Question about Jensen JXP680 Car Audio Amplifier

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Protect light I have a jensen JXP680 amp, and I just recently purchased new subs, and my amplifier ran my old subs just fine but it keep switching into protect with my new subs how do I adjust it so it puts out enough power?

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Re: protect light

Set your Filter Switch to LPF.  Turn the Bass Gain/ level all the way down temporarily. Set your Crossover to below 100HZ.  Then Turn on the system with a Bass test sound.  Turn up your bass Gain/level until you get distortion.  Then turn it back till you just get the distortion out. Then do not warn everyone that you will De-nad them if they touch your settings.

Posted on Oct 25, 2007

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Protect Light On Amp Being Weird

Could try switching right and left subs. If the problem moves to the other side pull the wiring and redo.
Then if the wiring is ok check the sub.

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There's a flashing green and red light when my car is on and the sub attached to the amp is making a heartbeat like noise when the light goes green and then the light goes red right away. everything is...

Check the wires for short circuiting at the car body or speaker wires. Triple check really everything.
Make sure the connectors are 100% connected to the wires. There maybe some resitance if the amp isn't getting enough power from the battery.

Aug 19, 2011 | Jensen JXP680 Car Audio Amplifier

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My protect light is flashing from red to the green power light it makes a thud noise in the sub when it flashes i have checked my ground and power it all seems to be fine does any1 have a idea on what...

You either have a short in your wiring (between the amp and the sub) or have wired the sub(s) at too low of a resistance. If for example you have wired it to 2 ohms, when the amp can only support a 4ohm minimum, the protect light would come on once you tried to turn up the volume a bit. This may happen if you have lost the wiring off one of your subs or one of the voice coils, thereby affecting the total resistance.

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Amp was working, then it goes out

it could have a short inside of the amp. my old amp did that and i moved my grounding wire and it shot sparks all throughout my trunk..... try to return it. or exchange it. tell them its defected

Aug 01, 2009 | Jensen LXA300 Car Audio Amplifier

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Its stuck on protected. I recieved the amp for my birthday in 2000. It protected it self 90 days later. I needed an amp righr then so I went and bought a 600 watt jensen. I took the old one out of the...

whats the ohm rating of amp probally 4 what is the ohm rating for sub how many subs are you running how do you have them hooked up parallel or series is your wiring to amp right

Jul 06, 2009 | Car Amplifiers

1 Answer

Protect light keeps coming on when i give my jensen amp power

Eith some wires touched, you dont have big enough fues or you have somehting hooked up wrong

May 28, 2009 | Jensen LXA300 Car Audio Amplifier

1 Answer

Problem with amp...

In virtually all instances where the protection light is illuminated, the amplifier has gone into protection because the output transistors are shorted. To eliminate external wiring problems do the following.

Disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If it still goes into protect, the amp likely has blown output transistors.

If it does have blown outputs, it's is likely due to the speaker wires shorting together when the woofer was out of the vehicle.

Dec 29, 2007 | Jensen XA4150 Car Audio Amplifier

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Both green and red ligt or on my jensen ka3 i dont know what it means i had it working b4 i swaped my subs for some new ones and the amp dosent work now.i dont know if is because of the red light but i...

Generally, the power light is green and the protect light is red. If the protect light is on there could be a short in the wiring or there could be an internal fault in the amp.

Disconnect all speaker wires from the speaker terminals of the amp and disconnect signal cables from the amp. If it powers up, the wiring needs to be checked. If it still shuts down (goes into protection), the amp likely has blown output transistors.

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2 Answers

Amp heats up and goes into protect mode

Hi Saint108. You're describing it well, and i know what the problem is already. The MA audio amp, can't hold with a 2 ohm load. It's too low for that amp, that's for sure. Those are budget amps and they are not well built enough to handle low ohm setups like that. It's overheating and there's no ways around it.. Other than wiring your subs differently ! Just wire your sub directly (not in parallel) in a 4 ohm load, you will notice it will stop overheating that much. Do it quick, you'll most likely fry your amp giving it such hard work !! The HUM you're hearing could be related to it also. Try that, and keep me posted on the status. Thanks ! Cheebster.

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