What is the relation between amplifier RMS/peak power, source level and the speaker power rating? Let's say 8 ohm speakers could handle 100 watts by the spec. The amplifier puts out 300W/8Ω of continuous power per channel with a peak of 450W/4Ω per channel. If the amplifier gain is set to 1/3, is it possible to blow/damage the speakers or the amp by having too high source level (for instance, by cranking DAC volume control too high)? If so, how do I know which is the safe threshold for source level and amp gain for the speakers to handle?