Marshall ACTON III Bluetooth Speaker (Cream)THE SMALL BUT MIGHTY WORKHORSE Acton II may be compact, but its sound is nothing short of large. It delivers a well balanced, powerful audio experience, yet can fit in the tiniest of spaces. ACTON III BLUETOOTH Acton II may be compact, but its sound is nothing short of large. This dynamic compact speaker features three dedicated class D amplifiers that power its dual tweeters and subwoofer, for a sound that is nothing short of large. With Bluetooth 5.