Hi Jean
- Maybe your substitution of the 20 ohm & 15 ohm resistors for the (2) 39 ohm resistors was just another "cut & paste error" ( divorced from what you actually bought ). I don't know, you'll have to tell us what you are actually wiring up .
IT IS MY MISTAKE COPY PASTE (...)
- I've also divided out the (2) biased 20 uf caps in the woofer portion of the network . The original N3145 has the original 10uf after the Zoebel (10 uf equates to the 2, 20uf caps placed end to end, in the biased setup ). The 10uf was not expressly included as part of the large capacitance shunting located after the 5.4mH inductor so I wouldn't move its' location. I don't know if this truly makes much of a difference. Maybe someone with some Network SIM software might be able to lend a hand . ??
I assuming the zobel correction is most close as possible in driver for best match inpedence, I keep in my hand the , futile maybe, position is inverse so i decide to put 20Uf before... but I recognize I play in apractice-sorcier
- Were you given explicit directions to combine these two areas of capacitive reactance into one ?
- I have also included the recommended polarity conventions for this N3145 network ( at least for the woofer & midrange driver ). The horn and the tweeter sections use the same polarity as the 2121 midrange. I suggest you stick to this official convention.
you absolutely right I just exposed the electrical polarity not post speaker... I realize the confusion here
- You should print it out, review it, and then figure out "where & why" you have deviated from it ( in a few spots ) . You should do this before firing up your network ( or burying it into sand ) or measuring it's performance or anything else I can think of at the moment .
I have a copy and check check and re-check
in the works 100 comeback.... (...)
MY DEEPER THANKS FOR FOUND THIS ERRATUM... (...)