Help with DIY dedicated circuit


I am wanting to install a dedicated circuit for my amp, but getting from my panel to the wall behind my amp is going to be difficult. As I was investigating in my attic, I realized that when I changed my stove from electric to gas, the unused 30 amp Romex 10/3 wire will reach within 15 feet of where I want the wall outlet. Do I install a junction box and run Romex 10/2 to the new wall outlet and use the 30 amp breaker? What is the best way to connect the wires in the junction box?
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Done! 20 amp breaker. I went with Romex 10/2 from junction box to a single Porter Port outlet which was a little frustrating manipulating the 10 gauge solid copper connections. I decided against 2 outlets at this time since all my gear is connected to a PS Audio P10 Power Plant. Now, to see if I can hear a sound difference.
Nice thread -Jon,
I look forward in reading more about your aural impressions, thoughts, post-installation of 20A breaker and Porter Port outlet.

Happy Listening!
A definite, noticeable, small incremental improvement with the dedicated circuit. I was skeptical because I thought the PS Audio P10 should be able to produce near perfect power from what comes through most any wall outlet. Voices and instruments float a little more distinctly into position and sound-stage is a little deeper. I was already very happy with the sound of my system, so I never expect big changes with these tweaks. I do think it was worth the effort.