My kenwood kdc319 is in my f-150 truck. the speakers are stock when you turn the volume over 16 it shuts off then comes right back on. turn down to 15 and seems to do fine. dont run it that loud just got radio from friend and playing with it. any help please. thanks
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Re: radio shuts off at volume of 16 or more
Maybe a protection component cutting in. If you have speakers that are too powerful for the radio it may shut down to protect the amplifier from overdriving the speakers. That produces too much heat in the amp chips/transistors and they either have a overload cut out protection circuit or they burn out. Even if the speakers are the stock fitted ones the wattage could be bigger than the amp in the radio can handle. There's probably no way of knowing how powerful the speakers in the truck are but you could try the radio with another set. Max 50 Watts for that radio. If you don't have the manual for it, it's available here: http://www.kenwoodusa.com/Support/Car_Entertainment_Owners_Manuals/#_
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You have a grounded out speaker wire or blown speaker. Disconnect speaker wires at the unit. Make sure the wires are not touching, turn the unit on, then turn the volume back up. If it stays on, it is a wire or speaker. Re-connect one speaker at a time and test. once you find the bad wire/speaker, disconnect the wire at the speaker and test again. This will determine if it's the speaker or wire.
If after disconnecting the speaker wires it still cuts out, check your ground and meter the DC voltage at the power wire. If you do not have enough current at the radio, it will shut off as well. Usually this will happen at about 9.8v dc.
If you still need further help, post a reply/comment and I can help you dig further.
Sounds like the music amplifier is different to the tuner audio amp. The music amplifier is now looking at an unbalanced impedance which is less than it should be. Therefore the output chip of the music amp has more current through it than it wants so it gets hot and shuts down.Put a four ohm wirewound resistor ( from Radio Shack ) in series with each surround speaker to reduce the current flow through the amplifier output.
If it is an older vehicle you could have interference from the ignition system. You can wire the radio to be powered up from a toggle switch that get its power straight from the battery, with a fuse between the battery and switch of course. This will eliminate powering up the radio with the ignition switch and take the ignition system out of it. Also need to make sure the ground wire is grounded good and the ground wire is the same wire guage if not larger than the power wire.
receiver is detecting a problem in the speaker wiring and is going into
protection mode. If the receiver shuts off due to volume level, this
can be caused by a poor connection, damaged speaker, insufficient gauge
wire, or connecting multiple speakers to one speaker output. The
connections at the receiver and speaker should be clean with the ends
of the wire twisted tightly, preventing any strands from missing the
terminal. Connecting two sets of wires together to add distance should
be done with terminals and insulated to prevent the wires from touching
each other. If using thin wire, replace completely with heavier gauge
wire; do not add to the existing length. Be careful not to push the
speaker wires in too far, this will cause the speaker terminals to grip
the insulation and not the conductor. The speakers being used must have
an impedance within the range listed next to the receiver’s speaker
outputs, normally between 6? - 16?. The impedance of your speaker
should be listed behind the speaker itself.
If problems continue, disconnect the speaker wires from behind the
receiver and power the receiver on. The receiver will shut off quickly
if there is an internal short and would need to be serviced if this
happens. If it stays on, try connecting the speakers one at a time.
Replace any speaker that causes the receiver to shut off.
either bad ohm load or over heat if the ohs on the speaker wires to the amp are lower than specified use in the manual it will act funny cause it is pusing harder than its meant to and if it gets too hot either bad location or bad amp you can try turning the gain down a little until the amp stays on constantly at high volume
check your ground wire ..
then check battery has enough charge..
usually fault is in where your stereo is connected to your ground source.. good luck ,if no luck try your checking your speaker wires for a short..