My RS1i Grados arrived today. The pair I had purchased had a bad cable due to a dog chewing up the cable. The owner cut the cable off and left about 3" of cable left outside of the cups. I had another Grado cable, so I went ahead and connected up that other cable and just used some shrink tube to cover the joints for now. Probably the most ghetto RS1i out there ... just kidding, as it doesn't look half bad and will suffice until I finish up the recable work in a week or so.
The remainder of the package was complete. Heavier cardboard box from the factory, not the thinner pizza box like the other models. The 15' Grado extension was included, as was the 1/4" to to 3.5mm Grado adapter. The cups were in excellent shape - and, did look very good as the seller reflected a 9/10 condition for the headphones.
Since I just had the GS1000 headphones a week ago, and now the RS1i, I'm basically going from memory to try and make some observations on the differences. The GS1000 had a very nice airy presentation and the detail was quite good. Also, the GS1000 had a remarkable sound stage as has been observed by many. But, I don't think I'm a big fan of the G-Cush pads.
The RS1i on the other hand, has a stronger mid-range presence. The upper frequencies are not nearly as "Grado-like" as their lower line as well as the GS1000. Yet, the detail is very present. The vocals on the RS1i are stellar. When I had some Johnny Cash playing earlier today, I don't think I've ever had such a moment where I could hear his voice so well. This includes other headphones, as well as my 2.1 music system. To me, the RS1i seems more like the MS-Pro from Alessandro -- but, I know it 's not. I'm much happier to have the Grado signature sound of the RS1i as opposed to the MS-Pro which could have the highs tamed a bit and the mids increased. However, the RS1i is not fatiguing on the upper end, nor is it lacking in the mid-range area at all either.
As I move back to Grados from the orthodynamic scene, I'm pleased with their lighter weight. The comfort really pleases me and I didn't realize how bad I had missed it.