US Audio MartUS Audio Mart
It is currently Fri Apr 20, 2018 8:08 pm

All times are UTC - 8 hours




Post new topic Reply to topic  [ 3193 posts ]  Go to page Previous  1 ... 209, 210, 211, 212, 213
Author Message
PostPosted: Mon Apr 16, 2018 7:18 am 
Offline

Joined: Sat Nov 07, 2009 6:45 am
Posts: 93
Location: kitchener, ON, CA
Tubelover2 wrote:
So here is the office DC chain: LPS 8.5VDC>LT3045 7.1VDC>PoE DC to Ethernet passive adapter>BJC UTP CAT6a 1M>PoE DC to Ethernet passive adapter>LT3045 5VDC>Star quad silver teflon 6in shielded cable>LKS USB-100
Attachment:
IMG_1101.JPG


I would like to try the Supra CAT8 between the LEX and REX as well. It has received good reviews as a data cable.

Cheers!

Forgive my stupidity, but I'm really trying hard to understand this!
Is all this new "PoE chain" for improving the DC cable ONLY and has nothing to do with the actual Ethernet (in our case) or with the connection between REX-LEX?


Top
 Profile  
Reply with quote  
PostPosted: Mon Apr 16, 2018 7:27 am 
Offline
User avatar

Joined: Fri Aug 16, 2013 8:23 am
Posts: 1739
Location: Seattle, WA, US
sima66 wrote:
Tubelover2 wrote:
So here is the office DC chain: LPS 8.5VDC>LT3045 7.1VDC>PoE DC to Ethernet passive adapter>BJC UTP CAT6a 1M>PoE DC to Ethernet passive adapter>LT3045 5VDC>Star quad silver teflon 6in shielded cable>LKS USB-100
Attachment:
IMG_1101.JPG


I would like to try the Supra CAT8 between the LEX and REX as well. It has received good reviews as a data cable.

Cheers!

Forgive my stupidity, but I'm really trying hard to understand this!
Is all this new "PoE chain" for improving the DC cable ONLY and has nothing to do with the actual Ethernet (in our case) or with the connection between REX-LEX?
No you have this correct! As incredible as it may sound - JUST for the DC power connection from the LPS to the LT3045 boxes!

I have more of these PoE injector DC adapters on order to try post the LT3045's. That is before as well as after the LT3045 box.
For $8 a DC link - why not give it a try!

I really have no viable explanation of 'why' this is causing the SQ changes. As I have learned over the years - to trust my ears.
Cheers!


Top
 Profile  
Reply with quote  
PostPosted: Mon Apr 16, 2018 7:38 am 
Offline
User avatar

Joined: Fri Aug 16, 2013 8:23 am
Posts: 1739
Location: Seattle, WA, US
As i had one extra SSTP CAT6 left over - I just replaced the BJC CAT6A PoE DC link in my office system. And I swear the SQ improved - just a greater ease to the music flow.

I listen here to classical all day as I work. It's a pretty simple DDC/DAC chain: PC Server( PCIe16 USB 3.0 card generic)>JB>Split Forza Twin Copper USB cable>iPur2>LKS USB-100>Quad AD1865 R2R DAC by way of i2s.

No ICRON/Startech, no RuR, no IR, etc...

Power is El Cheapo LT1084/R-Core>LT3045(7VDC)>PoE DC>LT3045(5VDC)>star quad silver teflon>LKS USB-100.

I should also note the Amazing DIY Epitome 10AWG Silver/Teflon (with special HF filtering) power cord feeding the Quad AD1865 DAC from a Art Audio PB4X4Pro.

The ability to hear SQ improvements in this much less resolving system (Pathos Classic MK2/HG tubes, Mission M71i Speakers on sand filled stands) gives me hope that others with similar systems could benefit from the PoE/DC discovery.
Just sounding so sweet and creamy musical now. Love it!
Attachment:
IMG_1104.jpg
IMG_1104.jpg [ 279.59 KiB | Viewed 543 times ]

Cheers!


Last edited by Tubelover2 on Mon Apr 16, 2018 7:43 am, edited 1 time in total.

