I bought the L-505f made from 2001-2004(model before 505u) back in 2004 from Audiocubes2 website and had no problems with the sale, shipping, transformer, and the unit.
Jones4music said "the 505u and can tell you it is less clear and less focused than the AX7e and 6300 I compared it with". I think that it depends on what you want from a Int amp at this price.
I think people who will like the 505u are people who want to sit back and just enjoy their music not analyze it. The AX7e and 6300 sounds like they bring out more details which is not bad if that is what you want.
Probably the L-550a II does this more than the 550u. Again just depends on what you want and what other equipment you have to find that synergy that produces a sound you enjoy.
The 505f was a very musical int amp and I'll bet the 505u is even more so.
Jones4music said "the 505u and can tell you it is less clear and less focused than the AX7e and 6300 I compared it with". I think that it depends on what you want from a Int amp at this price.
I think people who will like the 505u are people who want to sit back and just enjoy their music not analyze it. The AX7e and 6300 sounds like they bring out more details which is not bad if that is what you want.
Probably the L-550a II does this more than the 550u. Again just depends on what you want and what other equipment you have to find that synergy that produces a sound you enjoy.
The 505f was a very musical int amp and I'll bet the 505u is even more so.