Ray, as Audiokin, above implies, the system you described and liked answers your own question -- doesn't it :)!
I.e.:
Single driver main speaker, no crossover if possible / subwoofer for say 200Hz, down. This driver (a Lowther in Rethm's case) has a very strong magnetic field and can/should be able to reproduce dynamics and details in an excellent way. Simplifying a bit, having a very strong magnet and low mms, the driver is usually very efficient; a front-loaded horn also increasing its efficiency even further. Efficiency + dynamics means, that speaker system driven by a lower watt, low distortion amp can produce realistic sound levels AND good/excellent sound and detail. An SET is low distortion within its optimum operating range (remember, we've left the low frequencies out of the set's range).
Indeed some such systems I've heard are more than good, they're spectacular!
I.e.:
Single driver main speaker, no crossover if possible / subwoofer for say 200Hz, down. This driver (a Lowther in Rethm's case) has a very strong magnetic field and can/should be able to reproduce dynamics and details in an excellent way. Simplifying a bit, having a very strong magnet and low mms, the driver is usually very efficient; a front-loaded horn also increasing its efficiency even further. Efficiency + dynamics means, that speaker system driven by a lower watt, low distortion amp can produce realistic sound levels AND good/excellent sound and detail. An SET is low distortion within its optimum operating range (remember, we've left the low frequencies out of the set's range).
Indeed some such systems I've heard are more than good, they're spectacular!