Question about Jl Audio 250/1 Car Audio Amplifier

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Low ohm Light come on on my 250/1 and amp get hot fast.What should i look up to fix? thank you.

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6ya6ya
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Posted on Jan 02, 2017

Nextelneo
  • 133 Answers

SOURCE: low ohms light ! ! ! !

How are the speaker wired and what is the ihms for the speakers?

Posted on Dec 06, 2007

  • 631 Answers

SOURCE: Low ohm light on with no speakers connect??

This can happen if the amp has an internal fault such as a shorted output transistor.

Posted on Dec 26, 2007

  • 6 Answers

SOURCE: low ohm light wont go off

pbabin is correct, that would cause resistance to be at or near 0 ohms and the amp would pull a lot of current (if it did not go into protection mode).

Posted on Feb 12, 2008

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I have a sony xplod 2/1 channel amp 800 watts. I already have 2 sony 6 by 9's hooked up to it running at 60 rms each but I wanna bridge a sub to it too. I was planning on taking a positive from one...


I don't recommend it. It may work good during low volume, but from experience, you will only turn it up so high before it trips the protect light on the amp since it's drawing too much current due to extra speaker(sub), then you have to turn off the radio and turn it back on to get it working again, it gets annoying. I recommend saving up for a mono amp, it will keep your system sounding clean and clear. the setup you specified will work, but it's not recommended. Your amp may run hot as well.

Jul 22, 2011 | Sony Car Audio & Video

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Sleuthing a 300/4 low-ohm issue. 300/4 amp history: unknown. just connected today whole system yesterday/today: head unit, 300/4(to 4 polk 6.5" component speakers brand new) 1000/1 (4-W3's),...


Are you sure you getting enough power to push everything. I have seen when the voltage is too low coming in, the amps will shut down so they don't overheat. Once they've cooled off and the volume level is lowered they will kick in again. Low voltage and a heavy draw will create massive amounts of heat.

May 24, 2011 | Jl Audio 500/1 Car Audio Amplifier

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I wanna supplied my Amplifier Lanzar MNX 250 with an 12V - 30 Ohm battery, but the led of my amplifier is red and my speaker doesn't play music. How can I fix the "protect mode" in which the...


  1. The battery is 12 volts and Ohms has nothing to do with your amp installation.
  2. Was the amp running and got hot? Many times an amp will go into "thermal mode" when used for an extended amount of time and need to cool down but I assume if you are trying to hook it up you were not using it.
  3. You need to check the ground wire real well. A loose ground will cause protect mode.
  4. Recheck the speaker wires and their connections. If they cross this to can cause protection mode.
  5. This is a 4 Ohm amp, are your speakers 4 ohm or lower> If not then you may be running to low of a load to your amplifier.
  6. I always remove everything from the amp first and power it on and then add wires and see where which connection throws the amp into power mode.
  7. Check the fuse as well but if the LED is on chances are your fuse is good.
  8. If you check all of the items I listed and the amp still goes into protect mode then your amp is bad.

Regards, Tony

May 05, 2011 | Lanzar MNX250 2Channel Car Amp

2 Answers

I looked up the correct way to wire my JL 13.5W7 1.5. Therefore it said to wire it in parrallel. I understand this will put it at .75 ohm. As I start to turn it up it sounds great, very loud but once the...


1000/1v2 Class D Monoblock Subwoofer Amplifier Specifications:
  1000/1v2

Rated Power:
1000 W RMS @ 1.5 ohm - 4 ohm (11V-14.5V)

THD at Rated Power:
<0.05% @ 4 ohm

S/N Ratio:
>95dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)

Frequency Response:
5 Hz - 250 Hz (+0, -1dB)

Damping Factor:
>500 @ 4 ohm / 50 Hz


According to the chart your amp is only stable down to 1.5 Ohms, so running at .75 Ohms the noise you are hearing is the amp clipping (running more power than it can handle at low ohms)
I would suggest wiring it in series, or you could adjust the gain on the amp until the popping goes away.

