Back-loaded Horn Loudspeakers
The natural, efficient, companions to low-powered amps. These are awkwardly large and rather living-room unfriendly. Although they tend to lack a real kick in the bass (it has been described as a fist with a velvet glove), they provide coherence, transparency, imaging, and a natural midrange that just can't be beaten. My own horns include a ribbon-tweeter that ensures no roll-off at high frequencies and enables razor-sharp transients. The crossover is an L-pad design with no components at all in the signal path to the main wide-range driver.
My wide-range drivers (Fostex FE208E∑) have cones made from banana plant fibre: this is 10x lighter than paper so is able to track complex waveforms more quickly and accurately than traditional drivers resulting in what audiophiles call a very "fast" loudspeaker.
Kirishima horns like mine. They need to be this big to get the bass-response flat down to that all-important 40hz (low E on a bass guitar).