As far as reverse wiring or phase adjusting, 0-180 is the exact same thing as reversing the wiring, but from the controlled tests i've personally messed with it's hard to tell whether there is a big difference between your sub playing forward or backward as far as polarity goes.. Every setup is different, wont hurt trying it out for yourself. Home audio subwoofer reverse or normal phase? Jun 28, 2005 #21 Thanks, thats what I was going to go with but thought I should get advice before I start building. Subwoofer phase: normal and reverse?? Subwoofers. So, if your receiver's crossover is set to 80Hz, what you first need is a pure 80Hz tone on a CD (or DVD). The sub-woofer is a Sony, on the back it has knobs for Hz and the volume level. Mr. Lamb Fries Full Audioholic. Well I have an alpine x305 deck and when I play the right piece of music, I notice cancellation and I have to switch the subwoofer phase from normal to reverse every now and then to get it louder/in phase. It also has a switch for the "phase" between normal or reverse? Go. If you have an SPL meter and you want to get more technical about setting the subwoofer's phase properly, what you want to do is figure out which setting provides the most output at your receiver's crossover setting. I am very uneducated when it comes to speakers and audio in general. I just bought a new sub-woofer to pair with my Sharp sound bar. But there’s a much more precise way of setting the phase control that guarantees perfect phase alignment between the subwoofer and main speakers. Wanting to Buy/Trade Head Unit Classifieds Amplifier Classifieds Speaker Classifieds Subwoofer Classifieds Miscellaneous Car Audio Classifieds Miscellaneous Classifieds ... Normal or Reverse Phase Thread starter james33440; Start date May 18, 2003; Forums. First, reverse the connections on your main loudspeakers so that the black speaker wire goes to the speaker’s red terminal, and the red speaker wire goes to the speaker’s black terminal. What this switch does, electrically, is the second easist thing to understand on a subwoofer’s wiring (the easiest is the ‘on/off’ switch). Hide sidebar Show sidebar Thread starter itscool; Start date Jun 24, 2005; Prev. The only settings I ever play with on … 1; 2; First Prev 2 of 2 Go to page. The phase does just that, it is like switching the + and - going to the woofer, if you have all your speakers IN phase with each other (what you normally want to do) then they are all pushing the air the same way at the same time, if you reverse this like you did on the woofer, then the woofer will be pushing the air at the opposite time that the other speakers are. Most subwoofers have a switch on the back that’s labelled ‘Phase’, and has positions of 0 and 180 degrees.