Had my first rehearsal with the G n' R tribute band I just joined last night (I'm playing Izzy). This was also the first time I was able to really turn up my recently purchased JCA20H and matching 1x12 cab. First off it was really cool that I was able to keep up volume-wise with the guy playing lead as he's playing through a Peavey 5150 Head with Marshall 1960A cab. However, it was quickly apparent that my amp sounded like it had a blanket over it and was just not cutting through the mix as it should. I had the Gain about 1/2 way up the EQ was set relatively flat with a bit of boost in the mids and highs, Master was 1/2 way up and Presence was about 3/4 the way up. The lead player also had a Hughs & Kettner 4x12 (not one of the crazy expensive ones) that has Celestion 70/80's in it. I plugged into that and it was like playing through a different amp. It cut through the mix perfectly and had pretty much the tone I was going for. Now, was this because I was pushing more air (4 speakers compared to 1) or would changing out the speaker in the Jet City 1x12 be a good idea? I'm thinking maybe a G12H30 or a Vintage 30 might help things open up a bit more. Keep in mind the amp is totally stock now too. I don't want to really get into doing any mods to it but definitely plan on upgrading the tubes in the near future. Your suggestions are appreciated, thanks.