It is fair to say that with the industry wide move away from horn loaded point source systems to line arrays and band pass bass enclosures, the conversion of electrical energy into acoustic energy has actually fallen. Funktion One is a notable exception and has been refining its patented, highly efficient, horn loaded systems for decades. Even from their inception, the company wanted to achieve “the best possible audio quality”, by ensuring their systems “focus on maximising efficiency as this tends to produce alive and responsive sound”.
Despite their loudspeaker systems being small and light, they can produce at least 4 times more output than comparable products. This combined energy savings makes their loudspeakers one of the greenest products on the market.