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Old 13th April 2013, 06:17 PM   #6701
Larsas is offline Larsas  Sweden
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Where's your connection to pin 3 on the XLR?
Pin 1 & 2 seems fine. See nc400 Datasheet page 12.
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Old 13th April 2013, 06:26 PM   #6702
Larsas is offline Larsas  Sweden
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On second thought looking at your photo, are you sure you haven't mixed up pin 1 & 2?
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Old 13th April 2013, 07:10 PM   #6703
cjf is offline cjf  United States
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Hello, I have the blue wire of the XLR cable going to PIN2 and the white wire going to PIN3 which is what page 12 in the data sheet appears to be depicting in the drawing. Or, am I mistaken in that assumption?
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Old 13th April 2013, 08:31 PM   #6704
Larsas is offline Larsas  Sweden
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Hi,

If I interpret your photo 0765.jpg correct I can't see any wire connected to pin 3. Assuming you have female XLR connectors pin layout seen from rear looks as below, see link.
- - > 3 Pin XLR Wiring Diagram toffer.com

When building my nCore monoblocks I made a mistake soldering the XLR connector (mixed pins) and had similar problem as you describe, see my amps here (LarsSt):

- - > Hypex NCore question and answers
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Old 14th April 2013, 02:17 AM   #6705
cjf is offline cjf  United States
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Update,

I have been successfully running the second dual-mono amp since last evening without issue. This amp is a mirror build of the first one that had an issue with the one NC400 module. If nothing else, at least this tells me that the wiring/layout is correct and the most likely cause of my previous issue is too aggressive OCP setting as Julf made mention to.

So I guess I'm off to RMA land and will be contacting Hypex.

At least I have one amp pair to keep me occupied for now. These are impressive sounding amps thus far! Can't wait to hear what 4 of them will sound like on my B&W 803di2

Thanks again to all for your assistance
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Old 15th April 2013, 12:22 AM   #6706
troystg is offline troystg  United States
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Best of luck and the ncore pairs very well with the B&Ws so it should make for a great setup.
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Old 17th April 2013, 06:12 PM   #6707
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Old 18th April 2013, 04:48 AM   #6708
Regnad is offline Regnad  United States
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Those "quotes" seem a bit unusual for amp promotion purposes.
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Old 18th April 2013, 11:47 AM   #6709
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Hi,
Is it possible to run three ncores from one (remote) PSU? I am looking at going full active with my speakers, but can only just squeeze three ncores into my Hexateq enclosures. I am thinking of putting an SMPS into a seperate box and running a nice thick 8-core cable to the amp.

I know that up to two NC400 per SMPS600 is recommended, but in this case one amp would only be driving a few watts into a tweeter, and the mid range on my speakers is 16ohms, so that would also be a nice easy load.

Any suggestions?

Kind regards,
Edward
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Old 18th April 2013, 01:16 PM   #6710
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Quote:
Originally Posted by mcai7et2 View Post
Hi,
Is it possible to run three ncores from one (remote) PSU? I am looking at going full active with my speakers, but can only just squeeze three ncores into my Hexateq enclosures. I am thinking of putting an SMPS into a seperate box and running a nice thick 8-core cable to the amp.

I know that up to two NC400 per SMPS600 is recommended, but in this case one amp would only be driving a few watts into a tweeter, and the mid range on my speakers is 16ohms, so that would also be a nice easy load.

Any suggestions?

Kind regards,
Edward
My guess would be that power should not be a problem in your case.

My concern would rather be the length of the DC power line with which you will connect the smps to the ncores.

Many other amps prove sensitive to (amongst other parameters) the added inductance of long DC supply lines.
(don't know specifically about the scores though...)

-So you should probably try to keep the DC supply lines as short as possible or experiment with some local decoupling at the amp modules...

Best,

Last edited by Juhleren; 18th April 2013 at 01:19 PM.
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