hypex ncore

[aliaswolf]

As promised here are some pictures of my NC400´s in their acrylic housing. These cases were originally build for an xover. That´s why some holes are not properly drilled for the actual use. But it was the best way for me to bring my NCores to life and use them until I get the aluminium cases to build real big mono blocks. I think the NCores deserve that additional investment.
And, yes, the stands suit for my ARC Monos. They are a bit oversized for the actual cases. Waiting for the new cases...

[Paulkouhan]

Hello,

I get my new NCore and SMPS600 on thuesday. I am very happy with the sound.

As I need to lower the gain with my 100dB speakers, I removed R141 this morning.

One of the NC400 has now a problem
When it powers on, the red leds light on as expected and then I have a big "ploc" on the speaker, and another one a few seconds after (I unplugged the power to avoid damage on my speaker ...).
I tried it on my test speakers and it was the same ... the boomer moved a lot a very short time...

The other NC400 works as expected, with lower gain.

I dont know what to do...
I have sent an email to hypex support, I hope to get an answer next week.

[DSP_Geek]

Originally Posted by Paulkouhan

Hello,

I get my new NCore and SMPS600 on thuesday. I am very happy with the sound.

As I need to lower the gain with my 100dB speakers, I removed R141 this morning.

One of the NC400 has now a problem
When it powers on, the red leds light on as expected and then I have a big "ploc" on the speaker, and another one a few seconds after (I unplugged the power to avoid damage on my speaker ...).
I tried it on my test speakers and it was the same ... the boomer moved a lot a very short time...

I would look for a solder bridge between two pads near R141, or perhaps a stray solder ball someplace else. This kind of work definitely wants a magnifying glass or magnifying goggles (which you need on general principles anyhow).

[a.wayne]

Originally Posted by aliaswolf

As promised here are some pictures of my NC400´s in their acrylic housing. These cases were originally build for an xover. That´s why some holes are not properly drilled for the actual use. But it was the best way for me to bring my NCores to life and use them until I get the aluminium cases to build real big mono blocks. I think the NCores deserve that additional investment.
And, yes, the stands suit for my ARC Monos. They are a bit oversized for the actual cases. Waiting for the new cases...

damn , so small , fascinating they work so well.....

[StigErik]

I experienced exactly the same with one of my Ncores after removing R141. I cleaned the board for all solder remains with a toothbrush and the problem was solved.

[dan92075]

Originally Posted by Regnad

I have both amps and would enjoy a visit if someone would like to listen to each...

The NC1200 has more power, right? With low-efficiency speakers couldn't that contribute to a difference (improvement)?

I did think that the NC400 sounded better at the speakers with 6" speaker wires.

Hi Regnad - now I am confused

Do you mean to say that the NC400 with 6" speaker wire outperforms the NC1200 with the longer speaker wire?

I thought you were indicating in an earlier post that the NC1200 sounded better even when using longer speaker wire?

Appreciate if you could clarify - thanks!

[Paulkouhan]

Originally Posted by StigErik

I experienced exactly the same with one of my Ncores after removing R141. I cleaned the board for all solder remains with a toothbrush and the problem was solved.

thank you for your help.
I was thinking the same, but the toothbrush wash did not help.

One of the "pad" of R141 came with the resistor. I dont know if that can be the problem.

I will bring the ncore at work tomorrow, we have all the magnifiing glass we could dream of ...

[ds23man]

I think you have a serious problem..... It is a multilayer board!

[Julf]

Originally Posted by Paulkouhan

One of the "pad" of R141 came with the resistor. I dont know if that can be the problem.

Yes, that is a serious problem. Your nc400 is probably toast, as the pad has probably taken some of the inner layer connections with it.

I had the same thing happen to one of my 8 nCores as a result of rushing the desoldering job...

[ds23man]

Why do people always want to change the gain? If you have high sensitive speakers, put a attenuater between your ncore and preamp!