You can use the 20a Torus on a 15a line,as they have the 20a-15a adapter cord.
I had a 20a Torus and until I upgraded my lines that is what I did,used the 20a-15a adapter cord.
Now I use 2X240v Torus and wouldn't be without them especially with projector and a bit of digital gear.
Torus is especially important on subs as I had four F-113's.
Two were direct to the wall and two were into the Torus.
Nothing like a lightening storm to fry two F-113's that were to the wall,the other two that were into the Torus plus all components,projector ect.....nothing.
Wouldn't be without them like alone the music improvements.
Have had Torus for must be 6 yrs or so and they won't be leaving anytime soon.
I had a 20a Torus and until I upgraded my lines that is what I did,used the 20a-15a adapter cord.
Now I use 2X240v Torus and wouldn't be without them especially with projector and a bit of digital gear.
Torus is especially important on subs as I had four F-113's.
Two were direct to the wall and two were into the Torus.
Nothing like a lightening storm to fry two F-113's that were to the wall,the other two that were into the Torus plus all components,projector ect.....nothing.
Wouldn't be without them like alone the music improvements.
Have had Torus for must be 6 yrs or so and they won't be leaving anytime soon.