My AM15 woofer has started cutting out intermittently. I recently moved, so it probably took some abuse. This started immediately after hooking the system up.
I managed to get the cover off and checked the fuse. Although it seemed and checked out good, I replaced it anyway. That is probably the extent of my abilities to diagnose the problem. It does one thing of note, when you move it around slowly (like stand it up on it's face (the horn) it comes on. Set it back down into it's natural position, and it cuts out again. Slight shaking seems to have no effect.
All of the speakers work fine, so it seems as if perhaps a component (in the power system) has a short of some sort. I can replace components (like a resistor, etc.), just unsure of what to test or even how. Any suggestions on what I should test or replace?
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Re: woofer cuts out intermittently
Buy a soldering iron and go over all solder connections on the circuit board. Sounds like you have a cold or intermittent solder connection. Also make sure the problem isn't in the subwoofer cable. Don't be afraid to do a little soldering, and just make sure you don't create "bridges" between existing solder connection. Only heat the connections long enough to melt them and add a little solder, as excessive heat can destroy sensitive components. Before doing all this, remove and reinsert all related cables into their jacks several times, as these connections can become oxidized and make poor contact over time.
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Does the tweeter keep playing when the woofer cuts out?
It is rare for a speaker to cut in and out, check all wiring connections and if possible connect it to a different amp to test, the amp can cut in and out just like a speaker. Try switching it with another speaker and see if it cuts out aswell.
from our experience rebuilding woofers once the lead wires get pulled too much or start to strain you have been running too much power into the woofer and making the cone move too far in and out.You need to cut the input signal from your preamp down and cut the volume down on the speaker input on you eon. We keep seeing too many of these amped speakers blown from too much signal.
If the horn cuts out after some usage ...then its probably the limiter lamp that is gone .... the limiter lamp is switched into circuit once the " polyswitch " gets hot .... so at first the horn works ...then when the limiter lamp is switched in ...nothing !
its just a standard 12volt car tail light lamp ...let me know if this helps
I am an Electronics Tech and just finished repairing a LW12 for a customer. It also has the HUM. IF I place a finger on the RCA input and another finger on the heatsink..(black metal plate at the back) then the hum goes away. I did notice that Cerwin V maunfactured this older LW12 unit with a 2 prong cord. I personally own a newer CV 10" sub, 3-prong and has never had a problem with it and it has awesome Bass. So for my customer...I am thinking I will add a 3-prong cord. and see what happens.....