Curious if any upright players have used this. Aguilar makes great stuff in general, but I have not had the chance to try this. I'm not really digging my EA doubler so far, after having tried it in very wide variety of sized rooms / venues, and different speakers, but like the general light weight/portability that this one also offers. I have a preamp situation where two channel is not a concern anymore. Appreciate any input. Thanks!