One PSU, two units

Not at all, I am grateful to you for checking I wasn't about to make an expensive mistake.

Two qualifications on my last post:
1) I hadn't tried the Y lead idea so I had a ground loop in there, and
2) My LCD-2's are relatively insensitive so my Solo UL was probably drawing more current from the PSU1 than most headphones would need.

On balance I think you'd probably be fine sharing one PSU1 to start with. You could try a loan one later on to see if it improved the sound.

The PSU1 is rated at 200mA on a technicality.

The transformer is 12VA. At its 23VAC out it should do a constant 520mA.

However, the CB test house insisted that so much of its secondary 12VA is used in its primary magnetisation current.

The magnetisation current is around 30mA on the primary (Far Eastern units are nearer 60mA due to the use of inferior steel).

30mA on the primary translates to 300mA on the secondary (this being a 230VAC:23VAC transformer).

Therefore there is only 220mA left!

By the same standardisation (that's IEC 60950 by the way), Far East units get the same certification but are allowed to rate theirs at 500mA, and sometimes as much as 750mA!

It seems their magnetisation current is different to our magnetisation current.

I always thought it odd that two or more standards could exist in the same standard and pestered the European test house for an answer. Although having paid dearly for their services the test engineer simply stopped replying to my calls and emails...

We also had trouble with the Canadian standards people who wanted to strip the PSU1 of the standard they gave it. The test house would not reply on that either.

There was also an argument on the difference in melting point between British and Far Eastern ABS....

I suppose the boiling point of water is different in the far east too!!!

The PSU1 is limited to what it can do by its input fuse. It had to be rated at 63mA because British ABS melts and Far Eastern ABS doesn't....

The magnetisation current cannot be always guaranteed to be bang on 30mA, although in most cases it is - being made of superior and expensive British transformer steel -  so we had to say (or it was suggested we had to say) it was higher at 40mA.

63mA - 40mA = 23mA and by transformer ratio that equates to 230mA.

At 230mA the input fuse would open. Rating it at 200mA gives a margin to keep the fuse intact.

It doesn't take much brain to work out from the above that 100 watt stereo amplifiers should have 500 watt transformers - but they don't...

So am I surprised the PSU1 doesn't get any warmer when loaded up by two units? No.

There's electronics electronics and political electronics and electronics that smell of... sheep, no... bull.... er, yes bull-sh*t! That's what it is!

Don't worry about the sale! Use a Cusat50 or Lautus so you get a good earth return and one PSU1 can do the two jobs!

I have a different issue - three PSU1's for two units.
I just need to save some cash for my third silver box.