You're supposed to find that out after we have you bust holes in a couple of walls to flush mount them.
You're supposed to find that out after we have you bust holes in a couple of walls to flush mount them.
I know, movin' the 501 Macdaddys is tough enough, My wife would love these 43's built in, that would solve the "decorating" nightmare she's struggling with...
"It only costs 80% extra to go first class"
OK, I reinstated the external wiring back to what I know is correct AND swapped the internal wires on the woofer for the left channel. Plugged in the Phonic and all is now in phase and sounds great. So, the Green w/ black stripe wire is now on the + terminal and the solid green is on the - terminal which is backasswards per spec. My question is now... how in the hell could the polarity get reversed on this one woofer and the only known repair through it's history is a refoam? Original factory error?
"It only costs 80% extra to go first class"
Check how the other woofer is hooked up....
The other woofer is per spec. Green w/ black wire to - terminal
Solid Green to + terminal
"It only costs 80% extra to go first class"
That's strange as hell!
This question is recurring all the time. My answer is buy a sub use your speakers as mid bass. With todays CD more bass is encoded with more DB in the recordings.The old vynils had a cut off at 100Hz in mono.
Here is a good choice for 20Hz to 85Hz then switch
your speakers >85 HZ
http://www.jblpro.com/pub/cinema/4641.pdf
.................................................. ...................................
Well, we're back where we started:
Battery test both woofers.
Phonic's reading (+) polarity, I betcha....
OK, I'll do the battery test and post my findings...
"It only costs 80% extra to go first class"
If the battery test doesn't show a polarity problem with the bass driver terminals, you
might want to just trace -all- of the internal wires: input terminals to crossover,
then to each driver...
-grumpy
Here's a pic of my "battery testing lab". Now this may be off post so I will re-post new for others to see as well.
I checked the polarity of the woofer in question and son-of-a-gun if it isn't wired back-ass-wards. (or the terminals were reversed) When I apply the + to + and the - to - the cone moves inward. When I switch them around the cone moves outward. So the mystery has been solved, thank you Z-Man for the urgency of doing the batt check. My Phonic was right on too. The bass has improved along with the imaging. Much better.
I would still like to know how this could have happened. Maybe the terminals got switched at some point? I wouldn't think a refoam would have anything to do with it?
"It only costs 80% extra to go first class"
It's supposed to work that way. If the other cone is moving outward on a + to +, it's backward.Originally Posted by invstbiker
JBL has been out of phase with virtually every other manufacturer of loudspeakers for decades, though they finally changed and now they share the same polarity as the rest of the speaker world.
http://www.jblpro.com/tech-library/J...eN1V12C_v5.pdf
It is one of Bo's favorite topics and it has been discussed a lot. If you are bored one night do some "polarity" searches.
Widget
Well this is really getting confusing now...
"It only costs 80% extra to go first class"
Now that you know that they were out of phase in respect to each other, you can fix your pair.
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