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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Navigation, iDrive, Audio, Video, Bluetooth, Phone, Cameras, Electronics > logic 7 amp specs? stout enough to drive 4 ohm jehnerts?
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      01-10-2015, 09:27 PM   #1
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logic 7 amp specs? stout enough to drive 4 ohm jehnerts?

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I am trying to find more specs on the f30/f80 l9gic 7 amp as I'd like to try use it to run jehnert underseat woofers as on my e92 the individual audio amp ran jehnerts nicely even though the OEM woofers are 7 ohm and jehnert 4 ohm, it had no issue. This compared to the earthquake 4 ohm woofers my amp didn't kike. I suspect the jehnert is realistically a bit higher dynamic ohm than 4.

However is logic 7 stable to push jehnerts? How many watts is it sending to the woofers?
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      01-11-2015, 03:18 AM   #2
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HK in the F30/80 uses 7ohms OEM woofers as in the EPS.

You need to understand that using less than 7ohms in aftermarket woofers with the HK and the EPS OEM amp increases the possibility of damaging the OEM amp.
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      01-11-2015, 12:43 PM   #3
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Yes understood. Appreciate it. Plan is to use a new amp with your harness but waiting on it back ordered so just trying things out
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      01-11-2015, 01:02 PM   #4
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Quote:
Originally Posted by 8600RPM View Post
Yes understood. Appreciate it. Plan is to use a new amp with your harness but waiting on it back ordered so just trying things out
I have to be emphatic with this warning as other forum members may try to replace the HK OEM woofers with aftermarket and then could end up with a burned OEM amp: http://www.m3post.com/forums/showpos...3&postcount=43
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