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#1
Posted to rec.audio.high-end
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Is there a x-over design for 16 ohm woofer and 8 ohm tweeter?
I have an EV aristocrat enclosure and I want to add a horn tweeter but
the woofer is 16 ohms and the choice of tweeters in 16 ohms is limited. I don't want to go to the expense of finding a 16 ohm EV horn driver as this is a "basement" unit. I've looked at a lot of posts regarding x-overs and haven't found a "formula" for mixing impedances. Suggestions? |
#2
Posted to rec.audio.high-end
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Is there a x-over design for 16 ohm woofer and 8 ohm tweeter?
On Jan 3, 1:55 pm, powerdoc wrote:
I have an EV aristocrat enclosure and I want to add a horn tweeter but the woofer is 16 ohms and the choice of tweeters in 16 ohms is limited. I don't want to go to the expense of finding a 16 ohm EV horn driver as this is a "basement" unit. I've looked at a lot of posts regarding x-overs and haven't found a "formula" for mixing impedances. That's because none is necessary. Especially in the case of parallel passive ladder networks (which the vast majority of crossovers are), each driver's impedance is relevant ONLY for the portion of that crossover feeding that driver. This is true assuming the you're going to be driving the entire system from the typical amplifier, ie.e, one whose output impedance is substantially lower than any of the impedances presented by the drivers and their respective crossovers. The technique is simple and straightforward: Use the load impedance of the woofer to select the woofer crossover component values, and use the impedance of the tweeter to select the tweeter crossover component values. Now, having said that, regardless of whether the "rated" impedance of each is 4 ohms, 8 ohms, 16 ohms or a bazillion ohms, be aware of the fact that the REAL impedance of each driver is likely to be something else entirely. Adjusting the crossover for different tweeter and woofer impedances is easy. The hard part is because the actual impedance of ANY driver, for the purposes of crossover design, is very different than the rated impedance. |
#3
Posted to rec.audio.high-end
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Is there a x-over design for 16 ohm woofer and 8 ohm tweeter?
Well, I basically solved my own problem: I found a 16 ohm horn and
driver on the 'bay. Now I don't have to build my own x-over and can use a commercially built one. Appreciate the help; may still use a program I found which calculates x-over values based on impedance. |
#4
Posted to rec.audio.high-end
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Is there a x-over design for 16 ohm woofer and 8 ohm tweeter?
On 4 Jan 2009 15:56:47 GMT, powerdoc wrote:
Well, I basically solved my own problem: I found a 16 ohm horn and driver on the 'bay. Now I don't have to build my own x-over and can use a commercially built one. Appreciate the help; may still use a program I found which calculates x-over values based on impedance. Of course, you realize that all commercial crossovers, unless built specifically for the exact drivers you have, are based on assumptions that the drivers are purely resistive and linear. Thus, no off-the-shelf crossover will give as good performance as a custom built one. Kal |
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