My pioneer Elite c90 /m90a separates are from late 80s. Cutting corner should be clearly visible when compare to 70s. So lets See some pics.
Pioneer spec 1 and 2
These are from 70s. Some say its high end. And build quality? Single transformer in power amp and preamp. Huge cutting corners visible here. But chassis is build like tank. Pity that Inside build quality isnt better
Now, King of kings pioneer sx 1980
What we have here? King of kings, prices for this receiver are very high and build quality? Single transformer for everything, tuner, amp, preamp, lights etc. Huge cutting corners here. Why is this "King" with Such a mediocre build quality?
Now amplifier from late 80s. Pioneer Elite c90a /m90a
This is combo from late 80s. Cutting corners should be clearly visible. But what we have here? Power amp: 2 oversized transformers. Dual mono construction. Copper plated chassis. High grade components used here, brass cap resistors, film capacitors. OFC wiring, 70um thick pcb tracks. Preamp looks a bit messy. But still preamp has 3 transformers which was unusual even in the 80s. Phono stage has 2 step up transformers also unusual even in the 80s. Even in the 70s step up transformers in phono wasnt standard. High grade components used in preamp like mylar Capacitors, polystyrene film capacitors, polypropylene capacitors, mica capacitors, brass cap resistors. OFC wiring
Front panels are not plastic but its aluminum.
Of course there are down sides. Chassis construction is Less sturdy than Spec build quality. ICs are used which are custom and unavailable today. Plexi is used instead of Glass. But it doesnt have effect on sound.
But still pioneer Elite looks much better over all than these amps from 1970s
And pioneer sa 9800
This is the best build quality? Single transformer? Kinda huge cutting corners visible here. Pioneer Elite c90a /m90a has 5 transformers and separate power supplies. Sa 9800 weights 39 lbs, pioneer Elite c90a/m90a weights 70 lbs!
Pioneer Elite c90a/m90a build quality is much better than są 9800. Its no contest here.
Pioneer in the 80s was making very good amplifiers, even better than some amps from 70s.
Pioneer są 9800 cost in 1979 was 750 USD. Its 3100 USD after inflation adjust.
Pioneer Elite c90a/m90a cost in 1988 was approx 2750 USD. Its approx 6900 USD in today money
SA 9800 was much cheaper than pioneer Elite c90a /m90a combo.