Originally Posted by Chad T
Got my R3 surrounds in today.
1. Awesome packing job as usual!
2. I've put off buying R3s until now at least partially because I've had trouble justifying the expense of the R3s when compared to the other Diva .1 speakers. Now that I have them in my house, I can say that their cost is justified. They are much larger/heavier than I thought they woud be. Truly a beautiful set of speakers!
3. I'm confused about the wiring/configuration of these R3s just like I was when I got my R2s. At some point, I'll probably open these up and have a look at the wiring and internal construction like I did with my R2s (click HERE
for more info), but for now as I try to figure this out...
a) Both Oz and swanspeaker.com refer to these as dipole.
b) TAI refers to them as a "true" dipole.
c) I did a polarity check on the speakers and found that both drivers move in the same outward direction. This would indicate they are bipole, not dipole.
d) In post #327 of this thread, Jon recommended mounting speaker "A" to the left and speaker "B" to the right. Oriented mounting would indicate dipole.
e) I dug through the old archived Swan thread and there are references to these as being non-mirrored, adaptive dipolar, but that thread is old and things can change.
So I'm thoroughly confused!
But combing through that info, I'm gonna guess that they are adaptive dipolar, but I'm not sure if they are mirrored or not. If they are mirrored, that would have to mean that Swan changed their wiring at some point. If they aren't mirrored, then point 3d wouldn't make sense.
I finally got a chance to look into this further. I unscrewed the speakers in the R3 surround with the "A" serial number. What I found is that the wiring that connects to the terminals on all 4 speakers matches polarity. i.e. positive-to-positive and negative-to-negative on all 4 speakers.
But it gets interesting when looking at the crossover network. There are two crossovers inside:
1. One of the crossovers connects to the pair of woofers. On this crossover there are two sets of terminals.....one of the pos/neg terminals has a wire that leads to the input jack and it matches polarity. The other terminal connects to the woofers in parallel (i.e. one wire connects to the first woofer, then another wire goes from that speaker terminal to the other woofer).
2. The other crossover connects to the pair of tweeters. On this crossover there are again two sets of terminals......one of the pos/neg terminals has a wire that leads to the input jack and it matches polarity. Here's where it gets interesting:
the other terminal on the crossover has a red mark (done with something like a Sharpie marker) over the negative terminal and a black mark over the positive terminal. So this reverses the polarity. But the crazy thing is that the tweeters are also wired in parallel so this means that both tweeters are out of phase with both woofers.
From what I understand, bipole speakers are wired with matching polarity on all 4 speakers. Dipole speakers are wired normal on one side and in reverse polarity on the other. i.e. this puts the woofer/tweeter combo on one side out of phase with the woofer/tweeter combo on the other side.
Then there are variations like adaptive dipole (AV123 does this with their RSS300 surrounds). This simply means that the rear facing tweeter is wired in reverse. That way the woofers are still in phase (so you don't lose the"oomph" that can happen when woofers are out of phase). Yet, you still get a somewhat diffuse soundfield from the tweeters being out of phase with each other.
I have never heard of having both tweeters wired in reverse polarity and both woofers wired normal. Unless this is some kind of unusual polar wiring variation exclusive to Swan, I'm beginning to wonder if my R3s are simply incorrectly wired.
Edit: BTW, I'm not upset or anything.....it's just the techie side of me trying to figure out what makes these speakers "tick", so I can best implement them into my setup.
I've continued to search the net reading about dipole, bipole, etc. and haven't come across anything else that is wired this way. I'm mainly just looking for input to find out if this is normal or not, and if so, the science behind it.