Beginner with enclosure volume questions

Javachip · 12th March 2006, 07:13 AM

I have a visual design concept for a loudspeaker, but I do not know if it would sound good. Would someone please briefly explain how does a sealed enclosure serve to extend the bass response of a driver? How is the optimal enclosure volume of a driver predicted or calculated? Why is the recommended sealed enclosure volume for a driver usually less than the ported volume? What would happen if 2 cone drivers were mounted in-phase in a sealed enclosure with significantly less volume than the recommended volume? Thank you.

qi · 12th March 2006, 08:43 AM

http://sound.westhost.com/project48.htm

Cal Weldon · 12th March 2006, 02:23 PM

This is a link to help design your box. If you have the T/S parameters just plug them in.

http://www.mhsoft.nl/spk_calc.asp

Most of your questions will be answered as you go through, it's a great site.

Everytime you double up the drivers you have to double the volume as well. If your box is too small, the box doesn't allow the drivers to "breath" enough and the depth of bass is compromised.

It actually gets quite complicated the further you delve into it but sites like that seem to ease the pain a bit.

myhrrhleine · 12th March 2006, 08:03 PM

Quote:

Originally posted by Javachip
[B]I have a visual design concept for a loudspeaker, but I do not know if it would sound good. Would someone please briefly explain how does a sealed enclosure serve to extend the bass response of a driver?

As a speaker cone moves forward, pushing air, the back of the cone is also moving, but sucking air.
The cabinet separates the front from back.

Quote:

How is the optimal enclosure volume of a driver predicted or calculated?

Speaker parameters determine optimal volume.
Primarily Vas, Fs, Qts

Quote:

Why is the recommended sealed enclosure volume for a driver usually less than the ported volume?

It depends on performance design goals

[quote]What would happen if 2 cone drivers were mounted in-phase in a sealed enclosure with significantly less volume than the recommended volume? /QUOTE]

You'd get less bass.
You'd get a response that peaks at a inconvenient place.
It'd sound rather 'flabby'

Javachip · 14th March 2006, 11:56 AM

Thank you for the helpful info! This will guide me in refining the concept.

12th March 2006, 07:13 AM	#1
Javachip diyAudio Member Join Date: Dec 2005 Location: CA	Beginner with enclosure volume questions I have a visual design concept for a loudspeaker, but I do not know if it would sound good. Would someone please briefly explain how does a sealed enclosure serve to extend the bass response of a driver? How is the optimal enclosure volume of a driver predicted or calculated? Why is the recommended sealed enclosure volume for a driver usually less than the ported volume? What would happen if 2 cone drivers were mounted in-phase in a sealed enclosure with significantly less volume than the recommended volume? Thank you.

12th March 2006, 02:23 PM	#3
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	This is a link to help design your box. If you have the T/S parameters just plug them in. http://www.mhsoft.nl/spk_calc.asp Most of your questions will be answered as you go through, it's a great site. Everytime you double up the drivers you have to double the volume as well. If your box is too small, the box doesn't allow the drivers to "breath" enough and the depth of bass is compromised. It actually gets quite complicated the further you delve into it but sites like that seem to ease the pain a bit. __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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12th March 2006, 08:43 AM	#2
qi diyAudio Member Join Date: Oct 2003 Location: .	http://sound.westhost.com/project48.htm

14th March 2006, 11:56 AM	#5
Javachip diyAudio Member Join Date: Dec 2005 Location: CA	Thank you for the helpful info! This will guide me in refining the concept.

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