This is an uncertain answer, because the combined machine and the front and back power amplifier have the quality of the points, it should be said that when the quality is the same (the level is equivalent), the front and back power amplifier's control ability of the speaker is better than that of the combined power amplifier, so the sound quality of the front and back power amplifier is better than that of the combined power amplifier, and the front and back power amplifier has more collocation schemes, and the playability is higher.