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23 minutes ago, Crankysoldermeister said:

Two-way?

 

https://www.fullcompass.com/common/files/17291-DH1ASpecSheets.pdf

 

Compare the impedance plots. Notice how similar they look with the exception of where on the plot they are. 
 

Could be a nominal 8 ohm tweeter depending on where the crossover point is. 

Top horn assembly labeled 6 ohm, driver measures 4.

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2 hours ago, CECAA850 said:

That's the company in England I e mailed.

Carl  ,  ask them to quote you the shipping via Royal Mail  /the rates are  lower , Service is about 1 Week -10 days to the USA  -

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12 minutes ago, CECAA850 said:

500 hz  12db slope.


Extrapolating data from the DH1A SPEC sheet, it looks like the impedance at 500Hz is @ 12 Ohms. However, the impedance may be different if you are using a horn that is not an HP9040. 
 

Assuming the impedance of your driver and horn is 12 Ohms the L-Pad chart I posted will not be valid. I’ll have to post another one for 12 Ohms. 

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4 minutes ago, Curious_George said:


Extrapolating data from the DH1A SPEC sheet, it looks like the impedance at 500Hz is @ 12 Ohms. However, the impedance may be different if you are using a horn that is not an HP9040. 
 

Assuming the impedance of your driver and horn is 12 Ohms the L-Pad chart I posted will not be valid. I’ll have to post another one for 12 Ohms. 

I'm using the stock 9040.

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