The LRS (Little Ribbon Speaker) is a full-range quasi-ribbon speaker that was designed from the ground up to give you a pretty good idea what to expect from the 20.7 or 30.7. The LRS was designed using high-end electronics and mono blocks. The LRS will perform nicely with a receiver, but it was intentionally designed to extract the most from high-end amplifiers and electronics. The LRS expects more from a properly designed high-current amplifier. That is a radical departure from most entry-level loudspeakers. If you put your expensive high-end amplifier on the LRS, you will hear the difference.