My house has quite a few outdoor speakers, 6-8 of them. My amp has a "Zone-2" stereo output that I'm planning to drive them with. Each set of speakers has a rotary volume control on a wall in the house nearby.

It's not practical for me to take down and disassemble the speakers to check their ratings. But if I wire them all in parallel, can I simply add 6-ohm resistors to one pole of the amp's Zone-2 speaker terminals before it feeds all the speakers?

I did see this in another post:

> Make sure to get appropriate resistors, they will dissipate one fourth
> of the maximum power your amplifier can output, per channel. If you
> have 50W per channel your resistors can dissipate up to 12.5W, so you
> need to get at least this wattage.

It looks like [my amp][1] is rated 60 watts per channel, so I'd need 15W resistors? Will this work to protect the amp? I'm not concerned about volume matching between the sets of speakers.

I have hooked one speaker lead up to the wire that runs through the house and the volume control to the outdoor speaker, and with full rotation of the rotary control it sounds about the same volume as a similarly-sized one I have hooked up in parallel inside (if that answers the question about a 100V system).

  [1]: https://nadelectronics.com/wp-content/uploads/2016/09/T-758-AV-Surround-Sound-Receiver-English-Manual.pdf