Nordost QKore grounding unit

[UltraFast69]

For any of these passive components, I think this is exactly what they do. Nothing less, nothing more. Therefore I presume it improves the sound by way of reducing ground load fluctuations when the signal travels through different components.

Hence, I bought 10 awg strands of flexible copper wire and a selection of different types of connectors to connect to an idle input of each component. The other end goes to a 5 kg pure copper bar to give them common ground.

Let’s see what happens [emoji3].


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That’ll be interesting, we wait across an ocean and a country


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[Kuoppis]

My experiment is taking shape with first parts starting to arrive.

First the grounding core. I think at least Cardas is using solid copper in their power product casings, probably for the same reason. Not sure what is inside a Nordost QKore and what metal they use. It is quite heavy though. But I think it is safe to say it is not a more solid copper core.

This is a 5 Kg solid copper bar. Looks nnnice to my eyes at least.

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[Speedskater]

Originally Posted by Speedskater
The basic definition for 'ground' is:
A common reference point.

For any of these passive components, I think this is exactly what they do. Nothing less, nothing more. Therefore I presume it improves the sound by way of reducing ground load fluctuations when the signal travels through different components..............

No actually, just the opposite!
Many of the passive units have just a single terminal and the ones with more terminals, isolate each terminal internally. So there is no common reference point and no path thru the unit back to the AC power system.

* * * * * * * * * *
While the $10 gold grounding block in post #14 would be an excellent 'common reference point' and is the way to go.

 

[Kuoppis]

Many of the passive units have just a single terminal and the ones with more terminals, isolate each terminal internally. So there is no common reference point and no path thru the unit back to the AC power system.

* * * * * * * * * *
While the $10 gold grounding block in post #14 would be an excellent 'common reference point' and is the way to go.

Now we might be talking different things here. I am referring to the QKore6. It’s a passive unit, no connection to the AC power system whatsoever.

The $10 grounding block does just what any similar block would do, i.e. provide a common reference point. As does the copper block.


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[Speedskater]

Well the QKore1 obviously doesn't do anything! it only has one terminal.
Does anyone have access to a QKore6? and be able to measure the resistance from terminal to terminal?

The Stereophile page has some alternate Universe stuff, don't know if it's from the manufacture.

 

[Speedskater]

So I quickly scanned a Nordost QRT page and it had a ton of alternate universe stuff.
They start with a few sentences of engineering text then take it out of context and mis-apply it.

 

[tjbhuler]

I have had the chance to try out 2 types of grounding unit something similar to QKore grounding unit. First is from an Indonesian maker his name is Setiawan, its known as GC8 and second is Alan Maher from USA his grounding unit is known as Iso TG.

For GC8 you can connect that unit to 8 different parts of your equipments (cd player, preamp amp, phono pre and speakers) using either RCA, spade, XLR and i think he makes it even for USB port too. Its an active device meaning you need to hook them to an outlet.

Here's the link :

http://www.sap.or.id/GC8_Home.html

Im still in the midst of trying them out, but so far for now there's some nice improvements im getting lower noise, tighter bass and deeper soundstage. However I find them a bit sterile on the midrange side but its still premature for me to conclude as I got them hooked up only for few days now and there's so many places to try them in my system. I got them in spades and rca version so im slowly trying them at rca output and input for my equipments.

On the other hand I have had Alan Maher Iso Tg for 3 months now, they are passive devise and can be hooked to only 1 equipment using either RCA, XLR and spade. I got them in RCA version. Now the Iso TG has only given me good positive results in my system. Amazing resolution, lower noise floor, expansive sound stage, superb bass detail and extension. The midrange some what more liquid sounding and highs are more detailed. Im trying to find the right words for them so hopefully it makes sense lol.

Either way these grounding devices are giving me nice improvements for my setup. As for the price GC8 is going for $275 per unit (this is what attracted me immediately) and Iso TG is going for $950.

Another one to check out is RTZ grounding box. I haven't tried them, only have been reading about them and been reading good positive reviews on them in another forum.

Heres the link

http://theaudiostandard.net/thread/4439/rtz-grounding-box.

There many grounding units coming out from many companies and individuals. Making it an interesting topic to look at in this hobby .

 

[UltraFast69]

I have had the chance to try out 2 types of grounding unit something similar to QKore grounding unit. First is from an Indonesian maker his name is Setiawan, its known as GC8 and second is Alan Maher from USA his grounding unit is known as Iso TG.

For GC8 you can connect that unit to 8 different parts of your equipments (cd player, preamp amp, phono pre and speakers) using either RCA, spade, XLR and i think he makes it even for USB port too. .

Not familiar with either brand, but in either case do not try to ground your speakers!


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[Speedskater]

I'm not at all sure what the Setiawan does!
He writes about correcting voltage at a point. But voltage doesn't exist at at point. It's the difference in potential between two points.
So if the common reference point is one of the points, what is the other point.
And in and near AC power systems, it's current flow from point to point that creates the voltage drop.

 

[Speedskater]

Not familiar with either brand, but in either case do not try to ground your speakers!

and don't ground RCA chassis connectors that have plastic insulator rings.
and don't ground a double insulated chassis. It would have a square within a square safety symbol.

 

[Kuoppis]

Here’s another one: CAD GC1 and GC3.

https://www.computeraudiodesign.com/gc1-ground-control/

http://www.theaudiobeat.com/blog/cad_gc1_gc3.htm


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[Kuoppis]

Next step in my experiment: Pliers, 10 AWG insulated pure copper wire, different types of connectors, copper o-rings, copper screws, drill bit, sorbothane feet.

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[SoundRebels]

Yesterday we finished our Nordost QKORE6 tests

and I know, that price is a little bit crazy, but ... We just love the improvements which Nordost made in our systems.

 

[Kuoppis]

Yeah, well, my polish is not that good really [emoji3].


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[SoundRebels]

Yeah, well, my polish is not that good really [emoji3].


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Chrome built in translator could help

 

[Kuoppis]

Chrome built in translator could help

Yes, or google translate for that matter...

Too much gibberish and too inconvenient to read for my liking.


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[Speedskater]

It's a real challenge for a translator program to deal with mis-used technical words.

 

[SoundRebels]

If Nordost or Polish distributor order English translation I'll inform You asap.

 

[Elberoth]

I need to borrow one and take it apart.

 

[audio.bill]

I need to borrow one and take it apart.

Good luck with that, I recall reading that the internal components are potted which is pretty common in such devices. You may be able to see some internal wiring but not much else without destroying the unit in the process.