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Post by Clive on Jul 2, 2024 11:59:50 GMT
Hi Torben, The FMCs I use are very basic from 10Gtek/ipolex, I’m sure they can be improved. I chose this type as they take a 5V power supply as I have a pair of 5V super capacitor power supplies I wanted to use. These power supplies provide a lot of isolation from the power line. www.amazon.co.uk/gp/product/B078RGPRH1/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1Don’t bother with the totally awful power supplies that come with FMCs. Cut off the DC plugs as they can be useful then chuck the power supplies.. Thanks Clive.  Torben For sure batteries give ideal isolation. Sometimes when I used them the SQ hasn’t been what I’d hoped though for FMCs it’s probably fine. I may give power banks a go though it drives me mad having to check them and recharge! |
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bencat
Rank: Quartet
Posts: 353
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Post by bencat on Jul 2, 2024 13:35:53 GMT
Okay to my surprise the Amphenol cables arrived today and I took no time at all to replace the two cables . First thing is I was asked if the DAC SFP cables I was using were passive or active , well with the cheap generic ones I bought I have not idea as there was not informations . The Amphenol cables are definitely passive not sure if all DAC SFP cables are passive ?
Well good to say switch over worked first time and the music never even stopped . Been in about an hour and you all know how hard it is to spot changes when you have to be remote so please just accept this as my impressions . This time I found I coud not really detect any difference between these cables and the generic ones sound was still top class but in my network and how I use the connections there was no real difference . Having said that the generic cables have been in use over twenty four hours and improved over that time and these cables sound as good straight in . Perhaps these will also improve .
Also as these cables are not in the direct path of the audio stream like others on here this may be why they sound so similar . Not that bothered to be honest as the sound is still better than it was with the Cisco Optical cables so I am well ahead of the game . I am also much happier that I now have much shorter 0.3m and 0.5m cables which is tidier and in the case of real wire the best is no cable or the shorter the better .
This does leave me now with 2 x 2m Cisco Optical cable and 2 x 1m DAC SFP Cable spare that is not going to be used by me . So if anyone wants to try either then drop me a message and let me know as I will happily post out either for a loan to try or if you want to keep them we will sort something out .
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Post by Clive on Jul 2, 2024 19:14:53 GMT
I’m wanting to understand the context of your DAC cables so two questions…
Which DAC cable do you have that predated your Amphenol? ipolex?
Which version of Amphenol do you have?
My understanding is that DAC cables are all passive but I’m new to the world of DAC cable so I’m no authority.
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bencat
Rank: Quartet
Posts: 353
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Post by bencat on Jul 2, 2024 20:54:34 GMT
Hi Clive I presume this question is made to me and with regard to the previous cable it is GW-Fibre SFP and was bought off eBay . So the regard to the Amphenol cable it states 571540001 .
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Post by Clive on Jul 2, 2024 21:02:53 GMT
Hi Clive I presume this question is made to me and with regard to the previous cable it is GW-Fibre SFP and was bought off eBay . So the regard to the Amphenol cable it states 571540001 . Thanks, yes - apologies for not being clear. |
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Post by MartinT on Jul 3, 2024 4:09:00 GMT
The Amphenol cable we have been discussing, with the exceptional sound quality due to SkewClear, is SF-SFPP2EPASS-00X where X is the length in metres.
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Post by MikeMusic on Jul 3, 2024 6:39:47 GMT
My SF-SFPP2EPASS-003 is on the way !
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Post by MartinT on Jul 3, 2024 7:07:15 GMT
My SF-SFPP2EPASS-003 is on the way ! You're in for a (hopefully pleasant) surprise! |
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Post by Clive on Jul 3, 2024 7:17:55 GMT
My SF-SFPP2EPASS-003 is on the way ! You're in for a (hopefully pleasant) surprise! Mine showed as in stock but now they tell me it’s back ordered. Grrr.😡 |
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bencat
Rank: Quartet
Posts: 353
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Post by bencat on Jul 3, 2024 9:05:27 GMT
Not sure where you looked for this cable but the following is in stock but takes 4-6 weeks as it is a US import .
Ahh just found the following and they seem to have lots in stock and also various lengths which may also be needed by others .
Well after ordering the 1 mtr cable with Amazon and having a 4 -6 week delivery time I then searched for a 0.5 cable which is all I need and this only has a 7 - 10 day delivery time and is just over £35 so cancelled the other order and replaced it with the shorter length . As has been stated further down no idea if there is an optimum length for this cable as there is for Optical but for me copper wire should the be as short as possible .
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Post by Clive on Jul 3, 2024 9:25:01 GMT
I used Mouser who said they had stock…..now due in stock in a couple of weeks. Never mind, the gnodal is good so I’m ok to wait.
I’m not sure about length vs performance, it might be the type of cable which benefits from being longer..ie more ability to drain noise over a longer run. The 0.2m cable I have is nowhere near as good as the 3m cable, I can’t be sure that length is important in this case but I’m suspicious.
