As far as Receivers go, the first Receivers following the 2600 series were the SRs. The TOTL was the 70 wpc SR-8000 with with full-blown digital tuner. For some reason, the European market got the much more powerful (130x2) SR-9000G, which had some minor cosmetic changes, but looked basically the same. These were the first Marantz Receivers with Power Meters, albeit LEDs. The lower models had Analog Power Meters.
Next in line, around 1982, was the SR-81000DC, also at 70 wpc. This unit moved the game along by including a Microprocessor controlling all the functions and a built-in timer. It was also the first Marantz to include a built-in EQ. The Seperates also followed this trend. This was the last of the Marantz Receivers to be made by Marantz Japan. Following that, they were outsourced. I still consider the SR8100DC to be one of the best looking Receivers ever.
Following the SR-8100DC came the SR-940. This was the first Marantz Receiver with a Remote Control. It was also the first with fully digital controls. Power was increased to 100 wpc, but the faceplate was now plastic. The SR-940 came in Gold, Black and Silver.
Up next in 1985, was the TA (Tuner Amplifier) Series which were designed to look like a combination Tuner/Amplifier rather than a Receiver. These units featured a dramatic price drop and tremendous performance for the money. However, the faceplates were the cheapest plastic available and looked almost toy like. They had seperate 5-Band EQs for each channel and burly power amp sections with huge heatsinks. The TOTL was the TA-165 (which on the front says ST-165 and SM-165) at 165 wpc. A couple years later, this was topped by the TA-170, which had the same power output but included some limited video features. These also came with remotes.
Then there was what can only be considered the "bottom of the barrel", the SR-3600, the first "Home Theater" Marantz Receiver with Dolby Surround. It was rated at 120 wpc x 2 for the front channels and 20 x 2 for the rears. The front channels were "bridgeable". However, the construction quality was very poor and these units were made by Funai. Did I mention "ugly"? The faceplate was held on with glue! These were truly bad and, I believe, greatly responsible for Marantz's "bad rep" during the 80's.
Following the SR-3600, Dynascan, the makers the the Cobra CB Radio, briefly took over and took Marantz in another direction. The flagship Receivers were the "Century Series", headed by the RS-3559. Metal faceplates returned as did sophisticated design. The RS-3559 came in two flavors, basic black and a stunning champagne/gold with real rosewood side panels. Julian Hirsch commented in Stereo Review that it was one of the most handsome pieces of audio gear he had ever seen. Although it was also a Home Theater Receiver, and rated at 125 wpc for the fronts, it tested out at 178 wpc and, once again, restored some credibility to Marantz for significantly under rating the power of their Receivers like they had with the 2325 in the early 70's.
That pretty much covers Marantz Receiver from the 80's.
-- Chris