I hooked up a mates car audio system he has an kenwood KDC-3027A splx 1000w 4 channel anp a set of pioneer 6X9's and a sub which is blowen he got the gear from a crashed car and by the looks of it who ever had this gear set up was a fool he had the gain on both channels set to the max and it took me half an hour to untangel the mess , I done all the usaul hooking up all is fine the amp starts and music is fine then it goes to protected mode he just rang me telling me he is getting no sounds from the 6x9's he was not running it all that hard what reasons are there for an amp to go into protected mode
Thanks
Replies (6)
cflanagan on 10/3/2004 14:48:44
the car is a 00 punto
uochronos on 10/3/2004 16:53:16
i have salvaged a few amps from wrecks and in general especialy if its a bad wrek at least one componenty is bad.. if this amp wasnt bolted down in the car that it was in then chances are it went flying and got the hell beat out of it.
i would not be surprised at all if some compnent inside is bad. but here is a list of possible reasons for protect mode
wrong ohmage wired to one of the channels.
getting too hot where ever it is mounted. not enough air circulation
short in one of the wires well lead it to go into protect mode.
these are the most common reasons for an amp to go into protect that i have had to deal with. hope this helps
Chronos
ttocs on 10/3/2004 21:58:47
disconnect the speakers and turn it off and on, see what happens. If it still goes into protection then disconnect the rca's. If the amp is still in protection with nothing hooked up, the amp is bad.. If it starts working at any time then we need to look at what was disconnected.
cflanagan on 10/10/2004 11:12:28
cflanagan on 10/10/2004 11:18:47
well found out why it kept going into protect mode well not really a fuse blew and i replaced it now it works fine appart from the interference that comes across when he has the engine going as buzzing sound the increses with the revs
swez on 10/10/2004 11:57:40
That's a ground loop problem. His HU has to be grounded to the firewall or floor pan. (not the wiring harness ground wire) So does the amp. These grounds need to be to bare metal in both cases. That should eliminate the engine noise.
See our DIY articles on ground loops and proper grounding techniques for full details. The second link explains how to set gains and such for best performance.
http://www.clubknowledge.com/Car_Audio_FAQ/?t4
http://www.clubknowledge.com/Car_Audio_FAQ/?t3
Swez
Thanks
Replies (6)
cflanagan on 10/3/2004 14:48:44
the car is a 00 punto
uochronos on 10/3/2004 16:53:16
i have salvaged a few amps from wrecks and in general especialy if its a bad wrek at least one componenty is bad.. if this amp wasnt bolted down in the car that it was in then chances are it went flying and got the hell beat out of it.
i would not be surprised at all if some compnent inside is bad. but here is a list of possible reasons for protect mode
wrong ohmage wired to one of the channels.
getting too hot where ever it is mounted. not enough air circulation
short in one of the wires well lead it to go into protect mode.
these are the most common reasons for an amp to go into protect that i have had to deal with. hope this helps
Chronos
ttocs on 10/3/2004 21:58:47
disconnect the speakers and turn it off and on, see what happens. If it still goes into protection then disconnect the rca's. If the amp is still in protection with nothing hooked up, the amp is bad.. If it starts working at any time then we need to look at what was disconnected.
cflanagan on 10/10/2004 11:12:28
cflanagan on 10/10/2004 11:18:47
well found out why it kept going into protect mode well not really a fuse blew and i replaced it now it works fine appart from the interference that comes across when he has the engine going as buzzing sound the increses with the revs
swez on 10/10/2004 11:57:40
That's a ground loop problem. His HU has to be grounded to the firewall or floor pan. (not the wiring harness ground wire) So does the amp. These grounds need to be to bare metal in both cases. That should eliminate the engine noise.
See our DIY articles on ground loops and proper grounding techniques for full details. The second link explains how to set gains and such for best performance.
http://www.clubknowledge.com/Car_Audio_FAQ/?t4
http://www.clubknowledge.com/Car_Audio_FAQ/?t3
Swez
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