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tweeter attenuation on Vifa XT question?
tweeter attenuation on Vifa XT question?
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Old 31st August 2005, 08:12 PM   #1
fazman is offline fazman  Canada
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Join Date: May 2005
Location: Windsor Ontario
Default tweeter attenuation on Vifa XT question?

Have a pair of Onix Rocket 750 Signatures with Vifa XT 4 ohm tweets.
I'd like to adjust the tweeter level output a bit but not sure on the values.
High pass consists of a third order network, an L-pad attenuation network , and an LCR impedance flattening network.
The resistor values are as follows. R1 = 3 ohms (series)and R2 = 5 ohms (parallel)
I assume the 5 ohm resistor was used to shunt some higher frequency info out from the tweeter and the 3 ohm resistor was used to adjust the total output of the tweeter correct???
How would I increase the tweeter's total output by 1 or 1.5 db without disturbing the intentional roll off?
I tried by changing R1 to 2.4 instead of 3 and left R2 (5 ohms) the same but this didn't give me my desired result. Some HELP PLEASE!
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Old 31st August 2005, 09:35 PM   #2
K-amps is offline K-amps  United States
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Join Date: Nov 2003
Location: Indiana
Google "L-pad" +calculator and you will find your answer... I think it was llana's calc or something. Good luck.
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