Top
 Profile  
Reply with quote  
PostPosted: Mon Apr 16, 2018 7:40 am 
Offline

Joined: Sat Nov 07, 2009 6:45 am
Posts: 93
Location: kitchener, ON, CA
Tubelover2 wrote:
sima66 wrote:
Tubelover2 wrote:
So here is the office DC chain: LPS 8.5VDC>LT3045 7.1VDC>PoE DC to Ethernet passive adapter>BJC UTP CAT6a 1M>PoE DC to Ethernet passive adapter>LT3045 5VDC>Star quad silver teflon 6in shielded cable>LKS USB-100
Attachment:
IMG_1101.JPG


I would like to try the Supra CAT8 between the LEX and REX as well. It has received good reviews as a data cable.

Cheers!

Forgive my stupidity, but I'm really trying hard to understand this!
Is all this new "PoE chain" for improving the DC cable ONLY and has nothing to do with the actual Ethernet (in our case) or with the connection between REX-LEX?
No you have this correct! As incredible as it may sound - JUST for the DC power connection from the LPS to the LT3045 boxes!

I have more of these PoE injector DC adapters on order to try post the LT3045's. That is before as well as after the LT3045 box.
For $8 a DC link - why not give it a try!

I really have no viable explanation of 'why' this is causing the SQ changes. As I have learned over the years - to trust my ears.
Cheers!

Thanks Rob!
So those black boxes, in the picture, are your boxed LT3045's.....right?

Does anyone tried to use John Swenson shielding method on the unshielded BCJ Ethernet cable? That would might make an improvement.
I'm planing to do it, but I have only one cable and I will not be able to compare after! :(


Last edited by sima66 on Mon Apr 16, 2018 7:57 am, edited 1 time in total.

Top
 Profile  
Reply with quote  
PostPosted: Mon Apr 16, 2018 7:57 am 
Offline
User avatar

Joined: Fri Aug 16, 2013 8:23 am
Posts: 1739
Location: Seattle, WA, US
sima66 wrote:
Thanks Rob!
So those black boxes, in the picture are your boxed LT30145's.....right?

Does anyone tried to use John Swenson shielding method on the unshielded BCJ Ethernet cable? That would might make an improvement.
I'm planing to do it, but I have only one cable and I will not be able to compare after! :(
Yes they are 500mA LT3045 DIY boxes.

Yes you are right the BJC CAT6a (I use a 1 foot version between the LEX and REX) is an unshielded UTP cable. I have toyed with the idea of adding some copper braided passive shielding (no connected to ground to maintain GI), but never got around to it.

Once these dual shielded CAT7 arrive I may try one with the shielding disconnected from the jack, between the LEX and REX. Same for the Supra CAT8.
Which I hear is pretty amazing for the money.

There is of course the super expensive SoTM $500 dCBL-CAT7 Audiophile Ethernet Cable - that folks who use on their Streamers rave about.

Or there is the obscenely expensive $1100 dCBL-CAT7 Audiophile Ethernet Cable Special Ed
Attachment:
SOtM-iSO-CAT6_Isolator_Special_Edition_1024x1024.jpg
SOtM-iSO-CAT6_Isolator_Special_Edition_1024x1024.jpg [ 47.79 KiB | Viewed 541 times ]


Not sure if the LEX>REX would get that kind of benefit. Would be nice if iFi did one for like $200. :wink:

I did try a few Ethernet isolators like the Baake and Pro-Tek5 in between the LEX and REX and they hurt SQ badly. Did try a pair of TP-Link FMC powered with LPS's - no change.

The $49 Supra is reasonable enough to try - and mod:
https://audiobacon.net/2017/05/31/supra ... xperience/


Cheers!


Last edited by Tubelover2 on Mon Apr 16, 2018 8:10 am, edited 2 times in total.

Top
 Profile  
Reply with quote  
PostPosted: Mon Apr 16, 2018 8:00 am 
Offline

Joined: Sat Nov 07, 2009 6:45 am
Posts: 93
Location: kitchener, ON, CA
.........or the JCAT Ethernet cable! :)

https://jcat.eu/product/signature-lan-cable/


Top
 Profile  
Reply with quote  
PostPosted: Mon Apr 16, 2018 8:08 am 
Offline
User avatar

Joined: Fri Aug 16, 2013 8:23 am
Posts: 1739
Location: Seattle, WA, US
sima66 wrote:
.........or the JCAT Ethernet cable! :)

https://jcat.eu/product/signature-lan-cable/
$1200 :lol: :lol: :lol:

Paul Pang sells the PACHANKO Ethernet cables as well...
https://www.highend-audiopc.com/shop/en/lan-cables

A 'bargain' at $437 for the totl PACHANKO LAN Cable Itération 1.5m :lol:
Attachment:
PachankoItrationLan.jpg
PachankoItrationLan.jpg [ 154.45 KiB | Viewed 538 times ]



And then the real money maker - Audio Quest!
New Rolls Royce for Bill Low!

