Dual driver system

Michael Speaker · 11th October 2005, 06:43 AM

Has anybody tried this arrangement? They run in phase. I read somewhere the front driver is well isolated from the influence of the enclosure and therefore behaves like one on an infinite baffle. The disadvantage would be you use two drivers (half the impedance as well, since they are in parallel), but you can have a very small enclosure without the drawbacks. I am not an expert at all to judge, intuitively it makes sense to me, but would like to hear from one who really tried this.

Thanks,
Michael

mazeroth · 11th October 2005, 07:32 AM

This doesn't make sense to me. The box the driver in the back is in would definately affect the sound in my opinion. If you think about it, you can't do an alignment like this with dual 12s and have the rear woofer in a 1 ft3 enclosure and think it will work like it's in an IB. I doubt there would be any benefit. If anything this is just an inverse bandpass config, where you only need half the enclosure size but twice the drivers and power. You also yield less distortion with this alignment.

Joules · 11th October 2005, 10:58 AM

Half the enclosure size, twice the power handling, less ditortion less influence from rear wave --- other than the extra driver what's not to like?

BTW · 11th October 2005, 12:21 PM

It's called an Isobarik speaker. Some Isobarik speakers include Linn Isobarik, Sara, Neat, Wilson Benesh ..
See this article for more info.

Isobarik

sachi · 11th October 2005, 12:24 PM

Isn't the push pull type isobarik better than the one presented above.
The first driver would tend to get hot and the parameters would change,right?

Sachi

BTW · 11th October 2005, 12:46 PM

Quote:

Originally posted by sachi
Isn't the push pull type isobarik better than the one presented above.
The first driver would tend to get hot and the parameters would change,right?

Sachi

Not a spk temperature expert but Clam shell type Isobarik is best as air is compressible and clamshell arrangements minimises the chamber of air. Drawback because you are using the back of the drivers(facing you) the higher frequency are attenuated.

Scottmoose · 11th October 2005, 12:56 PM

They work.

I'd go for a bipolar push-push though.

mazeroth · 11th October 2005, 05:46 PM

Quote:

Originally posted by mazeroth
If anything this is just an inverse bandpass config

I meant to say isobarik

Michael Speaker · 12th October 2005, 07:28 AM

Guys, thanks a lot. After reading the tutorial in that link, I think I will rather avoid this configuration.

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11th October 2005, 07:32 AM	#2
mazeroth diyAudio Member Join Date: Jul 2004 Location: Columbus, OH	This doesn't make sense to me. The box the driver in the back is in would definately affect the sound in my opinion. If you think about it, you can't do an alignment like this with dual 12s and have the rear woofer in a 1 ft3 enclosure and think it will work like it's in an IB. I doubt there would be any benefit. If anything this is just an inverse bandpass config, where you only need half the enclosure size but twice the drivers and power. You also yield less distortion with this alignment.

11th October 2005, 10:58 AM	#3
Joules diyAudio Member Join Date: Nov 2004 Location: Manassas virginia usa	Half the enclosure size, twice the power handling, less ditortion less influence from rear wave --- other than the extra driver what's not to like?

11th October 2005, 12:21 PM	#4
BTW diyAudio Member Join Date: Nov 2002 Location: Singapore	It's called an Isobarik speaker. Some Isobarik speakers include Linn Isobarik, Sara, Neat, Wilson Benesh .. See this article for more info. Isobarik

11th October 2005, 12:24 PM	#5
sachi diyAudio Member Join Date: Dec 2003 Location: Silicon Forest	Isn't the push pull type isobarik better than the one presented above. The first driver would tend to get hot and the parameters would change,right? Sachi

11th October 2005, 12:56 PM	#7
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	They work. I'd go for a bipolar push-push though.

12th October 2005, 07:28 AM	#9
Michael Speaker diyAudio Member Join Date: Oct 2005 Location: Beaverton, OR	Guys, thanks a lot. After reading the tutorial in that link, I think I will rather avoid this configuration.

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