I have two amps for my 12's but after my bass hits hard one time the drivers side amp powers off and it wont work again until i turn off the stereo and turn it back on. The system has been he same for a couple years now so what would cause this to all of a sudden happen? Thanks a lot.
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Signal getting to and from the Amp is problematic, if you do not have the correct wiring that will carry the necessary power then you are never going to get the sound you are looking for. Start with testing the AMP and then Wires....
probably the amp going to safe or protect mode judging by the fact that you have 3 subs wired to it i would say it is not 1 ohm stable try disconnecting 1 sub and see if it still happens this will be running a 2 ohm load rather than 1 if it stops happening then you need to figure out a better wiring configuration that will work with your amp.
First off, never, ever replace a blown fuse with a bigger one (especially one that is almost twice as big) unless it's an absolute emergency. Most of the time, the reason a fuse blows is because of a problem with the device (in this case, the amp). By installing a larger fuse, there's a very good chance the problem will become permanent (i.e. busted amp).
The amp could be going into an overcurrent mode when the bass hits and power cycling itself to try and reset the problem. If this is the case, take it to a local electronics repair shop and see what they can do.
It's also possible the input voltage to the amp is dropping too low during the bass hit, making the amp restart. Try putting a 1.0F or higher capacitor on the battery to buffer the power during the bass hits.
Had a similar problem, mine was a power problem. Power meaning voltage. Those big bass speakers draw lots of power. My original alternator couldn't keep up.
Question: Do your headlights dim in rhythm to the bass hits?
If so, your sound system wants more power than your vehicle is producing.
My first solution was a high output alternator. It worked great.
Then I added another amp. Not great anymore.
My second solution was to tie in a large capacitor to the amps power supply. (These a big (1 farad), about the size of a Pringles can)
Your amps power consumption is not uniform. Each time your amp punches the bass, it draws extra power. If that power isn't available, it starves and shuts down (if only for a second) then restarts.
The higher the gain, especially using a low pass filter, the more power needed for each thump. Thats why when you turn the bass down, you can get higher volume from the rest of the system.
How a capacitor can help (simply put): In this application, the capacitor acts like an auxiliary battery, smoothing out power fluxuations. The capacitor builds up its charge literally between bass hits when power demand is low. Then releases it's charge when the demand is high. Think of it as an on-demand power boost.
probably your power is too short, increase your gauge wire, and your ground wire of the amplifier has to be shortly as possible, and the positive has to be enough to support peak power, you can also put a big capacitor on the positive wire to give some more power while the bass peak.