Although it was in June 1987 that the R-50 started appearing in ads alongside the R-100 ( see my last blog post ), in November of that same year the R-50 finally got the spotlight to itself. This ad above appeared on and off until early 1988, getting bumped periodically by an ad for Kawai's additive synthesizer the K-5.
This ad was a big departure from the R-100/R-50 80s themed extravaganza that came before it - with a much more standard title/content/photo layout - and the content efficiently spelling out the features of the R-50, including its polyphony, pitch and pan abilities, on-board effects, pad programmability, Midi out the wazoo, and... my favourite... the alternate sound chips. More on that in a second.
Although Keyboard never devoted a full review to the R-50, it did make the Updates & Short Takes section of the Magazine in the January 1988 issue. Yes, you heard that right. Although the R-50 began appearing in ads waaaaaay back in June 1987, it would be seven months before any kind of review showed up.