"We were gradually playing larger venues and in the early days PA systems were kind of non-existent. So to play loud, we had to use louder equipment. The PA systems back then didn't mic the instruments - only the vocals"

In this quote, John Entwistle reviews the evolution of live music efficiencies and the technological constraints dealt with by bands in the early days of their professions. Entwistle, who was a prominent bassist for The Who, offers insight into the challenges and adjustments required by musicians to provide effective live efficiencies during a time when noise amplification technology was in its nascent stages.

The expression "We were gradually playing bigger venues" shows the band's growing appeal, which demanded efficiencies in bigger spaces where sound forecast became a more considerable challenge. Larger places need more powerful sound systems to guarantee that the music can be heard plainly by all guests, consisting of those seated or standing further from the stage.

Entwistle goes on to discuss that "in the early days PA systems were sort of non-existent", highlighting the restricted technology offered at the time. PA (public address) systems, which are essential for magnifying sound in live performances, were either basic or lacking entirely. This constraint positioned a significant barrier for bands intending to produce the significant volume needed to fill larger spaces.

To compensate for this lack of innovation, Entwistle notes that they "had to use louder equipment". Artists relied on more effective amplifiers and speakers to enhance the noise of their instruments. This adaptation is a testament to the resourcefulness and innovation of musicians who were identified to provide high-energy efficiencies regardless of technological constraints.

Lastly, Entwistle points out that "The PA systems back then didn't mic the instruments - just the vocals". This stresses the main focus of early sound systems on amplifying singers' voices, rather than the instruments. Subsequently, bands had to individually ensure their instruments might fill the location with sound, driving musicians to pursue ever-louder technologies, which inadvertently contributed to the advancement of advanced sound systems and devices in time.

In summary, John Entwistle's quote offers a look into the early challenges of live music performance, highlighting the ruthless pursuit of volume and clearness in the absence of advanced technology, and highlighting the innovative spirit of artists throughout that period.