Question about Jensen JPA1150M Car Audio Amplifier

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Amp wont go off standby

Hello my friend has a Jensen JPA1150M Car amp and when he turns on his car the amp stays on standby. i cant figure out why this is considering when i hooked up his subs in my own car they worked just fine using my own amp. so i know its a problem dealing with the amp but i cant figure out what it is. any suggestions?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Vulfen
  • 5 Answers

SOURCE: Jensen LXA400

I have this same amplifier. I have noticed several ways it will "not work" during my ownership of it. I have it connected to a seperate battery to save my alternator, battery, etc as it is a power hungry beast for how low the output wattage is. Test the input voltage to see if you have enough, one way to see this is to check the "jensen" emblem that lights up. If you dont have enough power it will appear dim and only the right side lights up. Also the amplifier will not work if your speakers are "blown" even a little bit. Ive taken speakers that wont work on my lxa400 and connected them to a higher power amp and they will work (although they will sound horrible) If youre smart you will keep the gain under 3/4 on this amp, I see some people have found out the hard way that full gain fries the amplifier circuitry. Not an expert on electronics but it smells somewhat like melting glue or plastic. Ive noticed a lot of people have problems with the RCA jacks as well. There are 8 jacks, in two clusters. The first one is A+B and the second is C+D. Note: You do not NEED Y connectors on this amp! Connect your output rcas from the deck to top left and bottom left jacks of the left cluster. This will give you left and right (a+b) output from the first set of speaker outs. Then connect an rca patch cord from the top right and bottom right jacks of the first cluster and connect the other end to the top left and bottom left of the second cluster. This will give you output from the second set of speaker outs. Remember that this is in 4 channel mode. I dont remember the set ups for 3 channel but two channel I believe is the left deck rca goes to top left of the first cluster and the right deck rca goes to the top left of the second cluster. Then you just wire the speaker outs according to the picture on the amplifier. something like this: _________________________ |(+) - (-) +| ~~~~~~~~~~~~~~~~~~~~~~~~~ Speaker + goes to (+) and speaker - goes to (-) Also addressing another issue if you want to increase the wattage to your speakers you just use a lower resistance speaker (2ohm instead of 4) I would not recommend using anything over 4 ohms. As for the high level inputs, I dont recommend using them unless you have the plugs that go with them, its a lot easier to wire your deck rears to a line converter (changes straight speaker wire to RCA jacks) or to just buy a new deck with RCA outs. Last item, common knowledge: 400 watts does NOT mean 400 watts!!! This amplifier puts out very little actual wattage (50 or 83 per channel depending on the load) Hope all this helps someone out there.. Anyone who knows the 3 channel setups I would appreciate it.

Posted on Jul 15, 2007

  • 631 Answers

SOURCE: Bridging My AMP

This amplifier uses the left + and the right - for bridging. The manual is available from Jensen but you have to email them to get it.

5d751e9.jpg

Posted on Oct 12, 2007

jerryg50
  • 1667 Answers

SOURCE: Jensen Amp and Sub

If you followed the instructions correctly, then the amp must be defective. This is sort of simple.

My generic suggestions:
You have the power, the ground, the outputs to the speakers, and then the input.

Make sure that none of the speaker wires are somehow being grounded. Make sure that nothing is shorted that feeds the speakers.


Jerry G.


Posted on May 01, 2008

zapco
  • 30 Answers

SOURCE: Hooking Up A Sony XM754HX To Jensen BP210

hi .let me see if i can help u out ...need more info on the speaker..are the 8ohm or 4ohm ? and are the single are DVC?.....from what i can see u can bridged the amp..and u must connet the subs in series or just connet each sub +/- to +/-..and that will give u a stereo mode... u will still get great sound

Posted on Jun 22, 2008

  • 4 Answers

SOURCE: Jensen VM9311TS wont play cd

but if the amp isnt powered on, how does it play during the radio? I have the same issue

Posted on Oct 13, 2009

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I'm assuming that the amp was installed and was working properly.

It sounds like the output is shorted. The CH450 may be operated as a 2-channel amp or both channels can be bridged for mono powering subs at an impedance of 4ohms or more.

I'd test the sub voice coils and then test each channel of the amp separately.

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Hello gmb_66,

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Most amps that have both high-level and RCA inputs allow you to use one or the other, but not both at the same time. If your head unit has RCA ourputs, those would be the ones to use, because they generally provide a cleaner signal to the amp with less noise.

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If you followed the instructions correctly, then the amp must be defective. This is sort of simple.

My generic suggestions:
You have the power, the ground, the outputs to the speakers, and then the input.

Make sure that none of the speaker wires are somehow being grounded. Make sure that nothing is shorted that feeds the speakers.


Jerry G.


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Bridging My AMP


This amplifier uses the left + and the right - for bridging. The manual is available from Jensen but you have to email them to get it.

5d751e9.jpg

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