I purchased my speakers brand new in 1980. They are still functioning at their peak to this very day. It is a very rounded speaker. I guess its most outstanding feature is the fact that it sounds the same regardless of the volume. Clean, noted music, with just a touch of color. Only the deepest bass passes these speakers. I do admit they desire a sub.
Without the sub you will still be rewarded. Of course your equipment makes the speaker sing.
Mine are powered by a Dual MosFet system housed inside my Sherwood S6040 CP Push/Pull DC Power Amp. Old school NAD 114 Pre-Amp. Producing some of the warmest sound for ears. Through the one and only "HPM 100" Loudspeakers by Pioneer. Circa 1980!