Question about head unit
08-01-2007, 09:26 PM
#6
I tend to get a bit irritable
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Originally Posted by viperxiv
If one of the magnets of the speakers is in contact with the body of the car nothing will work either. That would only be the case maybe if you just installed speakers.
LMAO With all due respect, did you just pull that out of your ass?
08-02-2007, 06:56 AM
#9
You have to check all the wiring connections to the amp:
1) the remote turn-on wire(at both the headunit and at the amp)
2) the 12+ wire coming from the battery (and it's fuse)
3) and the amp ground wire (at both ends)
You can use a multimeter to check all of these.
If all of those check out, then you can swap in another amp to check if the one you have is blown. Also there might be a fuse on the amp itself.
Oh, if the amp is turning on but there is no sound, make sure the rca cables didn't come loose at the headunit or at the amp.
1) the remote turn-on wire(at both the headunit and at the amp)
2) the 12+ wire coming from the battery (and it's fuse)
3) and the amp ground wire (at both ends)
You can use a multimeter to check all of these.
If all of those check out, then you can swap in another amp to check if the one you have is blown. Also there might be a fuse on the amp itself.
Oh, if the amp is turning on but there is no sound, make sure the rca cables didn't come loose at the headunit or at the amp.
08-09-2007, 04:08 PM
#10
Originally Posted by filtor1
I quadruple the remote lead wire theory.
Not sure what a speakers motor being stuck to the car door would do though. :dunno:
Not sure what a speakers motor being stuck to the car door would do though. :dunno:
some older head units used chassis ground as one speaker lead, and the other swung +- from there. weird system, ugly electronics when you try to repair.
they've gone to a differential amplifier system now where each lead swings +- in relation to each other and things are much better off.
but...... ever accidentally touched a speaker lead to the chassis when the amp is powered up? My old Orion HCCA250 welded an 8 awg speaker wire to the floor of the car one time. ouch.
now translate that to a bad speaker with a voice coil that's shorting against the motor assembly somewhere, and you have one nasty mess. been there, done that, fortunately I had a fire extinguisher in the garage when it happened.
08-09-2007, 04:18 PM
#11
Originally Posted by Matt93SE
If the motor somehow gets shorted to the voice coil- and thus speaker lead- you can do some nasty sheit.
some older head units used chassis ground as one speaker lead, and the other swung +- from there. weird system, ugly electronics when you try to repair.
they've gone to a differential amplifier system now where each lead swings +- in relation to each other and things are much better off.
but...... ever accidentally touched a speaker lead to the chassis when the amp is powered up? My old Orion HCCA250 welded an 8 awg speaker wire to the floor of the car one time. ouch.
now translate that to a bad speaker with a voice coil that's shorting against the motor assembly somewhere, and you have one nasty mess. been there, done that, fortunately I had a fire extinguisher in the garage when it happened.
some older head units used chassis ground as one speaker lead, and the other swung +- from there. weird system, ugly electronics when you try to repair.
they've gone to a differential amplifier system now where each lead swings +- in relation to each other and things are much better off.
but...... ever accidentally touched a speaker lead to the chassis when the amp is powered up? My old Orion HCCA250 welded an 8 awg speaker wire to the floor of the car one time. ouch.
now translate that to a bad speaker with a voice coil that's shorting against the motor assembly somewhere, and you have one nasty mess. been there, done that, fortunately I had a fire extinguisher in the garage when it happened.
08-10-2007, 12:04 PM
#12
heh... not my charger. I just like the hideousness of it so I stole the pic from fleabay.
it happened in my old mitsu truck. back in the day when you weren't cool unless you were breaking windows. I had six 10W6s behind the seat (in a regular cab mini truck! good thing I have short legs!) powered off that one amp. paid of 6.5s in each door, each fed by another 250HCCA and the tweets run by a 225HCCA.
Poor 90hp engine only had a 45amp alternator on it... took two batteries and a huge stack of capacitors to keep the engine running when I had it cranked up.
it happened in my old mitsu truck. back in the day when you weren't cool unless you were breaking windows. I had six 10W6s behind the seat (in a regular cab mini truck! good thing I have short legs!) powered off that one amp. paid of 6.5s in each door, each fed by another 250HCCA and the tweets run by a 225HCCA.
Poor 90hp engine only had a 45amp alternator on it... took two batteries and a huge stack of capacitors to keep the engine running when I had it cranked up.
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