HIFI Rose merely a hobby brand or a serious business, that is the question?

#141

@rosehan, any updates to this “new found,” commitment???

@ROSEHAN wrote on 7/23/25:

  1. DAC Compatibility Testing
    HiFi Rose develops products with compatibility for major brand DACs in mind; however, unexpected compatibility issues may occur with certain DACs (e.g., Holo Audio). Our development team is currently analyzing the root cause of these issues and is continuously working to improve compatibility.
  2. SPF Port and Compatibility Issues
    We have confirmed feedback from some users reporting that the SPF port could not be used properly.
  3. Firmware Update Manual Errors and USB Port Issues
    We sincerely apologize for the inconvenience caused by errors in the firmware update manual. We are also preparing an urgent patch for issues with the USB port that arose after the update and will promptly provide a corrected update guide.
  4. Update Schedule
    The statement “there is no set update schedule” does not mean that we are discontinuing customer support. It is due to the internal testing and stabilization process required before we can provide an exact schedule. However, we promise to prioritize customer feedback and deliver a stable update as soon as possible.
  5. Commitment to Customer Trust
    We sincerely accept your valuable feedback and promise to implement more thorough testing and quality control as a result of this issue. We will take quick action to regain your trust through effective improvements.

Any updates on this as of 8/19/25?

#142

For the network connection I used Finisar SFP 1G (FTLF1318P3BTL) with Corning LC Duplex SM/LC Duplex. It is a 1G connection and 10G modules do not work.
For the other SFP port (the USB 3.0 fiber) a 10G module (Finisar FTLX1475D3BTL) with the same type of fiber is required.
Incidentally, the SFP modules provided by HiFi Rose for connecting the RSA720 USB hub are 10G as are those for connecting the RD160 via fiber optic.
Be careful when choosing the length of the Amphenol DAC cable!
The 1-3m lengths have a thickness of 30AWG, the 4m one has 28AWG, the 5m one has 26AWG, and the 7m one has 24AWG.
For best results, use a cable with as much thickness as possible.

1 Like
#143

The kit provided by HiFi Rose for connecting the RS130 with the RD160 contains two 10G BiDi modules and a single-mode fiber.
01 02
I don’t understand the position of Hifi Rose which, despite being requested many times, refuses to provide the technical details of the two SFP ports and compatible modules.

#144

Huh?
You are talking about a fiber cable, right?
So the thickness is just a jacket around the same sized fiber.

I suspect that they use a thicker jacket on shorter cables as a way to protect the cable from possible damage. Usually the longer fibers will be used for in the wall/ceiling runs so less handling.

#145

You are making a serious confusion!
My answer is for Sirpopealot, who said that he could not connect the RS130 to the RD160 via fiber optic and used an Amphenol DAC cable instead.
The DAC (Direct Attach Copper) cable is a budget option for fiber optic connection and is a COPPER cable!!! The thickness of the COPPER wire varies depending on the length of the cable, being larger for longer cables!
part nr
Optical fiber has standardized thicknesses for single mode and multimode fiber.
To protect the fiber from damage, steel reinforcement is used!
Armoured Fibre Optic Cable
If you had at least read the posts on this site about fiber optic connections you wouldn’t have made these mistakes! Or if you had used google search before writing! :laughing: :laughing: :laughing:

#146

It might help you understand a little if you read here:

#147

Ah. Now you know why I started with a “Huh?” :wink:

Err yes and no.
So w the SFP/SPF+ interconnects you can use copper. While it is cheaper, usually, there are some other benefits like less heat. (Your transceivers … those bits at the end of the cable that plug in to the port… they can get hot… very hot depending on the transceiver and speed.) And at these interconnect speeds your copper interconnects are going to be limited by length. The longer the run, the lower the bandwidth.
CAT 8 will give you 40Gb/S speeds but at a limited length.

Also, there’s the issue of longevity. The fiber optic transceivers can go bad over time. Copper wires… less of an issue.