AQ Vodka for a measly $289!
Attachment:
AQ-Vodka.jpg
AQ-Vodka.jpg [ 82.03 KiB | Viewed 538 times ]

Got to get into this cable business! :mrgreen:


Top
 Profile  
Reply with quote  
PostPosted: Mon Apr 16, 2018 10:38 am 
Offline

Joined: Sat Nov 07, 2009 6:45 am
Posts: 93
Location: kitchener, ON, CA
Tubelover2 wrote:

So here is the office DC chain: LPS 8.5VDC>LT3045 7.1VDC>PoE DC to Ethernet passive adapter>BJC UTP CAT6a 1M>PoE DC to Ethernet passive adapter>LT3045 5VDC>Star quad silver teflon 6in shielded cable>LKS USB-100

Cheers!


Wouldn't be better to use both LT's in the end of the DC Cable?!
Having one LT3045 in the beginning of the cable (before the PoE) might not be that effective like having it on the end?!
Just a thought and maybe worth to try! :)


Top
 Profile  
Reply with quote  
PostPosted: Mon Apr 16, 2018 11:19 am 
Offline
User avatar

Joined: Fri Aug 16, 2013 8:23 am
Posts: 1739
Location: Seattle, WA, US
sima66 wrote:
Tubelover2 wrote:

So here is the office DC chain: LPS 8.5VDC>LT3045 7.1VDC>PoE DC to Ethernet passive adapter>BJC UTP CAT6a 1M>PoE DC to Ethernet passive adapter>LT3045 5VDC>Star quad silver teflon 6in shielded cable>LKS USB-100

Cheers!


Wouldn't be better to use both LT's in the end of the DC Cable?!
Having one LT3045 in the beginning of the cable (before the PoE) might not be that effective like having it on the end?!
Just a thought and maybe worth to try! :)
Certainly can and will try that once I settle on a CAT7 or CAT8 cable. Note in my main system my 500mA LT3045 boxes have two LT3045 inside (one 7.1VDC feeding a 5VDC) - for the IR, USB hub, SSD, LEX. The Rex has a single 1A dual parellel LT3045. So the PoE/DC is right before these dual boxes - fed by the DC30W Ghent DC cable - which is shielded as well!
https://www.ghentaudio.com/part/dc12.html
Quote:
Features & Specifications
Oyaide DC-2.1G/2.5G to Aviation GX12-2 Interconnect Canare 4S6 HIFI Power Supply Cable, Single(1pc)
Purely handmade craftwork, genuine material and solid substance
Cable: Canare 4S6 Star Quad, OD 6.4mm, 4 conductors x 20AWG/cond
Connector: Japan Oyaide Golden-Plated DC plug, UL Quality Aviation GX12-2 Plug
Solder: Lead free, Rosin Core with 3% Silver, 0.5% Copper and Tin

Attachment:
dc12-1.jpg
dc12-1.jpg [ 86.12 KiB | Viewed 518 times ]



I chose the arrangement for the office partly for neatness - running the LPS DC cable under my shelving to the first LT3045. So at that point the PoE DC CAT cable is fed a stable clean 7.1VDC. Then the final LT3045 @ 5VDC would 'clean-up' any noise picked up by the previous unshielded BJC CAT6a UTP cable. Now with a shielded SSTP CAT6 or CAT7 not as much of a concern.

But still why should the PoE injector have any SQ effect at all? :?:

Just speculating (and I know Alex will just blown all this out of the water! :P ), I think the cause of action 'could' be high impedance due to the small gauge of the 26awg copper Ethernet wires is blocking some kind of leakage (highly doubt this as the PoE injector is passive with no GI transformer). The superior 'twist' of a Ethernet cable could instill greater RFI/EMI reduction (this makes no sense - since I'm adding additional cable then before - and still using the Star Quad Silver Teflon to link the LT3045 to DDC).

