The tweeter and upper mid-range speaker quit working in one of my JBL s412p speakers. All wires are connected. Would this be a cross-over assembly problem? If so, where can I purchase a replacement?

It's a big job, but the results are great. Bi amp-ing is where the tweeters and mid range speakers are separated and connected to separate amplifiers. You'll need to have the correct gear before messing inside your speakers. You'll need to have another amplifier. Not knowing what amp you have now, getting a stereo signal into the second amp may be a problem since you'll need a line level signal into the second amp. An external crossover is best. Technically, you could use the ones in the speakers, since you'll be removing them anyway. Now for the speaker mods: On the panel where the posts for the speaker wires are you'll need to install another set of binding posts. We're assuming you have separate subs. Open the speakers and remove the cross over. The wires from the original posts should now connect to the mid range speaker. Add wires from the second set of posts and wire it to the tweeters. Now connect the output of the amp to the removed cross over and wire the mid range out on the cross over to the posts that connect to the mid range speaker. Do the same for the tweeters.If you have three way speakers, you'll have to run a 3rd set of wires from the crossover to the woofers in the cabinet using another set of binding posts. Controlling the volume on the second amp will be difficult since you'll have to adjust it manually. Remote control volume level will be lost on the second amp.

If that is the only problem, then don't worry about it.

first off stock wiring for speakers,and or amp are with minimal wiring.Rewire system for better sound quality,also use noise suppresors if needed.

hi,
check the tweeter and mid range. its coil may become faulty.
for checking the speakers carefully remove the speakers one by one, remove its connections.
and check the speakers with a AAA cell. is it producing cracking sound. if not the speakers coils are burned.
ok

It's a midrange component speaker. Possibly your midrange speaker is blown. Check your wiring.

You hear the tweeters i am assuming because the vehicle has tweeter component speakers that are separate from the midrange and low components.

Any wire with a black stripe on in is usually negative

the conductor xxx\blk is the minus or black( from speaker) the outher is positive\red pin from speaker) the woofer is bigest speaker inside is connected on the crossover at low output, tweeter at high output, if you connect wrong you can burn speakers and crossover, you can test with very low volume on amplifier.

1st connect low to woofer, it only her low freq below 500Hz like drums and bass, if connect on med out the speaker is working as handpocket old radio audio. if connect on high the speaker is like no audio out. (the woofer take about 60-75% of amp power).

2nd connect the midrange at mid output you can listen to human voice cristal clear. if connect on high output you listem like esteric female shouting.

And connect the tweeter at the empty output

Take particular attention on polarity terminals, if you exchange the polarity you have a moofle sound traped inside of speaker, and some structered box noise who may open the box panels in future.

Try jumping the sub by connecting the speaker cable directly to the speaker , not just the connector on the back

The tweeter is not the problem. The Eons use the vents below the tweeter to cool the amp and woofer. Sounds to me like you have a power supply problem in the amp, possibly a bad capacitor or diode. You have to check the amp for proper operation.

If the only problem is the tweeter, and the woofer is still working, you do not have a problem in the amplifier. The problem is the speaker. The tweeter is blown or you have a problem in the cross over network in the speaker.

You can always switch the speakers and connect them to the opposite channel. You can do this very easy at the back of the receiver where the speaker wires are at. Put the left speaker wires on the right speaker and the right speaker wires on the left speaker. If the same speaker still has no tweeter you know that the speaker is the problem.

The only way this could be a problem in the amplifier is if you have two different sets of inputs for each speaker, one being the low end for the woofer and the other being the high end for the mid range and tweeter. That would mean you have two sets of speaker wires going to each speaker. Each set of speaker wires would have a positive wire and a negative wire for a total of 4 wires going to each speaker. I don't remember this system being set up that way, but I could be wrong.

I hope this was helpful, you should be able to get the speaker fixed at an authorized Kenwood repair center in your area for a reasonable price. As a guide, my shop only charges $25 for the labor plus the cost of the tweeter to replace a tweeter. Any other shop should be similar. Kenwood does sell replacement drivers for almost all of their speakers.