Interesting you mention the Rectalinear X. I tried to find a pair unsuccessfully in the late 1960s. I found it a fascinating speaker, sort of an augmented full range speaker with a whizzer cone mid range used from 100 Hz to 8kHz, a 10 " acoustic suspension woofer and a simple 2" cone tweeter. Add it used a series crossover and it was a pretty unique design(even today).
Is my Dynaco Stereo 400 worth repairing for resale?
After all the years, I’m sure it needs a good cleaning and at least all the cans replaced.
Will I even break even?
https://drive.google.com/file/d/10BBbN8Vd2_2sgQAoMI8N5CqnWdhASrbH/view?usp=drivesdk