Identifying an Auditorium 23 Step up transformer


Hi, I have an Auditorium 23 Step up Transformer but don't know whether it is the high impedance version - for Denon 103, EMT etc, or the low impedance version for Ortofon SPU. There are no markings that indicate anything on the case. Can anyone help please? Mine has a black earth wire coming from its innards.
Thank You
rogerstaton
I have an Auditorium A23 SUT, designated/purchased for a Denon 103D, that does have a black ground wire.                  Never have seen any further info, regarding how to identify other iterations, so- can’t swear to anything.     Input resistance measures 7.8 Ohms (plus probes/leads).
The color code info is on a setup brochure.

Certain I got it right as I recall that the cartridges spelled DOE in the order listed and the colors were in alphabetical order.

DeKay

I have the SPU model I purchased in 2009.  In those days, there was no badge.  Silver colored case work was SPU; black case was Denon/EMT.  Ground wire on mine is black.

Best to take a photo and send it to Jonathan Halpern, Tone Imports, for confirmation, if there is still any doubt.
Thanks for the info guys. Mine is silver casework with a badge and black cable. I will try the importer. I did contact Auditorium 23 in Germany but no reply.
Finally found the pic (CanuckAudioMart A23 brochure) on our favorites, but cannot locate the original listing.

This is what I referenced in the previous post (was looking @ one for a Denon this past year).

Found an OEM replacement stylus for my Grado Silver (that I don’t recall buying) when rooting around for something else and decided to cheap out and keep using what I have.

https://img.canuckaudiomart.com/uploads/large/2055836-31b4fa54-auditorium-23-a23-step-up-transformer...

DeKay