Russ Andrews suggested wiring for Hi Cap
Posted by: Jeremy Roebuck on 29 September 2002
Mr A recommends not passing the signal through the hi-cap. i.e. power goes from hi-cap to pre amp, signal goes from pre amp to power amp. Instinctively keeping power (albeit low voltage) and signal separate seems sensible but surely Naim didn't just do it to save a length of cable.
Views & experience, please??
Jeremy
Views & experience, please??
Jeremy
Posted on: 29 September 2002 by Richard Paget
Less cable for the signal to go through seems sensible doesn't it but its all to do with Star earthing and earth loops--something Naim go to extrordinary lengths to avoid
regards Richard
regards Richard
Posted on: 29 September 2002 by Manu
From the Q&A section of the Naim site:
Why are signals routed from the pre-amp through the SUPER-CAP, HI-CAP or FLAT-CAP to the power amp, rather than directly from the pre-amp to the power amp?
The absolute earth reference for the system is the reference for the pre-amp, which is the SUPER-CAP, HI-CAP or FLAT-CAP earth. The signal is routed from the pre-amp to the power supply using the same interconnect that takes the power feed from the power supply to the pre-amp. It also connects the two earths together.
This minimises differential voltages caused by interfering electric or magnetic fields being generated between the power feed, signal and earth, so maintaining the correct relationship between signal and earth inside the power supply. The power amp is connected to the properly referenced signal at the power supply output.
Emmanuel
All opinions are my own, and reflect those of the organisation i work for, even if not stipulated.
Why are signals routed from the pre-amp through the SUPER-CAP, HI-CAP or FLAT-CAP to the power amp, rather than directly from the pre-amp to the power amp?
The absolute earth reference for the system is the reference for the pre-amp, which is the SUPER-CAP, HI-CAP or FLAT-CAP earth. The signal is routed from the pre-amp to the power supply using the same interconnect that takes the power feed from the power supply to the pre-amp. It also connects the two earths together.
This minimises differential voltages caused by interfering electric or magnetic fields being generated between the power feed, signal and earth, so maintaining the correct relationship between signal and earth inside the power supply. The power amp is connected to the properly referenced signal at the power supply output.
Emmanuel
All opinions are my own, and reflect those of the organisation i work for, even if not stipulated.
Posted on: 30 September 2002 by Martin Payne
quote:
Originally posted by Manu:
The absolute earth reference for the system is the reference for the pre-amp, which is the SUPER-CAP, HI-CAP or FLAT-CAP earth.
Manu,
actually, I think that's wrong.
The reference is from a source (LP binding post, or CD).
cheers, Martin
Posted on: 30 September 2002 by Manu
That's two different things:
The signal ground starting point (star grounding) is the preamp power supply. The preamp is the center point of the system for signal.
This ground star has to be tied to mother earth at some point, not necessary the center. Naim choses to do it at the source. That's a logical choice: you have only 1 CDP, but you can have multiple PSUs (this earthing must be unique).
Emmanuel
All opinions are my own, and reflect those of the organisation i work for, even if not stipulated.
The signal ground starting point (star grounding) is the preamp power supply. The preamp is the center point of the system for signal.
This ground star has to be tied to mother earth at some point, not necessary the center. Naim choses to do it at the source. That's a logical choice: you have only 1 CDP, but you can have multiple PSUs (this earthing must be unique).
Emmanuel
All opinions are my own, and reflect those of the organisation i work for, even if not stipulated.
Posted on: 30 September 2002 by HansW
Manu
I have two sources, a LP12/Armageddon and a Naim CDS1 (which was added at a later date without any special earthing considerations).
Does this mean that I have two earthed sources and is this a problem?
I would be grateful for your comments.
Hans
I have two sources, a LP12/Armageddon and a Naim CDS1 (which was added at a later date without any special earthing considerations).
Does this mean that I have two earthed sources and is this a problem?
I would be grateful for your comments.
Hans
Posted on: 30 September 2002 by Manu
Yes it can be a problem.
See the numerous posts on the subject on this forum.
It appears each one has solve the problem in his own way.
Do you have hum from your speakers when no music is playing?
If not, you have no problem, if yes, see your dealer.
Sorry not to give more solutions, it depends on many factor. I can't help you on line (if you need help).
Emmanuel
All opinions are my own, and reflect those of the organisation i work for, even if not stipulated.
See the numerous posts on the subject on this forum.
It appears each one has solve the problem in his own way.
Do you have hum from your speakers when no music is playing?
If not, you have no problem, if yes, see your dealer.
Sorry not to give more solutions, it depends on many factor. I can't help you on line (if you need help).
Emmanuel
All opinions are my own, and reflect those of the organisation i work for, even if not stipulated.