Why is the KLH Model Five one of the best-selling loudspeakers in history?

Dating back to the 1950s, there has always been a desire for low-bass extension from a small enclosure. Back then, one of the best ways to achieve this output of sound was through the acoustic suspension design. This design principle turned KLH into dominant solution in the loudspeaker industry for decades. The Model Five was then introduced in the mid-60s when high-fidelity was first becoming popular. The original Model Five was the perfect mix of size and performance and lead to un-heard of success in the speaker industry which is rarely experienced today.