hypex ncore

[Julf]

Originally Posted by ds23man

But what is wrong with an att. network before the driver?

Apart from screwing up the damping factor? Nothing.

[Julf]

Originally Posted by OllBoll

An even easier (and much more safe one) would be to just use an L-pad attenuator before the NCore. Not as ideal but in the real world it shouldn't matter.

Well, in the case of pos, who I think said he could hear hiss out of the nc400, it might matter to some degree.

[StigErik]

Originally Posted by OllBoll

An easy way to remove R141:

First splatter the top and both sides of the resistor with some solder.

Then heat both sides at the same time by laying the soldering iron and when heated just push the resistor away, or push it off with a tweezer.

As I have said before - splatter the ENTIRE resistor with solder, and it will just follow the solder iron when you remove it. Very very simple, and with low risk.

[Julf]

Originally Posted by StigErik

As I have said before - splatter the ENTIRE resistor with solder, and it will just follow the solder iron when you remove it. Very very simple, and with low risk.

Agree.

Now for a more interesting one - advice for replacing (instead of removing) R141, for someone who wants a resistor, but with a different value?

[Paulkouhan]

Originally Posted by ds23man

Then you should use a nice 20 watt class A amp for a 113db driver

I came from a 8W class A ...
The ncore is definitely better

Originally Posted by OllBoll

just push the resistor away

no, trust me dont push the resistor

what is the iron temperature to use ? 300°C ?

[Telstar]

Originally Posted by StigErik

As I have said before - splatter the ENTIRE resistor with solder, and it will just follow the solder iron when you remove it. Very very simple, and with low risk.

This is good advice

[mike_mcf]

Originally Posted by ds23man

Then you should use a nice 20 watt class A amp for a 113db driver

If I had a 113db driver then I would use 2W tube amp.

[StigErik]

Or even less. I need only 20W peak with my 88 dB ribbons. In that sense, Ncore is 10x overkill power-wise.

[mr_push_pull]

I'm sorry but I don't get it. that resistor is at the edge of the board which should make things easier. and one can practice on a scrapped board. and how in the world is taking a dremel close to the NCORE safer than using a soldering iron? I have worked with surface mount parts, not much but enough to tell you it can be done and I don't have the steadiest hand (due to alcohol and hard drugs abuse, joking) or the best vision (wearing glasses since I was 4) and I managed to do it fine.

[DSP_Geek]

Originally Posted by Julf

Apart from screwing up the damping factor? Nothing.

On the other hand, some drivers do better with higher source impedance, as per Hawksford in his article on current drive.