Now when you talk about the cable’s wire gauge… again not sure if you’re talking about the overall outer diameter or the actual wires inside. Since you’re talking about interconnects… if you are looking at a component from the bottom rack to a ToR on the top rack… its at most 6’ for a 42U rack. This is why you will sometimes see the ToR in the middle of the rack. (Oh wait… not sure if you actually know or have wired racks of servers.) But I digress. The point is that at these short distances you really don’t need to worry about the gauge of the individual wires. While I said 6’ max, most interconnects are 1m or less.
[edit] Those are patch cables 1m or less. Wiring in a cabinet is a bit longer. The point here is at these distances the wire gauge is less of an issue. (to a point) Its not like speaker wires where you have long runs.

Now w.r.t SFP/SFP+ the reason you don’t see a lot of copper, it is that you end up becoming bandwidth constrained. Fiber transceivers can do 400Gb/S speeds. Copper tops out at 40Gb/S which is your CAT 8 spec. Here the Hifi Rose is what? 1Gb/s port speed or 10Gb/s port speed depending on which product and port?

And yes… you can find different thicknesses of a jacket around the fiber. (Note if you reread what I wrote I said the fibers are the same size.) This is done to protect the fiber.

2 Likes
#148

You are totally wrong!
I was referring to the thickness of the conductor in the cable NOT the thickness of the sheath!
What is the importance of the thickness of the sheath in a cable???
The copper conductors used in the DAC cable are solid not braided and can break very easily.
SFP and SFP+ modules are guaranteed to operate for millions of hours, and the serious SFP modules have the DDM/DOM function (How to Understand DDM/DOM Function of SFP Transceiver | by Orenda | Medium).
Untitled
But that is not the main objective in this discussion (to work as long as possible and be as cheap as possible), but what is the best equipment for sound!
I think you’ve got the wrong forum!

#149

About SFP modules:

#150

Well, anyway, I did order a pair of Finisar FTLX1475D3BTL modules to try between the RS130 and RD160. My favorite connection at the moment remains the Amphenol passive copper DAC cable. I continue to be frustrated with the Rose Connect app indication that the connection is USB and not the SFP port. For that reason I utilize I2S frequently. I2S has been my connection with coffee and music this morning. Absolutely beautiful sound streaming Arooj Aftab - Night Reign via Roon/Qobuz.

#151

Dude,
Did you actually read what I wrote?
Free clue. At l-2m length, the gauge of the wire, especially for digital data is not a major concern.

You can go google about it and see the numbers.

And yes they do put thicker jackets on certain fibers. Its to help protect the fibers when in different environments.

#152

You are very tiring!
Either you don’t understand simple concepts or…
Which is why I stop reading what you write and you get a big block.

#153

:popcorn:

People thinking they have “CAT7” cables really should not be offering any networking advice. Neither should people believing that a fiber brand makes any difference, or that I2S sounds better…

2 Likes
#154

@BorisM I do not appreciate your comments, completely inappropriate and certainly not in the spirit of what this community is all about.

2 Likes
#155

This post was flagged by the community and is temporarily hidden.

#156

This post was flagged by the community and is temporarily hidden.

2 Likes
#157

This post was flagged by the community and is temporarily hidden.

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#158

Well dude, I actually do have cat 8 rated patch cables.
Oh wait, you’re an ‘audiophile’.

I’m just some guy who works in IT and has a cluster of servers in my home office.

Been doing IT for far too many years.

#159

Apparently reading comprehension isn’t your strong suite. And from the mention of CAT7 cables, neither is IT. Must be a tough life.

#160

For you maybe.

I guess you’re not familiar w the IEEE 802.3 standards? Or the working group that set the standard?

The Category 8 standard was developed by the ANSI/TIA-568 standards body, more specifically, the TR42.7 committee. The document that details Category 8 cabling is ANSI/TIA-568-C.2-1, and was published in November 2016 as a standard, therefore Category 8 is no longer in a draft format.

Now I said CAT 7 which was an earlier standard. CAT 8 cables will probably be the last because of limitations on speed in terms of using copper cables.

As you were saying?

Do you also want to talk about RF Interference in terms of patch panel / cord length cables and why the gauge of wire is less of an issue at these short distances?

But I bet you can hear things over 100kHz too right?
I’m just an old guy who’s hearing has dropped to between 16kHz and 17kHz on a good day.