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<blockquote data-quote="digitalrust" data-source="post: 8555267" data-attributes="member: 672564">Nothing about my system has changed in years yet my amp goes into protect mode more and more often. I am trying to figure out the cause. Deteriorating.. battery? speaker? amp?The deterioration has been very slow and gradual (i.e. imperceivable day-to-day), but a few weeks ago I listened to some albums I hadn&#039;t heard in a while and realized so much of the low end is missing. The amp can hardly handle deep lows anymore.I checked the voltage at the amp, very low. Found corrosion on the positive terminal, cleaned it up. Lightly sanded contact points. Amp output did increase drastically.. but it didn&#039;t last. It&#039;s still an improvement, but I don&#039;t understand how its performance can drop overnight.I want you to tell me that the cause is my 3-year-old battery. However, I was under the impression that power depends more on the alternator than the battery itself.So then my next guess would be lowering impedance on an aging sub (unfortunately I don&#039;t have a reference measurement) which would be too taxing on the amp (I bridged 2 channels). I&#039;m hoping this is not the case.</blockquote>

[QUOTE="digitalrust, post: 8555267, member: 672564"] [B]Nothing about my system has changed in years yet my amp goes into protect mode more and more often. I am trying to figure out the cause. Deteriorating.. battery? speaker? amp?[/B] The deterioration has been very slow and gradual (i.e. imperceivable day-to-day), but a few weeks ago I listened to some albums I hadn't heard in a while and realized so much of the low end is missing. The amp can hardly handle deep lows anymore. I checked the voltage at the amp, very low. Found corrosion on the positive terminal, cleaned it up. Lightly sanded contact points. Amp output did increase drastically.. but it didn't last. It's still an improvement, but I don't understand how its performance can drop overnight. I want you to tell me that the cause is my 3-year-old battery. However, I was under the impression that power depends more on the alternator than the battery itself. So then my next guess would be lowering impedance on an aging sub (unfortunately I don't have a reference measurement) which would be too taxing on the amp (I bridged 2 channels). I'm hoping this is not the case. [/QUOTE]

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