Stereo system question - Alternator needed?

[Piper]

Hello folks,

I just had a Pioneer Avic z110bt installed, along with its HD Radio, XM Satellite, and MSN Direct tuner accessories, onto a 2001 Boxster S with the premium sound option. The unit is wired directly into the factory amp, and for the most part is doing quite well.

A few things have happened recently that have made me question whether or not I've got enough juice to run all this stuff. Occasionally I will be driving along and the sound will cut out momentarily, sometimes associated with blacking out of the head units screen, and very rarely, a popping noise coming from the engine compartment that sounds suspiciously like an electrical arc.

These episodes last about a second, and it comes back on like nothing ever happened, not even skipping beat.

Surely this can't be good. I suppose my questions are "What could this be?" and "Could it be my alternator isn't strong enough?" and "What can I do about it?"

Thank you all for your input, I appreciate it.