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bencat
Rank: Quartet
Posts: 353
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Post by bencat on Jul 3, 2024 9:47:52 GMT
I used Mouser who said they had stock…..now due in stock in a couple of weeks. Never mind, the gnodal is good so I’m ok to wait. I’m not sure about length vs performance, it might be the type of cable which benefits from being longer..ie more ability to drain noise over a longer run. The 0.2m cable I have is nowhere near as good as the 3m cable, I can’t be sure that length is important in this case but I’m suspicious. Strange because I would think given the experience with other cables that Optical Cables need to be at least 2 m for the light wave to be optimum . With copper cable the electrical theory is that the shorter the cable the better and have switched from 1 mtr to 0.3 and 0.5 and this is now showing a great improvement over the longer length . However that is complicated by the new Amphenol cable being different to generic cable I had before . So is the improvement the short length or is it the new cable construction ? |
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Post by Clive on Jul 3, 2024 10:35:24 GMT
I used Mouser who said they had stock…..now due in stock in a couple of weeks. Never mind, the gnodal is good so I’m ok to wait. I’m not sure about length vs performance, it might be the type of cable which benefits from being longer..ie more ability to drain noise over a longer run. The 0.2m cable I have is nowhere near as good as the 3m cable, I can’t be sure that length is important in this case but I’m suspicious. Strange because I would think given the experience with other cables that Optical Cables need to be at least 2 m for the light wave to be optimum . With copper cable the electrical theory is that the shorter the cable the better and have switched from 1 mtr to 0.3 and 0.5 and this is now showing a great improvement over the longer length . However that is complicated by the new Amphenol cable being different to generic cable I had before . So is the improvement the short length or is it the new cable construction ? I agree that with analogue copper cable that shorter is usually better. In the digital domain we get into whether there are reflections which can mean that very short runs can be problematic…plus it’s possible that the cable construction for this specific cable is acting to remove noise so a longer run might be beneficial. This is all my supposition….it could be that shorter is better, there’s only one way to find out! |
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bencat
Rank: Quartet
Posts: 353
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Post by bencat on Jul 3, 2024 11:03:31 GMT
Spot on Clive I have made some threads on other forums and was very sad to see this described as foo given the very low cost of trying for yourself if you already use sfp . There is then the vagaries of each network which will be different so I would fully expect this not to work or make very limited improvements in some systems others will report quite a large uplift in sound quality . The great thing is it is still safe and does no electrical harm and any sound improvement is a bonus. I am sticking with short length for direct purchase but if anyone wants to do a deal later then get a trial at that as well .
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Morph
Rank: Duo
Posts: 62
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Post by Morph on Jul 3, 2024 13:12:59 GMT
Well I've enjoyed the addition of the gnodal DAC cable so I figured trying the Amphenol Skewclear is definitely worth a go. Bearing in mind that in my set up I don't actually have an SFP capable streamer I'm really pleased with the sq improvement going from.... MR600 Router - Ugreen Ethernet - EtherRegen - DAC cable - Modified Cisco Meraki OCXO - Ugreen Ethernet - Melco N1ZH. Looking forward to the Amphenol arriving and thinking about how long it would take me to save up enough funds for the Sonore Signature Rendu Deluxe!
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Post by orange55 on Jul 3, 2024 14:14:46 GMT
Well I've enjoyed the addition of the gnodal DAC cable so I figured trying the Amphenol Skewclear is definitely worth a go. Bearing in mind that in my set up I don't actually have an SFP capable streamer I'm really pleased with the sq improvement going from.... MR600 Router - Ugreen Ethernet - EtherRegen - DAC cable - Modified Cisco Meraki OCXO - Ugreen Ethernet - Melco N1ZH. Looking forward to the Amphenol arriving and thinking about how long it would take me to save up enough funds for the Sonore Signature Rendu Deluxe! What cable does the DAC replace? Was it an optical? |
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Morph
Rank: Duo
Posts: 62
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Post by Morph on Jul 3, 2024 16:27:56 GMT
Well I've enjoyed the addition of the gnodal DAC cable so I figured trying the Amphenol Skewclear is definitely worth a go. Bearing in mind that in my set up I don't actually have an SFP capable streamer I'm really pleased with the sq improvement going from.... MR600 Router - Ugreen Ethernet - EtherRegen - DAC cable - Modified Cisco Meraki OCXO - Ugreen Ethernet - Melco N1ZH. Looking forward to the Amphenol arriving and thinking about how long it would take me to save up enough funds for the Sonore Signature Rendu Deluxe! What cable does the DAC replace? Was it an optical? Pre gnodal was optical with Finisar FTLX1475D3BTL. I picked up a gnodal DAC cable from ebay but given the enthusiasm around the Amphenol Skewclear DAC cable decided to jump onboard and try it out. Pleased too see that it's been dispatched already. |
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Morph
Rank: Duo
Posts: 62
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Post by Morph on Jul 4, 2024 8:21:00 GMT
So I've just noticed mention that the Amphenol DAC cable does not get on with Cisco switches. This may well throw a very large spanner in the works here! My Cisco Meraki was modified thus audiophool.nl/cisco-meraki-switch-ocxo-clock-upgrade/. Can anyone with better tech knowledge let me know if I'm on a loser here? The Amphenol seems to be due tomorrow so I'll find out soon enough I suppose. Thanks Morph |
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trhh
Rank: Soloist
Posts: 24
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Post by trhh on Jul 4, 2024 8:29:40 GMT
I got this information:  Torben |
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Morph
Rank: Duo
Posts: 62
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Post by Morph on Jul 4, 2024 8:36:16 GMT
Thanks Torben.
" A lot of times we run into difficulties in the following...." Well I can only hope that "a lot of times" might not apply to the modified unit. Assuming the cable does arrive tomorrow I'll report back of course. So, if I've made a mistake in buying it for my set up, there will be a 1m length available for someone if they want!
Thanks
Morph
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