Dedicated circuits

I believe in isolation of power to my audio system. I installed 3 dedicated lines for my system. I used 10ga romex for amp, 12 ga for preamp and another 12ga for digital.  I used 20amp breaker for the amp and 15 amp breakers for the other two lines. All my components have robust power supplies supplying the needs of the audio curcuits therin. I believe the current supplied is more than sufficient.  Also used hospital grade outlets for all lines. Lines are rum off a subpanel that, in addition, only serves  bedroom outlets and lights.

Yes @ditusa  I never new such an amp existed.  Thanks!

Does anyone know of an amplifier that would require greater than a 15 amp curcuit?  By this I mean one that even for a mil sec would draw 15 amps?

Unless of course it became defective hence the need for the breaker. Likely a 15 amp breaker will do for any amplifier. Likely the safeest. 

My takeaway from the above:

A 20 amp receptical should never terminate a 15 amp line. A very reasonable rule.

A 15 amp breaker will trip earier than a 20 amp breaker when used in a 20 amp line.  Electrically this may be safer however may not be code in many locales.

Insurance companies may care more about what is code than what one might percieve as safer when it comes to claimes.

If one feels the need to overkill the power supply side of your audio system regardless of one's thoughts to the sink requirements do so using an approach that is safe and follows code.