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Posted on Jan 02, 2017
most of the time when a high power amplifier starts making noise not all the time but every once in a while or even all the time its the ground, if the amp turns on its not the power cable. try moving your ground to a different location or try using double grounds. the better the ground the better the sound. and as for turn on pops, put a toggle switch inline on your rem wire and turn it on after the car is started.
Posted on Oct 04, 2006
SOURCE: Powered Subwoofer won't work
This problem has many causes... but try this one... often when a faulty subwoofer speaker is to blame this test will tell you. Connect another speaker(any speaker) temp to check if there is audio still to the sub. Keep the levels down to ensure you dont go on a trail of destruction.
The spider wires from terminals on the speaker to the cone may be intermittent. I have seen this a lot on all types and makes of subwoofer driver!! This a common failure and can often be detected by tapping the speaker cone when it does the cut out thing. If it starts up, and they often do..., then you probably have intermittent spider wiring to the cone. A GOOD “Hi Fi speaker repair dood” can help here and replace the spider wires for you and save the expense of replacing the driver.
This is just one solution to the problem you are having.... there are many more..... and you should try this FixYa and see what happens. If you cant tell WTF then hit me back up here again. I work WITH YOU, to get the problem out for you.
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Posted on Dec 28, 2007
There are many different ways that an amp can fail but the two most common failures are shorted output transistors and blown power supply transistors (< those are not blown). There are several types of protection circuits in amplifiers. The most common are over-current and thermal. The over-current protection is supposed to protect the output transistors. Sometimes it doesn't work well enough to prevent the failure of the output transistors but it will work well enough to shut the supply down before the power supply FETs are destroyed. If the amp remains in protect mode, goes into protect mode or blows the fuse as soon as the remote voltage is applied, shorted output transistors are almost certainly the cause.
If the fuse protecting the amp is too large, if the protection circuit doesn't respond quickly enough or if the power supply is poorly designed, the power supply transistors may fail. If you see a lot of black soot on the power supply transistors (near the power transformer), the power supply transistors have failed. Soot on the board doesn't necessarily mean the transistors have failed. Sometimes, technicians don't clean up the mess from a previous failure.
In general, when a transistor fails, it will either short (common for output AND power supply transistors) or open (common for power supply transistors). Transistors act like valves. They control the current flowing through a circuit. A shorted transistor acts like a valve that's stuck open (passing too much current). In the case of an output transistor, the shorted transistors tries to deliver the full rail voltage to the speaker output terminal. If you've ever seen a damaged amp that pushed or pulled the speaker cone to its limits when the amp powered up (common on some Rockford amplifiers), that was almost certainly due to a shorted output transistor. When checking transistors, you most commonly look for shorted connections inside the transistor. You do this by using a multimeter to look for low resistance connections between the transistor's terminals.
I used the terms short and open on the previous paragraph. A short (short circuit) is a path through which current flows that should not be there. An open (open circuit) is a break in the circuit.
Posted on Dec 30, 2008
are u sure u have them running at the right ohms, for not only the subs but the amp too...if you go lower than your amp is rated you can fry stuff...via protect mode......hopefully this helps
Posted on Mar 21, 2009
Tips for a great answer:
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