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Thanks, makes sense..

Maybe you are right, maybe not, but what is your explanation..?

Your network speed observations are correct. Dante, as you experience yourself, works on 100baseT and Gigabit speed. Audinate has specs for Dante hardware on their web site that confirms this. For Ravenna this is the theory. From the ravenna-network.com web: "Network infrastructure - since RAVENNA is based on IP, virtually any network infrastructure supporting IP transport can be used. Thus, transport speed and latency numbers scale directly with the performance parameters of the underlying network infrastructure. Although Fast Ethernet is supported, the use of Gigabit Ethernet (at least for the backbone links) is recommended. As faster network technologies get available, RAVENNA can gain direct advantage from them." If the Ravenna hardware in question does not work on 100baseT it might simply be because the network interface (chip) does not support Fast Ethernet. Not unusual these days.

Alex has already explained that the current 'situation' is the reason the skiing was cancelled. He posted this here on AS some time ago. I wrongly assumed that most here knew this. My post was obviously too contextual...

Alex not going skiing? Of course not! He'd really deserve a break by now, but he says that he's pleased to deliver early.

Those that receive their ER's early in this batch can probably thank the fact that @Superdad did not go skiing this week as planned 🤣

I guess you mean '50 ohm up to 75 ohm' The BNC connector is part of the transmission line so an ER with 50 ohm clock input must also have a 50 ohm BNC to terminate a 50 ohm output properly. 50 ohm is not an unusual impedance in this context, but I believe 75 ohm is more common today. EDIT: the Mutec REF 10 has both 50 and 75 ohm outputs

Your setup is very similar to mine. EtherREGEN before a RPI4 with RoPieee and ISO Regen on the DAC input with USPCB on both sides of the ISO. I'd expect that using an external clock like the Mutec REF10 would improve the sound quite a lot. However I am not going to do that. It's simply too costly. The REF10 is almost double the cost of the rest of my system! Currently using the SMPS that came with the ER. I'll probably change that to something better at some point.

Thanks. 20mA is very little. I'll connect it back as soon as I get a better supply. The Aqvox is a better supply than the average phone switcher. but is only 1000mA. What puzzles me is why USPCB+Aqvox doesn't work while USPCB alone works.

Just a ping to have either @Superdad or @JohnSwenson look at the above post

I use a RPI4 with Ropieee in front of a ISORegen connected with USPCB. The IR connects to (and powers) a Sound Devices USBPre 2, also using a USPCB. This combination works. However, the PS for the RPI4 is too small so (while waiting for a bigger/better supply) I need to power the input of the IR with a separate PS. I use the Aqvox USB PS for this (see pic). Now the RPI4 can not see the USBPre 2. The Aqvox is simply inserted in the IR and the USPCB into this. Why is the USBPre 2 invisible in this configuration? I guess the Aqvox breaks + and - for power. It does work when the IR dip switch is togeled 'ON'. Does IR depend on a connected power shield to work? How 'bad' is it to use the IR in 'non-isolation' mode?

I'll get my EtherREGEN beginning of March. My own listening will tell me all I need to know

I think @Superdad is the right person to answer that, if he's not too busy (I'm expecting my EtherREGEN end of this month... )

Thanks John! Good to know I won't have to use more than one ER in a configuration like this.

I have also taken the plunge and ordered an ER. Not that I doubted the ER in any way, just waiting for a convenient time for me... I have posted a couple of questions in the installation and usage thread: