The CJ is phase inverting, not "is not" as stated in your post. It has a single stage of voltage amplifiction, which by it's nature inverts the phase. To correct this in the pre-amp would require another stage of voltage amplification. CJ has decided that a simpler circuit is better so they only have the single stage. I'm sure that some other designers use this approach, but there are many ways to achieve good results in electronic design. Reversing your speaker leads returns the signal to the same phase present at the inputs to the pre amp and has absolutely no affect on the operation of the power amp.
Some people are sensitive to this and some aren't. Try your speakers both ways to see if it makes any difference to you. The complicating factor is that many recordings are phase inverted because many studios don't pay attention to this during the recording process. With multi-track recordings, individual instruments may be out of phase with each other.
Some people are sensitive to this and some aren't. Try your speakers both ways to see if it makes any difference to you. The complicating factor is that many recordings are phase inverted because many studios don't pay attention to this during the recording process. With multi-track recordings, individual instruments may be out of phase with each other.