver?

I played with winisd a bit but not sure i am using it properly
apilon is offline
Old 08-16-11, 10:38 AM
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Mike

Join Date: Apr 2007
Posts: 19,397
Re: determining optimum box size

Quote:
I was looking at the mach5 ixl15.2.2 driver, and i saw on their website a box design for 91l
You must mean 70 liters sealed.

Sealed - 70L
Bass Reflex - 84L 30Hz tuning
EBS - 170L 17Hz tuning
Mike P. is offline
Old 08-16-11, 04:23 PM Thread Starter
Senior Shackster
apilon

Join Date: May 2006
Posts: 258
My System
Re: determining optimum box size

Quote:
Mike P. wrote: View Post
You must mean 70 liters sealed.

Sealed - 70L
Bass Reflex - 84L 30Hz tuning
EBS - 170L 17Hz tuning

Nope 91L net volume 30Hz Tuning

http://www.istonline.ca/mach5_enclosures.html
apilon is offline
Old 08-16-11, 05:03 PM
Senior Shackster

Join Date: Nov 2010
Posts: 762
It's probably 91l total but after driver and port displacement it's 84l tuned to 30 hz.
Jstslamd is offline
Old 08-16-11, 05:44 PM
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Mike

Join Date: Apr 2007
Posts: 19,397
Re: determining optimum box size

Quote:
apilon wrote: View Post
Nope 91L net volume 30Hz Tuning

http://www.istonline.ca/mach5_enclosures.html
That would be a car audio recommendation, not for HT or home audio.
Mike P. is offline
Old 08-18-11, 11:42 PM Thread Starter
Senior Shackster
apilon

Join Date: May 2006
Posts: 258
My System
Re: determining optimum box size

Quote:
Mike P. wrote: View Post
That would be a car audio recommendation, not for HT or home audio.
I don't know got an answer back today from the tech support that says that the enclosure design proposed can be use for HT

looking at the drawing guess it can make sens

Alain
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