Hi,
Larger speakers will exhibit as good sound at low volumes as they do when they're driven harder. In a very general sense, larger speakers require fewer amplifier watts to produce the same sound level as a compact speaker. That may seem contradictory at first, but the small woofer in a small speaker has to "work" quite hard to produce low bass, consequently it uses more energy to do so.
For example, the M60s are about 2 dB more sensitive than the M3Ti's. If you fed each 1 watt of input power, the M60s would be louder than the M3Ti's (95 dB SPL vs. 93 dB SPL). A 2dB difference in sensitivity is subjectively "just noticeable" in terms of volume.
You don't have to "push" a speaker hard to get the sound it was designed to produce. However, at low volumes our hearing is rather insensitive to low bass frequencies. So to hear bass clearly, you do have to raise the volume somewhat. But that applies to all speakers, small or large.
Regards,
