No, I haven't. Uriah has the same amp as I and he posted about putting a cream in it. He gave it a glowing thumbs up so I took the leap. In looking at the G10 spec sheet, it's a 40 watt, 98 db speaker and here's how Celestion describes it's sound: "blending unmistakable Alnico class with a rich low-end, creamy mid-range and vintage chiming top-end. Springy, warm, revealing and highly expressive". What's not to like? My guess is it's probably a little warmer than the cream. The limited edition PRRI's are 15 watts besides having a 12" speaker. I can tell you that the Celestion speaker vastly increased the amount of sound coming out of the PRRI. It's huge and clean and rivals my DRRI.