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Old 28th July 2001, 07:35 AM   #1
Vivek is offline Vivek  India
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Hi Guys,
I am in the process of building a speaker system. I have a 1 inch dome tweeter and 8 inch woofer. The woofer's impedance is 4 ohm while the tweeter's impedance is 8 ohm. Now, when building speakers, should the impedances of all drivers match or can they be different since I plan to bi-wire them. I do not want to spend money for another woofer.
Any help would be greatly appreciated.
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Old 28th July 2001, 04:09 PM   #2
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Vivek,
No, they don't have to be the same, however, keep in mind that the load presented to your amp will vary with frequency. Neglecting the effect of the passive crossover, you'll be getting a 4 ohm load within the woofer's operating range, and 8 ohm whilst the tweeter is handling the sonic duties.

Grey
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Old 28th July 2001, 04:19 PM   #3
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They can be different. When you build the crossover, the impedence should be input to the correct calcultion to determine the crossover point for each driver. If you are using bi-amping, it shouldn't be any trouble. If they were used in parallel, I'm sure the total impedence would drop.
Sounds like you'll be ok w/ your setup.
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Old 28th July 2001, 06:46 PM   #4
Vivek is offline Vivek  India
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Thanks guys.
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Old 28th July 2001, 11:00 PM   #5
blmn is offline blmn  Brazil
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Vivek,

No problems about diffrent impedances in your case, but be aware of the mid range response of your system because you are using a reasonable large woofer and a little tweeter.

Regards,

blmn
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Old 29th July 2001, 06:47 AM   #6
Vivek is offline Vivek  India
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Thanks again blmn.
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Old 29th July 2001, 10:06 PM   #7
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(I'm glad blmn said that, so that I didn't have to. I managed to start a small riot by saying essentially the same thing in another thread and was trying to avoid doing the same thing here...)

Grey
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Old 30th July 2001, 02:55 AM   #8
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Actually, I was on-line the same time you were, Grey. I only noticed you answered before me when I hit submit. I saw what that other clown wrote in the threads, don't sweet that guy. Your answers are productive.
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Old 30th July 2001, 06:45 PM   #9
blmn is offline blmn  Brazil
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GRollins,

It is a very commmon problem for us loudspeakers dyers when we are trying to conciliate good bass response, size, wife desire and cost.

I always use 6" or 5" midbass when Im designing 2 way boxes. Its very hard to obtain 8" drivers with good mid range response.


vdi_nenna,

About productive answers and clowns, a productive answer is not comment this kind of ********.


Regards
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Old 30th July 2001, 07:40 PM   #10
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BLMN, I wasn't referring to your thread. I was referring to something else; I should have said something then, but I didn't.

And you're right, so I won't say anything about your current lesson on forum conduct to me, especially since you don't know what I'm talking about.

[Edited by vdi_nenna on 07-30-2001 at 02:52 PM]
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