View Full Version : A7-500 Dividing Network/Crossover

Monte Verdi
03-03-2009, 08:09 AM
Hello, I would like to say I am glad to be here amongst those of like minds.http://www.hostboard.com/forums/images/smilies/smile.gif I am a new member of this forum and have questions about the crossover in my A7's.

1. What are the capacitor values in the N500D dividing network/ crossover?
Mine are ganged in a creme colored box and tarred. :http://www.hostboard.com/forums/images/smilies/eek.gif

Drivers are 16 ohm 802D and 416A.
Any reccomendations on caps are welcome, I was thinking of experimenting with Mundorfs, Russian Pio or Teflon.



Monte Verdi
03-12-2009, 09:42 AM
:) Help from Serenechaos on DIY forum came up with the following equation.

first order 500hz xover for 16 ohm would be ~5.09 mHy coil & 19.89 (20) uF cap
L1 (mHy) = (1000 x Impedance) / (6.283 x Crossover Frequency)
C1 (fd) = 1,000,000 / (6.283 x Impedance x Crossover Frequency)

if it is first order, and is 500hz, that's what's in there.
or take it out & measure it.

I'd by-pass a piece at a time & listen though.

bad caps or inductors would sound bad, yes.
some things may not sound "like Altec."

Thanks, Robert!