Hope this helps.

Nov 10, 2010 | Jl Audio 13W7 Car Subwoofer

1 Answer

I have an spl 1440 watt amp model st2-1440 that i cant get to turn on without 15 volts to the remote wire and then it gets really hot really fast. Any ideas why or how to fix it?


Generally a battery puts out 14.1 volts to the amplifier. The only way your amp would get really hot really fast is if the amp was configured to run at to low of an ohm load.

That amps spec is to run at 2 ohm stereo. But I do see an option to get 1400 watts with 2 ohm mono, but that would require 2 dual 2 ohm subs using only one voice coil bridged to the amp. If you run both subs with both voice coils in parallel you'll get a 1 ohm load and that will overheat your amp.

Reference: http://www.sweetwater.com/forums/archive/index.php/t-2193.html


Ohms are the units that impedance is measured with. You can kind of think of impedance as the measure of how hard the amp has to push to get current to flow. The lower the impedance, the more power will be output from your amp. Unfortunately, the amplifier circuit wants to push against something, so that if the impedance is too low, the amp can perform badly, and even overheat and burn out.

Hope this helps!

Aug 01, 2010 | Car Audio & Video

1 Answer

Low ohms light flashes and bass distorts at high volume


Sounds like you need to invest in a capacitor. Those are used when subs receive a bass spike. You just a need a 1 Farat Capacitor (1,000 watts) ran between the head unit and the amplfiier to fix your issue. Also, try reducing the volume gain to half gain and low pass frequency to half gain; this will increase your clarity and make your amp less hot. This may fix it without a capacitor. Also find out what amprage your alternator is. Your alternator may not be designed to run the amplifier. Most alternators are 200 amps now if they are gold plated.

Hope this helps

http://www.onlinecarstereo.com/CarAudio/ProductDetail.aspx?ProductID=20378

Feb 10, 2009 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

Trying to figure out what kind of amp i got amercian pro vs-3507?


The VS3507 Is a class D monoblock.
Your optimum wiring for this amplifier is a 2 Ohm load - so it produces its full potential power of 350W RMS.

To Achieve a 2 ohm load, the most common load is one of the following...
(1) Dual 4 Ohm Voicecoil Subwoofer Wired in Parallel.
(2) 4 Ohm Voicecoil Subwoofers wired in Parallel.
(1) Quad 2 Ohm Voicecoil Subwoofer wired in Parallel/Series.
(1) Single 2 Ohm voicecoil subwoofer.

American Pro VS3507 2000W Car Audio Monoblock Amplifier
American Pro VS3507 Monoblock Amplifier Details
  • Built-In Crossover
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  • Phase Shift Control
  • Subsonic Filter
  • Bass Boost Control
  • Dancing Lights at the Rhythm of Music
  • Protection Circuits
  • Gold Plated Terminals
  • Power & Protection Circuit LED
  • 1 x 250 Watts RMS @ 4 Ohms
  • 1 x 350 Watts RMS @ 2 Ohms Thanks for using FixYa - A FixYa rating is appreciated!!

Jan 29, 2009 | American Pro Car Audio & Video

2 Answers

Low ohm light wont go off


It's likely that the output transistors failed in the amplifier and it will need to be repaired.

Nov 08, 2007 | Jl Audio 500/1 Car Audio Amplifier

2 Answers

Need help with cooling fan


Recheck your wiring if this is a new problem. Or if you know someone with a multimeter put it on ohms and check the resistance on the subs. Or if you have multiple subs unhook them all and hook them back up one by one and run it in between to see if the amp runs cooler. Remember you can not go to low on ohms. speakers hooked in parallel brings the ohms down fast. Four ohms and four ohms in parallel equals 2 ohms and so on. check the manual or on the amp somewhere to see how low of ohms you go.

Aug 25, 2006 | Kenwood Excelon KAC-X541 88W x 4 Car...

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