Question about Jl Audio 300/2 Car Audio Amplifier

2 Answers

JL 300/2 v2 Power Light Blinks, No sound out of Sub. Works in friends Car HELP

I just bought a new JL 300.2 amp,
i noticed when it hit really low beats the low ohm light would flash. So i turned the bass from the head unit down. While i was driving I turned up the bass from the head unit and cranked up the volume and put a heavy bass song on. After 20 minutes of listening to it the amp sub shut off and the amp did too.
it would flash the green power light every 5 seconds.
i took it out of my car (04 volvo s40) and put it in my cousins 04 VW passat. it worked fine in there.
Now im wondering if its my alternator? i checked the battery when it was off and the voltage ran at about 12.5 which is okay too.
I dont know, someone please help it would be greatly appreciated

Posted by on

  • ironmike1298 Oct 31, 2008

    i have the same problem but im getting a flash maybe every ten seconds and no sound from the subwoofers?

  • Anonymous Mar 22, 2009

    I HAVE A JL AUDIO 300 IT POWERS ON BUT NO SOUND THE BASS AMP STILL WORKS FINE

×

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 323 Answers

This is normally due to clipping of your sub. Try reducing your low pass frequency to half and volume gain on your amp to 1/2. Your amp circuitry is over-heating. It's not designed to run like that. Use minimal gain on your amp and use your head unit to increase your bass. Turn up your stereo 'til you begin to distortion from there adjust your gains to your listening volume.

Posted on Feb 10, 2009

  • Dalynn Turner Feb 10, 2009

    ironmike: The amp is going into protection basically.

    This is after excess play I'm gathering on ironmike issue.

    The amp is getting way too hot.

    You may have the subs bridged to too low of an ohm for your amp.

    If you run your amp at a 1 ohm load eventually a 2 ohm stable amp will shut off repeatedly after say 10 seconds, because the amp isn't designed for a 1 ohm load.

    I would try running your amp in stereo with the subs in parallel.

    + to +, - to - on amp. Dual Voice + to + to +, - to - to - inside box.

    The JL 300 is designed to run at 1.5 ohms.

    This wiring is 2 ohm stable.

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 631 Answers

Are you sure you don't have any shorted wiring or defective speakers?


Posted on Oct 01, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

JL Audio 1000/1 v2 distortion problem


Make sure all your connections are tight , really tight . Check ground , make sure it's to clean shiney metal. Three subs are going to have a low ohm load if paralleled . These amps are not 1 ohm stable ,if below 1.5 ohm's you will have problems. They need to be series paralleled to raise the ohm load. These amps put out the same power from 4 to 1.5 ohms.

Mar 14, 2012 | Jl Audio Car Audio & Video

1 Answer

I recently got a JL 300 amp and at first the sub stopped working, then it came back on during the song I was playing. Later on it shut off all together. I don't know what the problem is..


Does it only happen on that channel. It is a 4 channel amp so make sure the other channels are working. It sounds like an RCA input prob. Try the sub on the other channel. if it works then it would be your RCA input needs resoldered.

Sep 04, 2011 | Jl Audio 300/4 Car Audio Amplifier

1 Answer

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

1 Answer

I have a couple of questions regarding my jl 500/1. the first question: i just transferred my amp/subs (subs are JL W3s) to a new vehicle, and the place i had install it switched the "high/low"...


ok..well theres a lot of question in there, lemme take a shot at it.

the hi/low switch explained: the hi/low switch tells the amp what signal voltage is being delivered to the amp...hi-power (4-15volts) or low-power(micro-volts). Your aftermarket head unit had what are called pre-outs (or preAmp outs) meaning the source signal (your music) is not amplified before being delivered to the amplifier...sooo...your amplifier setting for your aftermarket radio would be 'low' to tell the amp that the music source being sent to it is low-voltage.

Typically a manufacturers radio will not have pre-outs, they will be amplified by the radios internal amp to anywhere from 4volts on up, and you need to tell your jl audio amp that the source music being supplied is 'hi' voltage.

soo...of course...if you are sending 10volts to the amplifier and tell it that your sending micro-volts (low setting) your amp will over-amplify the signal and thus the overwhelming bass you experienced.

