I recall an audition in 1975. I was a college kid shopping for way beyond my means speakers. The place had JBL L-300's (huge boxy speakers with 15 inch woofer and horn midrange and tweeter, $1800/pair as I recall). Yeah they sounded good (like good artificial hifi is supposed to sound). Then the sale man switched over to another set (without telling me what I was listening to) and asked what I thought.
Well I didn't know what to think. They sounded different but somehow "right". Then he asked if I could identify which speakers in the small room crowded with speakers were playing. Not until I walked right up to them did I identify the Fried Model B's. But it didn't "compute". All that bass from maybe 2 liter LS3/5a clones? Then he pointed to the Fried mass loaded transmission line loaded bass "coffin". These were the 2.1 Fried Model H.
I was stunned and confused at my first audio epiphanies (proper non-exagerated sound and the effectiveness possible from a separate bass unit). He handed me company/product literature and left me to study them for months until I could get back there again. That sound wouldn't leave my memory. A year later I owned the Model B's and two years later I built the two cabinet version of the "coffin".