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  #1  
Old 12-10-2011, 11:24 PM
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Default Mounting Amp Upside Down?

I'm planning on doing a false floor in my Forester and was wondering if there would be any issues if I were to flush mount my Onyx 1500.1 upside down to the false floor with some lexan to replace the bottom plate...
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Old 12-10-2011, 11:29 PM
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I wouldn't...the heatsink would be pointless and I wouldn't mount a amp inside a falsefloor unless u have great ventilation...
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Old 12-10-2011, 11:47 PM
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I would install several fans for ventilation under the false floor.

Aren't the mosfets the main components that are cooled by the heatsink? They are cooled by the side of the amp do I don't think it would make too much of a difference. Or are the mosfets not the only thing that needs ample cooling?
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Old 12-11-2011, 12:16 AM
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Picture of the mosfets...
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Old 12-11-2011, 12:37 AM
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I would think they would be ok i have my planet audio amp right side up in the Spain tire well and it gets warm to the touch but never hot with no fans circulation about 1500 rms give or take a few watts soon to be 2 k when my alt comes in you should be fine just put some fans that hit the heat sink never did get why most if not all amps are upside down ?

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Old 12-11-2011, 12:58 AM
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I've seen this discussed several times and the general consensus is that it's ok to do with newer amps. Something about the way newer amp's boards or fets are attached compared to the way they used to be? I'd use some ventilation fans though.

I've only tried it with my old school amp and it was not happy upside down.
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Old 12-11-2011, 01:06 AM
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I tried to search but the search using Tapatalk blows. I guess I'll end up mounting it upside down and seeing how it does and go from there.
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Old 12-11-2011, 02:07 AM
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Quote:
Originally Posted by taylorfade View Post
I've seen this discussed several times and the general consensus is that it's ok to do with newer amps. Something about the way newer amp's boards or fets are attached compared to the way they used to be? I'd use some ventilation fans though.

I've only tried it with my old school amp and it was not happy upside down.
Yep you're right. Most of the newer amps not only run cooler but also have the "FETs" mounted vertically to the side of the heatsink like that 1 in the picture which would dissipate heat mounted either direction. The problem with older amps was the transistors were mounted horizontally to the heatsink & when mounted upside down the heat went back inside the amp instead of away from it. Plus they just run hotter in the first place.

Some newer amps like MA's & Autoteks with the stainless steel cover are designed in such a way that they're pretty much already upside down & I'd think they'd do better if you mounted them opposite or actually upside down.

I'd think you'll be fine but I do agree with others that you should try to use some fans just encase.

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Originally Posted by nicholask1993 View Post
I tried to search but the search using Tapatalk blows. I guess I'll end up mounting it upside down and seeing how it does and go from there.
Tapatalk just sucks lol
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Last edited by ghostmechanic; 12-11-2011 at 02:09 AM.
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