I have a Crown SL-1 in one system with a Crown PSA-2DX. I have been trying to find a Crown PSL-2 to match my Crown PFM-3 and Crown D-150A II, in another system. So far I have not seen many PSL-2 preamps and when I do they are expensive: $350 for a parts/repair unit or $550+ for a working one. I have come across another SL-1 at a very reasonable price ($150) and wonder if anyone has heard a PSL-2 compared to a SL-1? The PSL-2 has the addition of bass and treble, different tape routing/looping and 1RU (PSL-2) Vs 2RU (SL-1) and the PSL-2 cosmetics match the PFM-3. The Sl-1 has separate phono modules of which I have two: MM & MC; the PSL-2's phono section is internal and MM only I believe. Having said that, what's the sound differences if any? Does anyone know or have experience with these two Crown Preamps?