Signs that one or more of your speakers deteriorated, include intermittent sound, crackling and crackling of the speakers. Not every problem that sounds as a speaker problem, is actually a source for the speaker.
What to check and listen
Before you assume that you bad speaker in home theater or audio system, check for a few common alternative problems.
Change channel
First, connect the suspected faulty speaker to another channel and see if that speaker shows the same symptoms you heard earlier.
Then connect one of the other speakers in your system to the same channel (not at the same time, of course) that the suspected faulty speaker was originally connected to, and check to see if the other speaker sounds bad when connected to that channel. ,
Clear Terminals
If it turns out that the suspected «bad» speaker still sounds defective when plugged into a different channel, you may have a bad speaker. If so, it could be something as simple as dirty speaker terminals. which can be cleared or the internal components of the speaker may be damaged. If you remove the speaker grill — if it’s dusty, clean it — and find that the speaker cone is damaged, repair speaker or do it for you or contact the manufacturer for a replacement. If it’s no longer under warranty, you’ll probably have to pay for a replacement.
Check wire
If you find that both speakers sound bad when connected to one channel, but sound normal when connected to another channel, replace speaker wire connecting speakers to that channel and see if that makes a difference. If both speakers sound normal with a new speaker wire ( check the wire before using it ), then you found that the old speaker wire was the problem, and now you should get back to work.
Check connections
If you have determined that both speakers sound fine on other channels, and you replace the speaker wire of the channel where the problem first occurred with a good speaker wire, but any speaker connected to that channel still sounds bad, then the amplifier for that channel may be bad, or the connection is not making proper contact.
The problem can be as minor as dirty or broken solder joints at the point where the amplifier or receiver circuit board connects to the inside of the speaker terminals.
If you don’t notice any breaks in the solder joint, the problem could also be a shorted circuit or something else in the audio circuit that needs a more thorough repair or replacement.
Open the lid on your amplifier or receiver (unplug it from the electrical outlet first!) and perform a visual inspection. If the inside of the amplifier or amplifier section of the receiver is dusty, use canned or compressed air to remove dust . Then put the cover back on and see if that fixes the problem. If you don’t see anything that’s visibly wrong (the inside is clean and you don’t see any disconnected wires), it’s time to call tech support to determine the extent of the problem.
Volume Master
If all your speakers seem to be turning on and off, popping and popping, especially when you turn the volume up and down for the entire system, you may have a dirty master volume control.