Question about Jensen PS2180 Car Audio Amplifier

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Same problem I have that same problem only when i turn my HU all the way up i can faintly hear the bass. Does this mean the RCA jacks on the amp or cd player are bad?

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If your head unit has a separate setting for a non-fader then make sure that that is turned up and check the gains on the amp if the gain is all the way down you wont get any output. And if the gains are down only turn it about 3/4 of the way up, never all the way. If you are getting signal from both channels but it is faint, it is most likly not the RCAs or the RCA jacks. I would say it is a gain issue or a bad amp. Let me know how it goes. Good luck.
-Andrew Hawkins

Posted on May 01, 2008

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How to tune properly


make sure your speakers are wired to the amp with correct ohm load, turn gain, bass boost all the way down on amp, zero out your equilizer on the cd player and turn it all the way down then start raising volume on cd player., when u can start hearing music thru the subwoofers adjust the cd player volume till the sound from your subs is at its peak without any distortion. then start raising the gain on your amp till you are happy with the sound. It gives you the optimal signal strength coming from the cd player and the smoothest sound.

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I have only one rca jack coming out of my cd player for subwoofer. but have two rca inputs in the lightning amp? just use one? or do i buy a "y" adapter?


if you only use the white or the red then you won't have the correct sound so i would say buy a new deck but if you must get a "y" adapter but your bass may not sound right.

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1 Answer

My kicker zr240 powers up but its no sound coming out the amp the guts of the amp looks fine


it could be your input section on your amplifier were you rca jacks go in but you should check and make sure it aint your cd player out put on your rca jacks the easy way to check this is with a meter and a cd playing in your cd player turn your meter on volts usually your out put on rca 2.5v some cd players put out 5v so take your postive tester needle and stick it in the inside part of your rca jack and take negative tester needle and touch the outerside of the rca jacks and see if you get any reading if do that good on that part but on your amp no it could be in the input section of your amp it could be as simple as a burnt trace wire on the bottom circuit board or a op amp chip theirs alot in a amplifier but you can test them with a meter to find out witch one bad but i would take it to some one that work on amplifiers if you dont know how to test them

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What amplifier should I use for 2 650W Subs?


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Car Amp is on but not powering my subs


yes..ur assumptions r right..it cud b the rca jack or a bad wire..check the connection as it cud hav gone loose due to car vibrations.also check the fuse of the amp.

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Have a nice day!

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1 Answer

Unwanted bass coming out of my subs


there has to be sumthn hooked up wrong bc i have had same problem with my 12' subs but it was simply a matter of my rca jacks but sense you have checked them try rewiring the speakers if that does not work then your rca module may be burned out within the amp..iso then check the amp by taking the cover off and making sure nuthn is burned on the inside.or if any wires are loose or touching.

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1 Answer

Cant figure out my car audio problems!!!!!


There are a couple of tests you can perform. I'd first recommend checking the shield ground. You'll need an ohm meter. The details can be found on the following page.

RCA shield ground test

You can also test the output with the multimeter. Set the multimeter to AC volts. If it's not an auto-ranging meter, set it to a voltage range of ~2v AC. Disconnect the RCA cables from the head unit. Touch one meter probe to the outer ring of the head unit's RCA jack. Touch the other probe to the metal contact in the center of the RCA jack. With the head unit near full volume and a clean signal source, you should read at least one volt on musical peaks. If you have a bass disc or a test tone disc (~60hz sine wave), use those.

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1 Answer

Alpine


If this occurs with the head unit plugged directly into the amp (no signal processors inline, you probably have open shields on the head unit.

To check the shield ground, disconnect all RCA cables from the head unit and measure the resistance between the RCA shield on the head unit and the case of the head unit. It should read ~0 ohms.

Dec 03, 2007 | Car Amplifiers

1 Answer

My brand new system isnt working right...


All righty then, This is most often gaused by bad grounds. Make certain the ground of the amp is a solid clean connection. The best place is under one of the rear seatbelt bolts, next check the condition of the ground at the battery this has to be clean with a good connection to the chasis, third make sure the Head Unit also ahs a clean positive ground. If these do not yeild results then get hold of any littel portable radio, cassette player, mp3 player as long as it has a earphone jack. Get one of those cables that have a earphone plug on one end and RCA plugs on the other. Disconnect the RCA's from the HU and hook up the player. Power up the system and play back from your portable player, mess with the gain on the amp and see if you still have the same problem when playing back from the portable device. If the problem goes away then you probably have blown grounds on the RCA's on the head unit and only a repair shop can fix that or a new HU. If you still have the problem with the portable player then adjust your lowpass filters and cut off to a higher frequency until the problem goes away. The gain on these amps should never be used to make up for low output from the Head Unit. (another cause for this condition) Get a HU that has 4 to 6 volt sub outputs and crank the gain down on the amp. That gain control is to control distortion (over driving the amp) not to make it louder. If you want louder then go for the HU with the higher sub output voltage or go with a SUB with a lower ohm rating. Your amp is stable down to 1 ohm. Oh and double check if you have your subs wired correctly improper wiring at the subs can m ake this problem worse.

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