Question about MA Audio M689I Car Audio Amplifier

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I have a memphis audio M689i. I was driving and everything was working great. I slow down for a turn and my bass stops. The protect light engages when the bass is about to hit, then goes green again when the bass stops. I turned the gain way down and the bass boost all the way down. The light stays green now but protect kicks back in if the volume is over 32 (50 max). The sub hits with a similar amp so I know the problem is within the amp. I have checked all connections and ground wires.

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6 Suggested Answers

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Posted on Jan 02, 2017

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KaeZoo
  • 156 Answers

SOURCE: protection mode override

If you have your subs wired to the amp in a bridged configuration, try wiring one to each stereo channel instead. Also, make sure your ground wire is secure and connected to a clean, solid metal part of the vehicle body with the paint scraped off. If this doesn't work, disconnect both subs and try connecting only one at a time; one of the subs may have a problem that is shutting down the amplifier.

Posted on Mar 11, 2007

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cheebster
  • 39 Answers

SOURCE: amp heats up and goes into protect mode

Hi Saint108. You're describing it well, and i know what the problem is already. The MA audio amp, can't hold with a 2 ohm load. It's too low for that amp, that's for sure. Those are budget amps and they are not well built enough to handle low ohm setups like that. It's overheating and there's no ways around it.. Other than wiring your subs differently ! Just wire your sub directly (not in parallel) in a 4 ohm load, you will notice it will stop overheating that much. Do it quick, you'll most likely fry your amp giving it such hard work !! The HUM you're hearing could be related to it also. Try that, and keep me posted on the status. Thanks ! Cheebster.

Posted on Jul 02, 2007

  • 1 Answer

SOURCE: jl audio E6450 cutting out

hi, have you figured out whats wrong with ur amp ...i have the same amp ....and as soon as i finished the connections ...and connect the remote on wire,,, the amp goes on ...making a ticking sound with the green light blinking and the red light staying solid on ...whats the problem please help ....how can i fix this ......my amp is a jl e6450 ....im using a panasonic cd player with a built in amp ....and thats the cd player im trying to connect to the jl amp ...please HELP

Posted on Apr 07, 2008

  • 631 Answers

SOURCE: amp trouble

The ohm load may be too low. What make/model amp is it?

Posted on Aug 01, 2008

  • 1 Answer

SOURCE: Subs and amp problem

2 subs and 1 amp

Posted on Nov 19, 2008

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