I had the A400-x for a short period of time. 200/ch at 8 ohms no bells and whistles. I thought it had more bang than the TFM-25. I think I paid $89 for it so it was a good deal. Sold it for $250 and bought something else Carver. Now that I remember it was in pristine condition. Guy I sold it to said it arrived and the power transformer had came loose in shipping and put a dent in the top. He put it back in place and it still worked perfectly!