Pioneer made some serious receivers back in the '70's.

The SX-1980, for example, is something, the likes of we'll likely never see produced again, a monster of a thing, most definitely from the heyday of hifi.

Massive in every way, physically and one heck of a powerful thing, in fact the most powerful receiver ever manufactured, to date.

270 wpc @ 8 ohms, and still tested to be way more than that, in fact in one test, it was found to be producing nearly 460 wpc short term power, under the test conditions used.

Some years ago, when my daughters were little girls, they are 25 and 21 now, The older guy I'd bought my first Pioneer PD-91 cdp from, invited me down to his home, so he could re-attach the cdp's laser lens, which had become detached during courier to mine.

Anyway when my friend and I entered his rather nice home, we were taken to an Aladdin's cave of desirable amps, cdps etc, including said SX-1980 - 22 inches wide, 19.5 inches deep, and 8.25 inches high, all 35 kg's of it.
Of course we talked about it and other beautiful pieces he had, some for sale, some being repaired, some part of his collection.

Unfortunately we didn't get to hear the SX-1980, it was being repaired, but once you've seen one in the flesh you never forget. One of those rare, extravagant, statement pieces all the Japanese manufacturers would produce, competing with each other, during the 70's / 80's hey day.

en.wikipedia.org/wiki/Pioneer_SX-1980

www.tapeheads.net/threads/the-legendary-pioneer-sx-1980.326/

gearforlife.com/best-vintage-receiver/