Two different drivers in same enclosure

Gaichuke · 2nd July 2009, 09:41 AM

Hello everyone,

I have a problem where I have a predefined box with fixed dimensions and I would like to use two sets of drivers there. The box size doesn't allow two separate enclosures besides for the channels, so I have a problem.

I think this might be a bad idea, but I was wondering if any of you guys could tell me how bad exactly.

This is the setup:

10" Driver A + tweeter A parallel to 5" Driver B + tweeter B

All the elements would be on the same channel and in the same enclosure too. Thiele/Small parameters are quite different for the drivers.

Thanks for the replies.

picowallspeaker · 2nd July 2009, 10:05 AM

What is predefined ?
Are the tweeters the same?
I've sketched some ideas , but reading the post better seems that there are limitations .
I 'll post my contribution anyway
Regards

Gaichuke · 2nd July 2009, 10:09 AM

By predefined I meant that I have a box that I want to use for a speaker project.

I will use two sets of driver+tweeter parallel, but the box is too small to have separate enclosures inside for each drivercombo.

So I would have a 10" driver , 1" tweeter, 5" driver, and another tweeter (different than the other tweeter) in a same enclosure.

I guess at least the tuning would be very difficult for this kind of setup.

Any other adverse effects?

Inductor · 2nd July 2009, 10:24 AM

(And) Do (n't) you have cheese?
That's good for an omelet...
Follow others plans (like picowallspeaker) for now, if you don't want to lose your ('s and other people's) time. People that don't know, should ask first before they DO, that's what it's irritating. That's not personal, IT'S FOR EVERYBODY.

Quote:

I have a problem where I have a predefined box with fixed dimensions and I would like to use two sets of drivers there. The box size doesn't allow two separate enclosures besides for the channels, so I have a problem.

NOW YOU HAVE 2 PROBLEMS THE FIRST AND THE SECOND, and Im going to put you in 'Summer Camp'

Gaichuke · 2nd July 2009, 10:33 AM

I don't have an option for the box choice. I know this is not wise, but it's have to be like this.

I just want to know what kind of problems to expect.

picowallspeaker · 2nd July 2009, 10:36 AM

That's quick!
And you can look at the images ,also!
talking about my drawings , the first allows you to go towards the OB way of thinking , so the pros would be ASTONISHING speed and power , the cons that you should use two amplifiers ( contradiction.. this is a pro !)each for each speaker , driving it to its maximum performances and get rid of all the parameters .
The second requires toughful thinking of how to build a double chambered reflex (?!)to give adequate mass loading for the woofer - which I presume is the 10'' unit,right?
If you're a real man ,pick your saw and build ! Try to avoid parallel parts in the cabinet , I've read that somewhere...

Inductor · 2nd July 2009, 10:42 AM

Quote:

Originally posted by picowallspeaker
That's quick!
And you can look at the images ,also!
talking about my drawings , the first allows you to go towards the OB way of thinking , so the pros would be ASTONISHING speed and power , the cons that you should use two amplifiers ( contradiction.. this is a pro !)each for each speaker , driving it to its maximum performances and get rid of all the parameters .
The second requires toughful thinking of how to build a double chambered reflex (?!)to give adequate mass loading for the woofer - which I presume is the 10'' unit,right?
If you're a real man ,pick your saw and build ! Try to avoid parallel parts in the cabinet , I've read that somewhere...

Do you mean he could have the 10" in the box and the 5" OB? Must be a good idea.

Quote:

Originally posted by Gaichuke
another tweeter (different than the other tweeter)

Now Gaichuke explain why you need 2 different tweeters in same box if not for garbage bin.

picowallspeaker · 2nd July 2009, 10:51 AM

Inductor you are in my ignore list !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
You and your friend , cap !!!!
Got that ?
Yes , why not ? For saving space and keep it fully OB ( well ,the space saved from the cabinet should be tempered by adequate positioning ... ) my solution is to equalize the bass response before the amplifier and use no network at power level.

