I also own the LS25. I have had excellent results with the NBS (Monitor IV or Mine/Serpent II) and the Powersnakes Sidewinder, which are all affordable and "juices" up the performance of the LS25. However, The most significant tweak for the LS25 would be to replace the stock 6922 with NOS 6922 such as the 6H23 from Upscale Audio.) These tube make the LS25 sound like a much more robust and dynamic preap with
Stevemj: I suppose the world is still flat, because you have not traveled around it.