I have heard both the 500 and the 1000, but with their repective hearpads, I used to have confidence in Grado to use the best pads for their different models, but after hearing my SR80i with Lcush, I'm curious to hear how the 500 sounds with G pads, or RS1i with flats.
Apologies to those members for not discussing the PS-1000 at the moment.
OK. From my experience last evening, here's how it appeared to me. I utilized various tracks from Acoustic Alchemy, but didn't try any other genres other than the lighter jazz group.
PS-500 with G-Cush pads. I felt that the music was effortlessly being played through the headphones. It was airy, but also a great low end too, which kind of surprised me. The sound stage was very obvious. I felt like I was back about 10 rows from the stage. The upper frequencies were not overbearing in the least, but airy as mentioned before. I was surprised at how well it really sounded. I thought the G-Cush pads would hurt the low end response a bit - or, at least from my readings that's how I understood it to be. The comfort level was very good.
RS1i with the TTVJ "Flats": The first thing I noticed after placing them on my head and playing the music was that I felt as though I was in the front row at the concert. The sound was very much "in my face". The instruments had stronger frequency presence. The highs were pushed out and at me. Though, not overbearing, but not nearly as smooth as the PS-500s with the G-cush pads. The bass, too, was very apparent, and present. It was quite strong. The mids were right about where they should be. The "flats" pads were doing their typical thing by creating some ear discomfort at the 30 minute mark for me.
Final summary: The sound signatures in this configuration were much more different than what I had anticipated. In this case, the pads really defined the sound that was being produced to a large degree. This is less apparent when using both headphones with the same pad types (the 414 pads or the other pads from Grado). How do I feel from these results? I think the PS-500 will serve a great purpose when I have time to listen to my jazz or smooth jazz music. Maybe, even with female vocals. The RS1i would be useful if I were to listen to music that would be a bit more aggressive. Sort of like something by Stevie Ray Vaughn or Joe Bonamasso with Beth Hart. They would really excel in that configuration.
Now, for the benefit of the PS-1000 users who feel that the upper end on the headphones might seem a bit too powerful, I wonder if those members had a chance to try the PS-500 with the G-cush pads? I suspect that maybe the sound would be a bit more tamed and possibly a bit more in the range of what they are seeking. But, I only say this out of speculation as I have never heard the PS-1000s, but did own the GS-1000s briefly. I also thought a few weeks back that quite possibly go for another GS-1000 if one were to appear on the market. However, after experiencing the PS-500s with the G-Cush, I'll place a hold on those thoughts for a bit longer.
The TTVJ "flats" are either a love it, or hate it type of pad. In this, I speak more from a comfort perspective and less from a sound perspective. The foam being a bit firmer - and less of it, can quickly work towards cutting a listening session a bit short due to some discomfort. In fact, a few days ago, I had cut a few "donuts" out of some thinner felt. I placed the felt between the pads and my ears and the comfort was a bit better and tolerable over longer periods of time. Also, I don't feel that using the felt really affected the sound capabilities of the pads all too much. I may look further for some thinner foam pieces (1/8" to 1/4" thick) and cut the donuts from that. Again, another mission to see how the comfort would fare.
The source items used for this test. The Fiio E10 used only in DAC mode and fed by my computer. The signal from the E10 DAC, was then fed into my Little Dot I+ with tubes other than stock. For the software to handle the music selections and pushing the output to the DAC was Foobar 2000 and I had the WASAPI driver in use.