AudioBird

I currently have both in my living room, doing an A/B test. Feel free to ask me any questions. Both have sub outs. You should absolutely positively get the Sixes if you’re looking for bass performance without a sub. Their bass performance is on a different level from the R-15PM. The R-15PM are more detailed and airy, coming from their excellent high end. The Sixes are warmer—I wish they were a bit more like the R-15PMs in the high end—but the bass extension on The Sixes extends easily to places the R-15PM just can’t go. There are low frequencies you wouldn’t even know are present in the recording from the R-15PMs, but they sing from the Sixes. Unless you’re doing home theater, you probably won’t need a sub with the sixes. For the R-15PMs to compete in bass, they would need a sub. This is not to knock The Sixes’ detail and high end, which is damn good in its own right—I’m just contrasting with the R-15PMs. My bottom line is this, and this is why I’ll be keeping The Sixes: I can study my music in more detail with the R-15PMs, but I have headphones for that. I can make my house rock with The Sixes.