Hi Matt,
This depends on whether you are referring to the volume level at a particular point on the volume dial or the maximum overall attainable volume. The gain in your system from the various sources, through the pre-amp, and the front end of your main amp (and the speaker efficiency) will establish how loud your system will play at various points on the volume knob; but the overall maximum output capability will be established by the main amplifier continuous output, the man amplifier dynamic headroom, the speaker efficiency, and the speaker maximum output capability.
