JBL Monitor Users: You might want to read this! (SRX712m content)

[endgroove]

In my recent studies I have found that the most guitar interaction occurs in the range of 100-300 Hertz. In air that corresponds to a wavelength of roughly 1-3 meters. Most guitar players are within 1-2 meters of the cabinet so it is not at all surprising that a polarity reversal would be make a difference.

Also, we tend to prefer the pick attack with positive pressure, for whatever reason. If the speaker is wired in reverse there will be negative pressure on the pick attack.

I gotta say, this kind of thing is why I lurk about in these parts...

 

[Dramelot]

Its easy to test. Stand in the same location, get a note to sustain. Reverse the speaker polarity and try again. its actually the reason I noticed the JBL was wrong in the first place because I couldn't quite get my guitar to sustain/feedback very easily or at all until I reversed the speaker.

Well I guess my K12's are wired right (always wondered after Jay's K10 thing) because i can milk them forever depending how I stand!!
But really who woulda thunk?
When I work on my stuff (connections) a battery is always avail to test polarity and it gets used! But I never have needed to open the K12's

 

[Reincaster]

Oh, and BTW, JBL convention is backwards relative to all other speakers, IIRC.

My question through this whole thread is... Why are they backwards? Interesting stuff here! I remember reading years ago, (in the SR days) that JBL was transitioning to the Positive to red standard like everyone else, but it seems that is not the case yet?