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Amp cutting out?

Old 08-30-2013, 08:33 PM
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Amp cutting out?

Hey guys.

I just moved my Alpine System from my 02 Saturn Vue to my 02 Mercedes E320.

Everything is exactly the same as before :

CDE-102 deck
MRP-M1000 Amp
1 10in Type X sub (running at 2ohms dual coil)

Gains have been played with from time to time, currently set at 25% for gain, bass boost and LP filter.

I am guessing problem is the amp and sub are in the trunk now, compared to the open back of my SUV and i believe the amp is going into a heat failsafe mode since its getting hotter with less air flow?
This is my best guess. I Tested the power, the ground, the Ohms, everything seems to be set up right.

I put a computer heatsink on top of the amp and fastened it down with some like floral wiring? ( this wire shouldnt be an issue right?)

Anyway it seems to keep it cool for a short while, but its still getting hot as hell within 15minutes.

After about 20 the amp cuts out , 5min later comes back on and continues to cut on and off every 5ish. The smell isnt too electrical but there is a stronger than normal sub or amp smell coming from off it.

Aside from installing a normal fan, any suggestions?

Additionally This set up had only cut out about 3x in 2 years in the saturn, after an hour + of bumping hard, or being drunk and turning the volume way too high. This amp has always run hot, but not this hot.

heres a picture of that heatsink
Attached Thumbnails Amp cutting out?-oipb.jpg  

Last edited by StoshFerhobin; 08-30-2013 at 08:39 PM.
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Old 08-30-2013, 08:35 PM
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Also is the ant remote turn on for the amp a constant 12v? i can split that and power a CPU fan ontop of the heatsink then too, may help
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Old 08-31-2013, 11:16 AM
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My guess is the amp is getting lower voltage then before as well? Perhaps your ground isn't perfect or your battery isn't as in good shape. The sub is dual 2 ohm or dual 4?
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Old 08-31-2013, 11:42 AM
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The sub is dual coil 2 ohms.

And the ground is fine and the power is right where it needs to be.

The only thing i havent tested is the power to the amp while the system is turned up loud and bumping, potentially possible its getting under powered inbetween hits?

The mercedes has a ton of electrical features in it, so even if its a nicer battery it could just not be cutting it w the added sub. lights dim a pretty decent amount.

but im not sure how to find out 4 sure

Last edited by StoshFerhobin; 08-31-2013 at 11:47 AM.
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Old 09-01-2013, 02:02 PM
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What is your impedance at the sub wiring at the amp? stating the impedance is a dual 2 ohm driver hasn't said too much, your first post said running 2 ohms dual coil ??? so what is the final impedance here?

Last edited by IT Hz; 09-01-2013 at 02:06 PM.
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Old 09-02-2013, 03:32 PM
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check ground wire... and all the power connects.. And it might be time for service.... i had a amp that did that. it was one of the resistors and one of the heat sink ones on the inside... open it up and look to see if any of them are burnt. before u do some real damage
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Old 09-03-2013, 12:10 PM
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the final impedance is just 2 across the board, its all set up right.

anyway i slapped a CPU fan ontop of that heatsink and now its keeping it cooler for alot longer, no cut outs recently.

If it does start to cut out again, ill send it in to alpine for repairs.
Thanks
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Old 09-03-2013, 01:52 PM
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Originally Posted by StoshFerhobin View Post
the final impedance is just 2 across the board, its all set up right.

anyway i slapped a CPU fan ontop of that heatsink and now its keeping it cooler for alot longer, no cut outs recently.

If it does start to cut out again, ill send it in to alpine for repairs.
Thanks
Don't put the fan on top of the heat sink, put it on the end and have the air blow through the top of the heat sink.
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Old 09-06-2013, 03:23 PM
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Ground and all is hooked up right.
The fan came with the heatsink and is designed to sit ontop of it. thats all hooked up right.
Now
The amp hasnt cut out at all yet after a few hard bumping session, it still runs hot but not extreme. i think this jimmy rig will work for a good while. Idk how to open the amp up.
thanks guy.
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Old 09-07-2013, 08:38 PM
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Yeah use the heat sink just like you would a CPU heatsink, For those who aren't water cooled yet
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