Alpine PMX-f640 Amplifier
Alpiine34
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sawsix Posted messages 4824 Registration date Status Member Last intervention -
sawsix Posted messages 4824 Registration date Status Member Last intervention -
Hello everyone, I’m reaching out to post a message because I have a small problem with my car's head unit-amplifier-subwoofer setup, so let me explain the issue.
I have a Pioneer DEH-2500UI head unit
an Alpine PMX-F640 amplifier (640w max)
an Alpine Type S12 subwoofer (320w max)
Power: OK (Amp is turned on)
Ground: OK
Remote: OK
RCA: OK
Power: Amp==>Sub OK
I just bought the amplifier above; I previously had another amp, and the setup worked perfectly. However, when installing my new amp (PMX-F640), the subwoofer does not respond; nevertheless, there’s a very slight humming coming from the subwoofer. Even with the gain set to maximum, nothing happens. I went on YouTube to find videos about my amp, and some people have installed it, and everything works perfectly, so I'm quite confused. I hope I was clear enough, and while waiting for your responses, I wish you all a great day.
I have a Pioneer DEH-2500UI head unit
an Alpine PMX-F640 amplifier (640w max)
an Alpine Type S12 subwoofer (320w max)
Power: OK (Amp is turned on)
Ground: OK
Remote: OK
RCA: OK
Power: Amp==>Sub OK
I just bought the amplifier above; I previously had another amp, and the setup worked perfectly. However, when installing my new amp (PMX-F640), the subwoofer does not respond; nevertheless, there’s a very slight humming coming from the subwoofer. Even with the gain set to maximum, nothing happens. I went on YouTube to find videos about my amp, and some people have installed it, and everything works perfectly, so I'm quite confused. I hope I was clear enough, and while waiting for your responses, I wish you all a great day.
8 answers
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Have you properly connected your RCA cables to the "in" inputs on the amplifier and the "out" output on the car radio?
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Hi,
Is the amplifier used or new?
Have you tested the subwoofer on the car radio to see if it works? -
The amp was bought new 2 days ago and the sub is working; I tested it with a tester and connected it to the system :)
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Is the amp connected to the power wiring of the old amp?
Have you checked if the fuse in the fuse holder is not blown? "It needs a 60A one." -
The amp turns on, so I assume the fuse hasn’t blown. The fuse check was done before and after installation, and it is fine.
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I found the solution, I bought the amp at Feu Vert, I didn't pay attention
the amp is a 4x50w so that's why my sub isn't moving at all!
even in bridged mode, I would have 100w in the sub, MEDIOCRE!!! they will take it back
not at Feu Vert, I just have to throw it away :/ -
The Alpine PMX-F640 delivers:
4x75Watts or 1x300Watts RMS at 2 ohms
4x45Watts or 1x180Watts RMS at 4 ohms
The amp is more powerful than the subwoofer, it should get it moving!
Test the amp with one or two speakers; if nothing still happens, it's defective, and Feu-vert is required to take it back!!! -
On a a speaker glued to the ear, you can hear a slight thumping but not what should normally come out, well I think a 4x50 doesn't send enough to move the car, that's weak, right?
