Ah, thank you. There’s a manufacturer that does a good adjustable wall mount and a data sheet. Thank you. The bracket is Here

I thought the only mounting points were underneath, but the bracket is for two holes at the back. Is it just a case of removing these two screws?

[Linked Image from Meridian-audio.info]

Meridian G61R, HD621, DSP7200L+R, DSP3300C, DSP3200