Jbl e80 no sound coming from tweeter

You will need to determine if it's the amplifiers or the tweeter themselves that are not working. If you open up the cabinets and check each tweeter with an ohm meter for continuity it will show if the tweeters are working, in which case the amp is the problem. if the meter shows that the tweeters are blown, you should still hook up another tweeter or speaker to the horn amp to see if it's blown and therefor took out the tweeters.
If any of this sounds complicated, you'd be best off taking the cabinets to the repair shop.

The crossover caps may have failed, or the tweeters themselves burned out. Using a small 1.5 volt cell touched across the tweeter leads should produce a sound. If not- they are burned out.

Swap the speaker with the other one to prove the source is NOT the problem and then get the tweeter fixed.

Some available on eBay for $45 free shipping.

http://cgi.ebay.com/JBL-Tweeter-Diaphragm-EON15-G2-EON15P-1-230-Speaker-/160544013218?pt=LH_DefaultDomain_0&hash=item25612b3ba2

Remove the speaker wire from your amplifier. Using a 1.5v battery place the wire on both ends of the battery. Observe if you can hear a cracking sound on the tweeter and the mid-range. If there is no sound., your speaker is busted and needs to be rewind or replaced.

These are "powered" speakers and any little bit
of distortion can be amplified enough to "blow" it!
Also the amp could be "shorted"! Have your JBL
dealer test it!!!

I would recommend upgrading the E80 and the DSM to the newest software levels:

E80 - 5.52
DSM - 4.12.

You can download the software off raymarine.com and load them onto different compact flash cards. Both softwares are upgraded through the E80 display.

yes you can

FYI - I just took our 2004 Sequoia in because of speaker rattle coming from the front door speakers. Before I could tell them the problem, they guessed what it was. They see loads of Sequoias and Tundras with JBL systems due to the front door 8in speaker, basically, coming apart. His suggestion was to replace only the bottom 8in speaker, because the top tweeters usually are in good working condition. There is a minimal failure rate on the tweeters.

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.

I blew the tweeter in my jbl stadium floor standing speaker. I would like to know how to remove the cover in order to replace the tweeter. I already purchased the tweeter and it is on the way. I don't want to damage anything in my attempt to remove it.