Lastly - some kind of lowering of the DC impedance of the LPS output. But smaller gauge copper wire would imply higher impedance. And there is minimal voltage lost in these short lengths.

Most likely I've completely lost it and need to check in to a loony bin!
Attachment:
2017-04-15_ent_30201899_I1.JPG
2017-04-15_ent_30201899_I1.JPG [ 25.13 KiB | Viewed 518 times ]


Delusion or not - I'm loving the sound!
:lol:


Top
 Profile  
Reply with quote  
PostPosted: Tue Apr 17, 2018 7:11 pm 
Offline

Joined: Sat May 06, 2017 1:21 pm
Posts: 8
Location: PLYMOUTH, MN, US
Tubelover2 wrote:
So here is the office DC chain: LPS 8.5VDC>LT3045 7.1VDC>PoE DC to Ethernet passive adapter>BJC UTP CAT6a 1M>PoE DC to Ethernet passive adapter>LT3045 5VDC>Star quad silver teflon 6in shielded cable>LKS USB-100


Trippy. Sounds so crazy, I *have* to try it.


Top
 Profile  
Reply with quote  
PostPosted: Thu Apr 19, 2018 7:10 am 
Offline
User avatar

Joined: Fri Aug 16, 2013 8:23 am
Posts: 1739
Location: Seattle, WA, US
The IBRA-3-Feet-CAT-7-RJ45-Ethernet-LAN-Network-Cable arrived. The best yet!

Amazing how each of these cables sound different.

So my ranking PoE to DC:

1 IBRA-3-Feet-CAT-7-RJ45-Ethernet-LAN-Network-Cable
2 Vandesail Flat CAT7 LAN Network Cable 3FT
3 CAT6 SSTP Shielded Gigabit RJ45 Ethernet Cable 1Ft
4 BJC CAT6a UTP 3Ft

The top two are very close sounding to each other.

Cheers!


Last edited by Tubelover2 on Thu Apr 19, 2018 1:05 pm, edited 1 time in total.

Top
 Profile  
Reply with quote  
PostPosted: Thu Apr 19, 2018 10:32 am 
Offline

Joined: Mon Mar 09, 2015 6:11 am
Posts: 72
Location: London, Greater London, UK
Tubelover2 wrote:
The IBRA-3-Feet-CAT-7-RJ45-Ethernet-LAN-Network-Cable arrived. The best yet!

Amazing how each of these cables sound different.

So my ranking PoE to DC:

1 IBRA-3-Feet-CAT-7-RJ45-Ethernet-LAN-Network-Cable
2 Vandesail Flat CAT7 LAN Network Cable
3 CAT6 SSTP Shielded Gigabit RJ45 Ethernet Cable
4 BJC CAT6a UTP

The top two are very close sounding to each other.

Cheers!


Hi Bob
Thanks for the update, so shorter is not necessarily better with the PoEs?




Sent from my iPhone using Tapatalk


Top
 Profile  
Reply with quote  
PostPosted: Thu Apr 19, 2018 12:57 pm 
Offline
User avatar

Joined: Fri Aug 16, 2013 8:23 am
Posts: 1739
Location: Seattle, WA, US
tapatrick wrote:
Tubelover2 wrote:
The IBRA-3-Feet-CAT-7-RJ45-Ethernet-LAN-Network-Cable arrived. The best yet!

Amazing how each of these cables sound different.

So my ranking PoE to DC:

1 IBRA-3-Feet-CAT-7-RJ45-Ethernet-LAN-Network-Cable
2 Vandesail Flat CAT7 LAN Network Cable
3 CAT6 SSTP Shielded Gigabit RJ45 Ethernet Cable
4 BJC CAT6a UTP

The top two are very close sounding to each other.

Cheers!


Hi Bob
Thanks for the update, so shorter is not necessarily better with the PoEs?




Sent from my iPhone using Tapatalk
No shorter at least 1 ft vs 1 Meter not a factor.
I updated the post to show the respective lengths.

There does appear to be at least a 72 hours burn effect.

I should caution folks this is only for PoE(non-std) to Poe(non-std) use. Never try this with any Ethernet data device.

Cheers


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3193 posts ]  Go to page Previous  1 ... 209, 210, 211, 212, 213

All times are UTC - 8 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group