Question about Boss C550 Car Audio Amplifier

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No power no sound

Im gettin power to the amp but the light is off. signal is good ground is good but still nothin???

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This may be because there is no signal going to the RMT terminal on the amplifier. try connecting a +12v line, this line tells the amp to turn on. it is normaly connected to the header unit of the car so that it will turn on the amp when the unit is powered on.

Posted on Dec 28, 2008

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I just installed a sony xplod 700 watt 4 channel amp and i was driving and my sound just went out, I could see that the deck was still playing and eq was still jumping but no sound, I checked the amp and...


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make sure the power wire and the remote wire have voltage. at least 12 volts. make sure the ground wire is good and has a good solid ground. after that make sure the rca cables are getting signal from the radio. if you have a small speaker or tweeter you can touch the wires from the speaker to the rca cables and it should play music very quietly. meter the subs and make sure theyre ok and not shorted or bad. if all that checks out good.... the amp is probably bad. start with all the simple stuff and work youre way up. if the amp has good power and signal and good speakers then the only thing thats left is the amp. good luck

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What brand of reciever are you using. Most pioneers have a floating signal ground and the shield of the input at the amp needs to be connected to chassi ground. Also if you had a previous amp failure and the power ground in your old amp opened the current to power the amp will flow through the signal ground of the reciever and burn the copper trace on the circuit board in the reciever. test this by connecting signal cable shield to car reciever chassi.

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I install wire from the battery to the amp ground the amp then i installed the audio jack from the reciver to amp an then the speaker wire an nothin


Power amps must be connected + battery wire to the amp +b terminal with a gauge 8 or bigger depending on the power rating, - ground to the car chassis as short as possible,connect cords from head unit to power amp with good groundings, and remember to connect the speakers and the remote trigger from head unit to turn the amp on.

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You have what is known as a ground loop! you can purchase a ground loop isolator or re-route your RCA jacks away from any power leads, I would try re-route first but if problem persists purchase a ground loop isolator or new wiring at wholesale prices at
www.godspeedaudioheaven.com

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You need to confirm that you have a good signal feeding the amp. If you have another amp in the vehicle, swap the RCA cables between the amps to see if it makes a difference.

You also need to confirm that the speaker are working properly and that there are no broken connections in the wires. If you disconnect the speaker wires from the amp and touch the wires across a D-cell battery (for a fraction of a second), the speaker should pop. if it doesn't, check the wiring to determine why.

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