tweeter attenuation on Vifa XT question?

fazman · 31st August 2005, 08:12 PM

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!

K-amps · 31st August 2005, 09:35 PM

Google "L-pad" +calculator and you will find your answer... I think it was llana's calc or something. Good luck.

31st August 2005, 08:12 PM	#1
fazman diyAudio Member Join Date: May 2005 Location: Windsor Ontario	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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31st August 2005, 09:35 PM	#2
K-amps diyAudio Member 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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