Hypex Ncore

[DeJ]

Help please with my build.

The Mogami cable... White goes to #3, Blue to #2, #1 goes to chassis ground.

Here is where I need help. The braided shield goes to the same ground point as where #1 ground to chassis is located?

--Also there is a thin black cable on the mogami...it goes where, what is it for?

Thanks!

 

[OllBoll]

Help please with my build.

The Mogami cable... White goes to #3, Blue to #2, #1 goes to chassis ground.

Here is where I need help. The braided shield goes to the same ground point as where #1 ground to chassis is located?

--Also there is a thin black cable on the mogami...it goes where, what is it for?

Thanks!

Then thin black cable is the nAmpOn, which when connected to the ground turns the amp on. Useful if you want to have an external amp poweron/off trigger but if not then it's easiest to just connect directly to ground.

 

[ufokillerz]

Then thin black cable is the nAmpOn, which when connected to the ground turns the amp on. Useful if you want to have an external amp poweron/off trigger but if not then it's easiest to just connect directly to ground.

The thin black wire when grounded will unmute the amplifier, it is not used for power on/off, just for mute/unmute

 

[DeJ]

Ok thanks. The xlr has it's own ground pin in addition to pins 1,2,and 3. Should I connect it to chassis?

 

[Julf]

Ok thanks. The xlr has it's own ground pin in addition to pins 1,2,and 3. Should I connect it to chassis?

It doesn't really matter. If the xlr connector is metal, the connector casing (that the ground lead connects to) is probably touching your chassis anyway...

 

[DeJ]

Ok, so the way I'm thinking about doing it now is.

Pin #1 is soldered to the cable shielding and from pin #1 an additional cable goes to the chassis. Sound correct?

 

[Julf]

Pin #1 is soldered to the cable shielding and from pin #1 an additional cable goes to the chassis. Sound correct?

Yes - just keep the cable from pin1 to chassis very short. Best would be to have a chassis connection point that you would connect both the cable shield and pin #1 to.

 

[DeJ]

Or will this work too? Is this the same thing? Pin #1 is connected to the cable shielding. And the additional ground pin on the xlr goes to the chassis.

 

[Julf]

Or will this work too? Is this the same thing? Pin #1 is connected to the cable shielding. And the additional ground pin on the xlr goes to the chassis.

Then you should connect pin #1 to the ground pin or chassis too.

 

[DeJ]

Ok thanks, I'm almost clear on this, thank you.

You said, "Best would be to have a chassis connection point that you would connect both the cable shield and pin #1 to."

Do you mean the cable shielding is not connected to pin #1 but is connected the the chassis? And then a cable is run from the chassis to pin #1?

 

[Julf]

Do you mean the cable shielding is not connected to pin #1 but is connected the the chassis? And then a cable is run from the chassis to pin #1?

Yes - have a look at page 12 of the NC400 data sheet.

 

[DeJ]

Ok now I get it...although on page 12 they have 2 different chassis connection points. So I can have the nAmpOn, Pin #1 and cable shielding all go to the same chassis point? No difference is sound quality or any other unforeseen reason? Thanks.

 

[Julf]

Ok now I get it...although on page 12 they have 2 different chassis connection points. So I can have the nAmpOn, Pin #1 and cable shielding all go to the same chassis point? No difference is sound quality or any other unforeseen reason? Thanks.

No, one point should be just as good. Just remember to keep the lead between pin 1 and chassis as short and straight as possible.

 

[DeJ]

Great, thank you Julf!

 

[DeJ]

Oh forgot, one more question. I plan on grounding the IEC power inlet to the chassis but in a different location from the xlr chassis ground. Is that the optimum way of doing it? Looking for the best sonic solution.

 

[Julf]

Oh forgot, one more question. I plan on grounding the IEC power inlet to the chassis but in a different location from the xlr chassis ground. Is that the optimum way of doing it? Looking for the best sonic solution.

As long as your chassis is of metal it won't make a difference - but it is better than using a long lead that curves around inside the chassis.

 

[DeJ]

You say to "keep the lead between pin 1 and chassis as short and straight as possible."

Are there any considerations on the cable itself? A stranded wire, a single solid core wire, shielded wire, etc?

 

[Rajapruk]

Ok thanks. The xlr has it's own ground pin in addition to pins 1,2,and 3. Should I connect it to chassis?

Why don't you RTFM?

 

[Julf]

Are there any considerations on the cable itself? A stranded wire, a single solid core wire, shielded wire, etc?

No need for shielding - anything with a reasonably low resistance and inductance will do.

 

[Speedskater]

For connecting XLR chassis connectors, the wire from pin #1 short. What is short? About 1 inch or 2 cm. The XLR shell is also connected to the chassis. In pro audio and broadcasting, the XLR inline cable connector is not connected to the cable shield. The thinking for this is the the shell could easily come in contact with something metal that's not at the audio system ground potential.

The IEC power inlet should also be connected to the chassis with a short wire. Short in this situation is a little bit longer. Maybe 2 inches or 5 cm.

Because the XLR chassis connectors and the IEC power inlet are never close together, the chassis connections are not close to each other either.

Remember the the XLR pin #1 is a shield connection it is not part of the audio ground system.