Time for a change??

Polarbear posted:
Michael posted:
Polarbear posted:
Michael posted:

Nigel, I and a couple of friends (J.N. and Dark Bear) have found it beneficial to place the NAP500 one single level up from the base level rather than having it sitting on the base level. Is this something you have tried at all?

Hi Michael, the honest answer is no I haven't tried lifting the 500 head unit. Can I ask what you have below your 500?  Is it a spare tier or do you have a black box there?

 

It is something I could consider, the question is going to be the cable dressing issue, the boxes are where they are now to get the best cable dressing.

I have my Linn Radikal under my 500 on the base level, I believe John has his 555PS under his. (John correct me if I am wrong).

So we have from top to bottom, left: CD555, 555PS-DR, NDX, 555PS-DR, centre: 552, 500-DR, Radikal, right: LP12, empty, 500PS, 552PS-DR with a Super Lumina full loom into my NBLs.

 

Interesting Michael, you have the spare tier below the LP12 and not the CD555, also how do you find the cable dressing with the 555 PSU directly under the head units, can you get a decent hang on the Burndies? 

Nigel, at present both my 555PS supplies are connected to my CD555 and the burndies hang fine neither touching the floor. If and when I replace the NDX, which is at present self powered, with the ND555 I shall most likely go back to running the CD555 of one supply and use the other to power the ND555. If the ND555 proves to be substantially better running of two supplies, I have that option.

Michael posted:
Polarbear posted:
Michael posted:
Polarbear posted:
Michael posted:

Nigel, I and a couple of friends (J.N. and Dark Bear) have found it beneficial to place the NAP500 one single level up from the base level rather than having it sitting on the base level. Is this something you have tried at all?

Hi Michael, the honest answer is no I haven't tried lifting the 500 head unit. Can I ask what you have below your 500?  Is it a spare tier or do you have a black box there?

 

It is something I could consider, the question is going to be the cable dressing issue, the boxes are where they are now to get the best cable dressing.

I have my Linn Radikal under my 500 on the base level, I believe John has his 555PS under his. (John correct me if I am wrong).

So we have from top to bottom, left: CD555, 555PS-DR, NDX, 555PS-DR, centre: 552, 500-DR, Radikal, right: LP12, empty, 500PS, 552PS-DR with a Super Lumina full loom into my NBLs.

 

Interesting Michael, you have the spare tier below the LP12 and not the CD555, also how do you find the cable dressing with the 555 PSU directly under the head units, can you get a decent hang on the Burndies? 

Nigel, at present both my 555PS supplies are connected to my CD555 and the burndies hang fine neither touching the floor. If and when I replace the NDX, which is at present self powered, with the ND555 I shall most likely go back to running the CD555 of one supply and use the other to power the ND555. If the ND555 proves to be substantially better running of two supplies, I have that option.

I tried the two 555PSU's when it was first mentioned and it made the CD555 sound too mechanical and analytical for me. I prefer the more organic sound of the single 555PSU, I wonder if this will be the same with the ND555?  Roll on the dealers open days.

Idle curiosity on my part but... 

I’m sure there’s something wrong with this idea but if you have a 555 and an NDS both needing two feeds from a 555ps but you have two they could either have one each or they could both potentially use one output of each supply, on the assumption you wouldn’t play both at the same time they’d each get a bigger share of the two supplies when they are used. set the NDS to floating of course. Has anyone been brave enough or asked Naim for that matter?

yeti42 posted:

Idle curiosity on my part but... 

I’m sure there’s something wrong with this idea but if you have a 555 and an NDS both needing two feeds from a 555ps but you have two they could either have one each or they could both potentially use one output of each supply, on the assumption you wouldn’t play both at the same time they’d each get a bigger share of the two supplies when they are used. set the NDS to floating of course. Has anyone been brave enough or asked Naim for that matter?

That’s an interesting thought and it hadn’t crossed my mind. I would be very interested to know whether that is both possible and advisable!

yeti42 posted:

Idle curiosity on my part but... 

I’m sure there’s something wrong with this idea but if you have a 555 and an NDS both needing two feeds from a 555ps but you have two they could either have one each or they could both potentially use one output of each supply, on the assumption you wouldn’t play both at the same time they’d each get a bigger share of the two supplies when they are used. set the NDS to floating of course. Has anyone been brave enough or asked Naim for that matter?

Interesting, are you suggesting using the two PSU's on the CD555 and then swapping to the ND 555 when you want to stream?  

 

Sounds a lot of faffing if you ask me?

When you use two 555ps on a 555 you use socket one from one of them and socket two from the other if I understand correctly, this leaves the other sockets, two and one respectively unused and maybe they can be connected to an NDS. There may be an earthing drawback to this but the NDS can float so maybe not. You won’t use 555 and NDS at the same time so only idle currents will feed the unplaying device leaving the playing device to use more of the transformers primaries. It won’t be the same as two feeding one but might give more than two times one feeding one. I’m not advocating this as I’ve no knowledge of its effect but wonder if it’s been tried?

yeti42 posted:

When you use two 555ps on a 555 you use socket one from one of them and socket two from the other if I understand correctly, this leaves the other sockets, two and one respectively unused and maybe they can be connected to an NDS. There may be an earthing drawback to this but the NDS can float so maybe not. You won’t use 555 and NDS at the same time so only idle currents will feed the unplaying device leaving the playing device to use more of the transformers primaries. It won’t be the same as two feeding one but might give more than two times one feeding one. I’m not advocating this as I’ve no knowledge of its effect but wonder if it’s been tried?

Good luck with the cable dressing on that one!

ChrisSU posted:
yeti42 posted:

When you use two 555ps on a 555 you use socket one from one of them and socket two from the other if I understand correctly, this leaves the other sockets, two and one respectively unused and maybe they can be connected to an NDS. There may be an earthing drawback to this but the NDS can float so maybe not. You won’t use 555 and NDS at the same time so only idle currents will feed the unplaying device leaving the playing device to use more of the transformers primaries. It won’t be the same as two feeding one but might give more than two times one feeding one. I’m not advocating this as I’ve no knowledge of its effect but wonder if it’s been tried?

Good luck with the cable dressing on that one!

yeti42 posted:

When you use two 555ps on a 555 you use socket one from one of them and socket two from the other if I understand correctly, this leaves the other sockets, two and one respectively unused and maybe they can be connected to an NDS. There may be an earthing drawback to this but the NDS can float so maybe not. You won’t use 555 and NDS at the same time so only idle currents will feed the unplaying device leaving the playing device to use more of the transformers primaries. It won’t be the same as two feeding one but might give more than two times one feeding one. I’m not advocating this as I’ve no knowledge of its effect but wonder if it’s been tried?

Any updated thoughts on this idea from yeti42?

And here we have it:

Hi,

 

Technically it would work however I couldn't possibly recommend it as the power supplies would then be having to isolate and sink the electrical noise from two devices rather than one and although the audio signal ground can be floated on the NDS then the combination of multiple devices with multiple power ground paths through to multiple power supplies would really leave the doors open to some interesting (and possibly quite nasty) ground loop effects.

 

Best Regards

 

Phil Harris  

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