ATC SCM19 V2 Recommendations.

I use the Dolby specs which place the speaker at a 22 to 30 degree angle from the MLP. You can achieve those angles by either moving the speakers, moving the MLP, or both. As for height the Dolby specs recommends tweeters at around ear height.

@tony1954   What are those stands?  Can you make them ring by tapping them lightly with a screwdriver or wrench? 

6 foot triangle works but how far from the front wall (the wall behind the speakers)

So glad to see you invest in the life's work of Billy Woodman.  That driver was I think his first SL driver design, came after the midrange.  The tweeter in that pair is a miniature version of the ATC mid design..  All hand built in the Cotswolds, not too far from the old Jaguar factory.

@kota1 

I had a look at the Dolby site, but everything seemed to be linked to Dolby Atmos?

You should check out the Audio Physic speaker placement. I thought it was more progressive and more suited to two channel setups.

@lonemountain 

No identifying marks on the stands. They are all metal, powder-coated design that the original owner filled with something. Each stand weighs around 20lbs.

Tried to make them ring, but all I got was a metallic thud.

Front of speaker is 42" from front wall. I was born a few hours north of the Cotswolds in Radcliffe, but emigrated to Canada when I was 3 years old.

The Dolby specs I posted above are for a 2.1 system. You can try it and see how it works in your room. I'll check out the audio physic site, thx.