Question about Infinity 475A Car Audio Amplifier

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Factory Amp I just bought a 1998 Jeep cherokee limited, i decided to install a Sony Xplod in it came to find out it has a factory Amp. installed radio, no sound, has power. is there a way to bypass the amp so i can enjoy my music????

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I assume you used the correct Metra plug (70-1878) to install the radio. Ensure the blue and white wire on the Metra is attached to the blue and white wire (or solid blue) on the Sony. This will provide + turn on voltage to the factory amp.
The other good possibility is that the Metra harness has a black and a black and white set of wires both must be ground.
Lastly the Metra harness does not provide these( -) grounds, they are supplied by the braided strap . or the single wire that was attached to the back of the Jeep radio.

Posted on Jul 22, 2008

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Posted on Jan 02, 2017

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Have a '97 dodge ram truck with factory radio, how to install sony xplod amp?


You need a line level converter to connect to the speaker wires coming out of your Dodge stock radio. Like products from PAC, or Audio Control or specifically a Cache ClocD.

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You have to cut the factory speaker wires on both sides of the amp and solder them together.(bypass the amp) Pull out the factory radio so you can identify the color of the speaker wires or look at the wire colors on the back of the factory speakers.

Dec 09, 2013 | Car Audio & Video

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My amp has power but then immediately goes red into protect mode.


Ok, being an old-school "back yard" installer when i began, gave me 2 immediate possible diagnosis for your problem. I was running a Kicker zx550.3 amp to 2 Polk DB 12'inch Subs rated 600w max 1500w. I also used a LOC converter (Line Output Converter) in order to use my stock Bose stereo since it did not have RCA outputs. Now shortly after running this setup (approx 2 weeks) I noticed a substantial drop in sound output and also noticed some ground noise/distortion coming thru the subs. After tracing my wires that connected my LOC to the Amp, and Rear Speaker Wires of my Radio to the LOC, I noticed that by jostling the wires there was a connection issue. If you are using your factory radio to power your regular component speakers (tweeters, coax, mids) then chances are your stereo feeds into a FACTORY INSTALLED amplifier. If thats the case, then you need to access a Wiring Diagram for the Harness coming off the Factory Amplifier! Once this is viewable, check the wiring and locate the "Amplifier to Radio Signal Wires" and also the "Amplifier to Speakers Signal Wires" ... Now go back to your LOC and look at the wires you tapped to get the Line Signals to the converter, and make sure that you havent tapped your lines off of the AMPLIFIER TO SPEAKER wires. These wires carry a small electrical current because they are coming powered from the Amplifier, and most Line Output Converters are PASSIVE, which could short the signal the LOC creates thus reducing your signal gain, but does have the capability to surge back to the Factory Amplifier, which could possibly melt the shielding of the factory wiring, and thus allow your signal to cross or ground out! If you can, try running another RCA input to your Sub-Amplifier from another source other than your car, and see if your protection lights go out and the amp returns to normal operation. If so then your LOC or Factory amp is to blame. If not, then the second diagnosis is much simpler, which is your Alternator current has been reduced due to many different possibilities, and you should acquire a .5 or 1 Farad Stiffening Capacitor which will reduce the excess draw from your charging system. But due to the first solution being my problem exactly, im willing to bet your's lies along the same variables... GL to you!

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it means there not enough power going to the amp.or the power wire inside the amp has melted resalting in a bad conection

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1 Answer

I have a 04 silverado with factory bose stereo. I have installed a Xplod xm-zr604 and the sub is playing but it will not crank up. Its as if the volume is very low.I have tie in after the factory amp for...


If you dont have a line level converter with adjustable output - get one.

Your amplifier only amplifies the signal it gets - and if its a very low voltage - you wont get as much output from the ampifier.

I always recomend PAC converters. They are a little more expensive - but are #1 adjustable, and #2 they also make one with voltage sensing. You wire up a positive power source, and when it detects voltage from the speaker wires - it will send a remote turn on to your amplifier. (MTX has this technology built in to its amplifiers)

No more crawling under the dash or removing the factory radio!!!

Thanks for using FixYa - a very Helpful rating is appreciated for answering your FREE question.

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1 Answer

Amplifier


Yes. Most likely your factory speakers are blown as I've seen this many times. They are co-axials (2 ways) and the woofer part of the speaker is blown or the surround is rotted and only the tweeters are playing. I also believe that the front door speakers are low frequenct. Are they playing or buzzing?? Let me know and I can confirm this as the solution. You need new speakers.

Larry T
Winona Lake, IN
http://www.cybersoundsaudio.com/cybersounds/vehiclepics.html

Jul 01, 2008 | Car Audio & Video

2 Answers

Wireing


I believe that this model Sony amp includes High Level inputs. Those allow you to connect the normal speaker wires coming out of the factory stereo to the amp. If for some reason it doesn't include the inputs you can buy a high level to low lever converter that will give you rca from the factory unit.

May 06, 2007 | Sony Xplod XM-1652Z Car Audio Amplifier

2 Answers

Sony Xplod 1000 watt car amp quit working.


Almost all after market amps use 12v at very very low amperage to trigger the amp on. A temporary jumper from the battery plus terminal on the amp AFTER the battery and ground wires are attached should cause the amp to turn on. I would check to see if you have attached your speaker load correctly ESPECIALLY if you are bridging. Most of the blown amps that come into my shop are due to incorrect bridging loads from the speakers. Note that a 4ohm load bridged across both outputs of an amp will deliver a 2ohm load to each of the channels. When you parallel wire two 4ohm speakers together and then attached them to a bridged amp you will be putting a 1 (one) ohm load to each channel of the amp. Please don't make this mistake. It will fry your amp in about a month. Hope this helps. Good luck.

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