So this existing system has a Pioneer stereo receiver feeding speaker level to a home made 70Volt stereo/ two channel transformer system.
We're just replacing a few speakers in a remodel and switching out old faded volume controls. I also want to install a Sonos Port new two channel amp instead of the Pioneer.
But the issue I can't find any 70V stereo/dual channel volume controls. The existing volume controls are Atlas #DAT-10-W
I don't have any 70Volt experience so not sure what options are if I don't locate any similar volume controls.

[Link: photos.app.goo.gl] Volume Control

[Link: photos.app.goo.gl] Homemade 70 Volt Box

[Link: photos.app.goo.gl] Homemade box again

SORRY, THE LINKS DON'T WORK I'VE TRIED A FEW TIMES