R net Question

[kg1961]

I just got some xover point from Joerg. when I installed them in my Ax406a I notice there is a extra set of pin or one set to many.
My question is let say the rnet is set at 85hz with out using the last set of pins will it stay at 85hz or a differnt xover point?
anyone that know let me

[dwnrodeo]

According to the Ax406a manual, "You may also use the newer 16-pin R-Nets, by utilizing only 14 of the 16 pins. The crossover frequencies will be roughly the same, although it is recommended to measure the resistance to find the exact crossover frequency."

[kg1961]

so how would I measure that?

[dwnrodeo]

I would measure the resistance across one of the resistors in your R-Net.

The formula for finding the resistance for a 16 pin R-Net is: (18150/Desired Frequency) = R(kilo-ohm)

The formula for finding the resistance for a 14 pin R-Net is: (18800/Desired Frequency) = R(kilo-ohm)

So if you wanted to find the frequency of your R-Net using only 14 of the 16 pins, you would take 18800 and divide it by the resistance you measured on one of your resistors.

For example: If you measured 94,000 ohms across one resistor, then you would take 18800/94(kilo-ohms)= 200 Hz.

[kg1961]

yes my problem is the resistor are like the pg factory one they are sealed so I really can't
how much would the 85 hz change if its only using the 14 pins?

[dwnrodeo]

Instead of 85 hz it will be about 88 hz.

If you want to know additional values of 16 pin R-Nets, just multiply your frequency * 1.0358 to get the crossover frequency of your 14 pin R-Net. BTW, 1.0358 is the ratio of (18800/18150).

[kg1961]

thanks again
I can live with that I was just worried if it was like 100 or up
thanks again
I will do the math on the 3200 point I have for the tweeter also
so it will just be a little higher right? so about 3300

[dwnrodeo]

Yep, around 3315 Hz.