that makes perfect sense. Yes the UAD-plugin is the 201. I wasn’t even aware of different versions of the Space Echo. I only knew “the” Space Echo and never looked closely

Yes the CE-1 was the pedal-version of that famous Roland Chorus though I think it was the first device with the “ensemble” term assigned to it. The Dimension D came out a littler later I think. I’ve seen a CE-1 in some studios in the 80s where it would sitting next to the patchbay. Probably because the studio owner coulodn’t afford a Dimension D or other larger Roland devices
But Roland/Boss had so many varieties of their chorus in countless packages, nobody will ever know what was in the studio at the time of the recording of Sultans.

I think the UAD plug-in is a virtual 201, I think only the 301 and the 501 had the chorus. I see the CE-1 as an instrument floor device, I guess there must have been some studio rack device of the effect, too, but you are right, we will never know for sure what it was.

interesting article about the engineer of sultans.
The “Roland Chorus Ensemble” Mark mentions could be the Boss CE-1 though. CE stood for Chorus Ensemble and Boss was a division of Roland. The Dimension D was actually also often referenced as an “ensemble effect”, since it was quite a bit different from an usual chorus. If I’m not mistaken, the term “ensemble effect” was brought up by Roland/Boss as a name for a type of effect exclusive to them rather than a specific device.

I have the Roland Space Echo as an UAD-Plugin and use it sometimes for weird delays. But I haven’t figured out a setting that would sound like the chorus in Sultans. It would do slap-back delays but the delay time doesn’t get short enough to make it chorusing. So I doubt the chorus on sultans was the Space Echo. Of course the actual device in the studio could be modified in some way to get shorter delay times and hence kind of a chorus. But we will never know…