Question about Infinity 475A Car Audio Amplifier

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Protect Mode Whenever it's cold my amp stays in protect mode for a while until my car heats up. It's an 06 taurus. This didn't happen until the weather got cold. It hasn't left protect mode for a few days. I know amps perform better in the cold which is why I'm confused. Maybe it's possible that the car is drawing too much power to heat the car, not leaving enough for the amp. It's not a huge amp though so I don't see why this would happen. I asked a Best Buy installer and he said he hadn't seen the problem in 10 years of installation. Any ideas?

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Hello,

first I would advise you to tighten all of your ground and power connections. Then I would suggest that you expose the circuit board and start the amplifier warm up process, once the amp comes on I would use freeze spray to cool down various components in an attempt to find the component which has become thermally sensitive. Once you find the component I would suggest replacing it and the putting the cover back on the unit.

I hope this helps,

Thank you,

Shuttle83

http://www.electron-age-technologies-llc.com

Posted on Dec 09, 2008

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  • Only a select few things can cause protect mode with the battery only connected.
  • An installation issue. Check the Power, Ground and Remote wires. Make sure non are shorting from one terminal to the other.
  • It is still overheated and has not had time to cool down from being in thermal protect mode.
  • The amp itself is touching metal. You always want something non conductive between the amp and where it is mounted, this includes the screws being used to anchor the amp. They should never touch the metal in the car either.
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Light


The red light indicates that your amplifier is in protect mode. Amps go into this mode if there is something wrong with the setup of the system to prevent fatal damage to the amplifier circuitry. This is bad thing since the amplifier will not function until the problem is solve and it can remove itself from protection mode.

Amplifiers can go into protect mode for many reasons but one of the most common is incorrect mounting. Is your amp sitting on the metal of your vehicle? Is it bolted down and screwed into the metal of the vehicle or your seat? The amp should never be touching any sort of metal. Only the ground should touching the metal of your vehicle.

Speaking of grounds, many people often neglect proper grounding which can cause an amp to go into protect mode. Do you have a solid ground? Is the wire less than 3 feet long and directly connected to a non-painted metal part of your vehicle? Is the ground wire the same gauge as your power wire?

These are just a few reasons why an amp can go into protect mode. You can find more information here. Or simply google for why your amp is in protect mode.

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