Gaichuke · 2nd July 2009, 11:06 AM

This thing has to have two sets of speakers parallel (2x8 ohm to 4 ohm) to get enough power from the amplifier. The box is chosen already because of it's appearance.

But still...

Guys, you're giving me solutions, but not exactly answers. I can only do minor chances to the plan, so I doubt anything big can be done.

But I still want to know what kind of problems there will be, and is there anything I can do to avoid or ease these problems.

Inductor · 2nd July 2009, 11:07 AM

Gaichuke,
For a good comprehensive answer, besides looks, people need all the detailed specs from your speakers. Ok, let's start somewhere, first the two woofers can not be in the same box (in contact) with out being isolated, or the 5" has an independent closed box?

2nd July 2009, 09:41 AM	#1
Gaichuke diyAudio Member Join Date: Jun 2009	Two different drivers in same enclosure Hello everyone, I have a problem where I have a predefined box with fixed dimensions and I would like to use two sets of drivers there. The box size doesn't allow two separate enclosures besides for the channels, so I have a problem. I think this might be a bad idea, but I was wondering if any of you guys could tell me how bad exactly. This is the setup: 10" Driver A + tweeter A parallel to 5" Driver B + tweeter B All the elements would be on the same channel and in the same enclosure too. Thiele/Small parameters are quite different for the drivers. Thanks for the replies.

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2nd July 2009, 10:09 AM	#3
Gaichuke diyAudio Member Join Date: Jun 2009	By predefined I meant that I have a box that I want to use for a speaker project. I will use two sets of driver+tweeter parallel, but the box is too small to have separate enclosures inside for each drivercombo. So I would have a 10" driver , 1" tweeter, 5" driver, and another tweeter (different than the other tweeter) in a same enclosure. I guess at least the tuning would be very difficult for this kind of setup. Any other adverse effects?

2nd July 2009, 10:33 AM	#5
Gaichuke diyAudio Member Join Date: Jun 2009	I don't have an option for the box choice. I know this is not wise, but it's have to be like this. I just want to know what kind of problems to expect.

2nd July 2009, 10:36 AM	#6
picowallspeaker diyAudio Member Join Date: Apr 2007	That's quick! And you can look at the images ,also! talking about my drawings , the first allows you to go towards the OB way of thinking , so the pros would be ASTONISHING speed and power , the cons that you should use two amplifiers ( contradiction.. this is a pro !)each for each speaker , driving it to its maximum performances and get rid of all the parameters . The second requires toughful thinking of how to build a double chambered reflex (?!)to give adequate mass loading for the woofer - which I presume is the 10'' unit,right? If you're a real man ,pick your saw and build ! Try to avoid parallel parts in the cabinet , I've read that somewhere...

2nd July 2009, 10:51 AM	#8
picowallspeaker diyAudio Member Join Date: Apr 2007	Inductor you are in my ignore list !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! You and your friend , cap !!!! Got that ? Yes , why not ? For saving space and keep it fully OB ( well ,the space saved from the cabinet should be tempered by adequate positioning ... ) my solution is to equalize the bass response before the amplifier and use no network at power level.

2nd July 2009, 11:06 AM	#9
Gaichuke diyAudio Member Join Date: Jun 2009	This thing has to have two sets of speakers parallel (2x8 ohm to 4 ohm) to get enough power from the amplifier. The box is chosen already because of it's appearance. But still... Guys, you're giving me solutions, but not exactly answers. I can only do minor chances to the plan, so I doubt anything big can be done. But I still want to know what kind of problems there will be, and is there anything I can do to avoid or ease these problems.

2nd July 2009, 11:07 AM	#10
Inductor diyAudio Member Join Date: Feb 2006 Location: Cascais	Gaichuke, For a good comprehensive answer, besides looks, people need all the detailed specs from your speakers. Ok, let's start somewhere, first the two woofers can not be in the same box (in contact) with out being isolated, or the 5" has an independent closed box?

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