Quote Originally Posted by Drummerboy2 View Post
Ok, so lets see if I got it.

2420 with 8 Ohm diaphrams (measure 6.0-7 Ohms) remove the 20 Ohm resistor from the network?
2420 with 16 Ohm Diaphrams (measure 12 Ohms) leave the 20 Ohm resistor in?

Does this rule still apply if I want to use the "Super 3145" network?

Thank You for all the help!
If you are referring to measured impedance YES and YES (referring to charge coupled I assume)

The thing to understand is that a multi meter will only give you a dead or alive resistance which is always much lower than the actual AC impedance of the driver. Its only possible to measure the impedance with Clio or the Dayton Dtas or LMS.
JBLs labelling conventions and polarity conventions have always caused confusion so don't stress.