Blue and yellow cables. Which one is +? - Peavey PR15 400w PA Speakers

That is standard UK wiring.

Brown in Live.
Blue is Neutral / Return.
Green with Yellow stripe is Earth / Ground.

https://www.google.com/search?q=peavey+xr+1600d+wiring+diagram

Manual

https://peavey.com/manuals/80301359.pdf

..

In Peavey cabinets, the woofer is always Yellow + and Blue - and the horn is always Red + and Black -. On the mid the remaining two wires would be the lighter color + and the darker color -

In Peavey cabinets, the lower woofer is always Yellow + and Blue - and the horn is always Red + and Black -. On the middle 15" the remaining two wires would be White + and Blue -

Blue should go to red. I assume they used an Asian standard. Rough way to remember- sky blue, return brown/ground is green yellow- same potential as brown. yellow somewhere in between.

However reversed leads are not going to be noticed on the speakers of a single amp/speaker. Or if a multi speaker setup in a cabinet as long as all are mated with the same polarity.

It just translates to the direction a speaker cone is moving in relation to the magnet when the polarity of the sine wave peak is positive.

In a stereophonic setup- many can hear the difference an out of phase speaker can make, in a monophonic setup- no one is going to hear the difference. And on a stage setup, unless the speakers are all attached to the same source, they are all moving independently.

Peavey color indicates that Blue is Negative And Yellow Is Positive, so Yellow goes to + Speaker Terminal.

black and red will goto 1 speaker. and blue/yellow to the other. typically red and yellow are + and black and blue are -. the crossover board might tell you which is which where they solder to it. but i'm pretty sure the black/red goto woofer. try hooking up both to woofer and listen to it. 1 way is going to sound horribly wrong lol. that will mean you hooked up the tweeter leads to the woofer. but DO NOT HOOK UP WOOFER LEADS TO TWEETER. thats why i say to do it on woofer.

NEVER trust colors... with an ohmmeter you can tell which is the common lead by testing... find the lead that has continuity to EITHER switch independently... It is PROBABLY the blue one... this will be the "sleeve" of the plug. The schematic documentation is so bad the jack wiring cannot be decipered as to which contact is the tip and the ring. HOWEVER once you find the common of the switches and connect it to the sleeve you have only two choices for the other wires so just try them.

You can also take the back off the pedal to find which color goes to BOTH the switches... connect that one to the sleeve. Try the other two wires for proper operation before final soldering.

Hi,

The black wire is ground and the red is live, also the yellow is live and the blue is ground. Probably the black and red wires go to the woofer.



Regards.

Way to find out: The minus speaker leads go to ground at the amp and therefore are electricaally connected together... just use an ohmmeter to find which two wires are tied together and connect those to the minus leads of the speakers.

Usually the yellow will be positive... Hint, it won't make a difference UNLESS you drive two of these in parallel as it only affects the phase of the cone movement relative to the input.

Connect the yellow to positive and don't worry about it further.