Phono Box DS3 B output impedance

Thanks for your thoughts about that. Yes it's the SS Phono Box (not the Tube Box).

I'm using an E1DA Cosmos ADC Iso to rip LPs. A cheap little device made for measurements but many people use it to rip audio.

You can set the input range / impedance with a dip switch; mine is set on 4,5 Vrms / 1,66 kOhms. Input sensitivity is matching very well with the gain of my Phono Box but input impedance may be too low (though I didn't notice any trouble such as voltage drop or distortion), depending on whether or not the output impedance is high. 

Hence my question about output impedance. I was only able to find the output impedance of the Phono Box RS, which is of 50 Ohms.

@lewm I can raise it a bit for 6.7Vrms / 2.46kΩ input impedance but then the dynamic range is less satisfactory. So if output impedance is low enough, I would rather keep the 4,5 Vrms / 1,66 kOhms setting. I'm trying to figure out if the ratio of output Z to input Z is about 1:10 as you have guessed.

I emailed Pro-ject first but they read my email too quickly and sent a specs sheet without the information I needed. Will try again on Monday!

@lanx0003, I considered the Skoll indeed but Schiit products are hard to find here in France so I had no opportunity to listen to it first. I was offered a good deal for a demo DS3 B so I went for it as I was very satisfied with sound and flexibility.

Thanks a lot for those explanations, guys.

I'm reaching my limits in terms of understanding resistance and electricity but I will slowly learn and then understand what you're talking about.

As far as the sound quality is concerned, it's fine the way I'm going now. But you know, it's always better to match what you hear with the good figures so you are sure that everything is fine. Want to be sure that I made nothing wrong that could have an undesirable effect later...

What I was concerned about mostly is: I wondered if there could be damages if input Z is too low and output Z too high. From what I read it seems that it's not the case, but better to be sure.

@lewm, don't worry about that, I'm grateful for your help so nevermind if it happens to be not 100% exact. Thing is, I'm gathering some informations and will draw conclusions later.

I've read that XLR cables have an impedance of 75 Ohms and DMX cables used for light shows have an impedance of 110 Ohms.

Pro-ject answered me that the impedance of the XLR output was of 100 Ohms. So assuming that the impedance of the cable itself is between 75 and 110 Ohms, we should be fine with a 1,66 kOmhs input impedance.

Regarding the way we should count the impedance of the cable in the system, I can't answer at all but I would be curious to learn if someone can help.

@lewm thanks for these informations! I think I get it now :)