BillFitzmaurice.info

Hi all,

First of all: I am from Spain, so condolences to those who're gonna read my rudimentary english.

I am having a headache trying to figure out how to do the wiring. I have read several times Bill's instructions and tried to make a wiring diagram in order to have all the information clear.
Since nobody happens to be asking about this in the forum, I assume I'm a little bit dumb. So if anyone will help me, please, I beg you to speak to me as if you spoke to a 5 years old boy.

My cohice is to make one Jack112, with the idea of making a second Jack112 in the future, therefore, the desired wiring option from the Instructions is "PA Top with pass through".

1st doubt:
The wiring detail of the "Neutrik" website says that 2+ and 2- are in a reverse location when compared to Bill's instructions. (see pic)

2nd doubt:
How does the input signal go from pole 1+ to pole 2+? Does the Neutrik Speakon have internal bridges? (see pic)

3th doubt:
When choosing the Coil, instructions say: DC Resistance must be less than 5% of load impedance.
The load impedance is calculated with the impedance of Amplifier, right?
If I have a Eden TN501, it's always 4 Ohms, however its connected to either one or two cabs, correct?

Thanks you all.

If this is for bass guitar use, there is no need to use the pass-thru wiring. Just use 1+ and 1-. That goes to the crossover. The pass through is for using one 4 wire cable to run both the Jack and a sub.

Thanks Bruce Weldy, it was fast!

Do you mean this, right? (see pic)

Yes that's right. This is an internal daisy chain.

alberto wrote: ↑Thu Apr 28, 2022 10:41 am 3th doubt:
When choosing the Coil, instructions say: DC Resistance must be less than 5% of load impedance.
The load impedance is calculated with the impedance of Amplifier, right?
If I have a Eden TN501, it's always 4 Ohms, however its connected to either one or two cabs, correct?

I believe that's meant to be simply based on the rated nominal impedance of the driver. Or, in the case of cabs with multiple drivers, the calculated load based on the drivers nominal impedance.

alberto wrote: ↑Thu Apr 28, 2022 10:41 am The load impedance is calculated with the impedance of Amplifier, right?

The amp does not have impedance, speakers do. If the amp has an impedance tag on the back it's the minimum total speaker impedance that may be used with it.

alberto wrote: ↑Thu Apr 28, 2022 11:16 am Thanks Bruce Weldy, it was fast!

Do you mean this, right? (see pic)

Si

Similar question. Building a J12 for a friend primarily for bass guitar, but trying to make it more flexible and able to use it as a PA also. In this case should i use the “PA top with passthru”? He has a hartke TX300 which uses +1-1 Should i keep it simple, ie bass only?
Thx

Mikesummers wrote: ↑Thu Aug 28, 2025 12:31 am Similar question. Building a J12 for a friend primarily for bass guitar, but trying to make it more flexible and able to use it as a PA also. In this case should i use the “PA top with passthru”? He has a hartke TX300 which uses +1-1 Should i keep it simple, ie bass only?
Thx

Use 1+ and 1-. Parallel the connectors on the jack plate.