May 14, 2011 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

Have a JL audio slash 500 that isnt putting out any audio... i know the sub is fine. but i noticed the RCA inputs are loose and dont hold the cables very tight.. is this my problem and what can i do to...


Yes it possible that the inputs have been damaged on the circuit board of the amp. If the amp has hi level inputs you could try running a speaker wire input to it and see if it works. You might try another pair of rca cables to.

Aug 20, 2010 | Jl Audio Slash v2 500/1v2 Car Audio...

1 Answer

I have a 500/1 mono jl audio amp and two w3 10" woofers, every time my bass hits hard my low ohm light will flicker on and off but the light doesn't stay on to long it only flickers every time the bass...


not really a problem, your just running a the threshold of the amps comfort zone, a lil trick to raise your impedance a little bit its to run an additional 10 feet of wire before your sub, (longer the wire the more resistance) 10 feet should jump you up about .5 ohms. you wont hear the difference but your amp will fill it, and run a little better. 20 feet will give you right around 1 ohm. now if you dont mind loosing some power run the subs in series and then run them bridged. your amp will work harder, but run easier because its on a big open loop. but before all this take a multi meet and read out your voice coils to see what the ohm level is, then read out what it is at the speaker, then you will see 1. if the subs are okay, and 2. how much you need to raise your impedance for you amp to run comfortably.

Aug 09, 2010 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

NO BASS!!


1) Check the Subwoofer for continuity - At the subwoofer, one at a time, test the terminals for Continuity using your Digital Multi-Meter; if your DMM doesn't have a Continuity test, use the Resistance, or Ohms, test and check for Resistance in the Subwoofer Coil (be sure to disconnect the subwoofer wiring before performing these tests).
2) If they test out good, hook the wires back up and test the terminals at the terminal cup or at the Amp hookup if you didn’t use a terminal, don't hook it up to the amp yet. Sometimes the wiring inside the box can be a problem if it has come loose, or isn't making a great connection.
3) If you have a Sub or multiple Subs with Dual Voice Coils, or multiple Subs with Single Voice Coils, make sure your wiring is correct by checking here:
http://www.the12volt.com/caraudio/woofer_configurations.asp
4) Make sure there are no Hi-Pass filters, crossovers, or multi Channel switches enabled.
5) Replace your RCA cable/s with known working RCA cable/s from the Source/Head Unit to the Amplifier/s.
6) Check your Head Unit settings; make sure the Bass is turned up and/or the Subwoofer setting is turned On.
7) If you are still getting no or low output, try plugging in an MP3 player or CD player using a headphone to RCA adaptor and check for sound output. If there is still no or low output, your Amplifier outputs are probably burned out.

Jul 18, 2010 | Jl Audio 300/2 Car Audio Amplifier

1 Answer

When i turn my system up past thirty my amp shuts off is it because of the ohms or what.How big of an amp am i allowed to use and how many ohms does the amp need to be? Thank You


Key things to check.
1. Make sure you have a good power and ground. Make sure you have a large enough power cable(4 gauge is a good start). The ground should always be attached to bare metal(remove paint from contact area).

2. Ensure your amps crossover is set to low pass and at about 80hz. Turn any bass boost off, and start with low gain.

3.Your enclosure should be 1.25 cu sealed, or 1.75cu ported. If you are too far off these numbers it can cause distortion and clipping.

4. For the single woofer your best amp solution would be a 300 RMS 2ch bridged to 4 OHMs. As long as you're running the sub at 4OHMs you shouldn't have a problem. Under-powering can be worse than overpowering.

5.If your head unit has high and low pass crossovers, set your low pass at 80hz as well. If the head unit doesn't have crossovers, then turn your EQ to flat.

If none of this helps, it could just be the amp.
Hopefully it helps, Plz Vote & Rate

Mar 15, 2010 | Jl Audio 12W1v2-4 Car Subwoofer

1 Answer

Got jl300/2 amp confused which subwoofer sounds good


Hello drsubhakar26,

JL W6's will perform well with from 150-600 watts RMS. W7's with from 150-500 watts. Less expensive Alpine Type R's work OK with from 200-500 watts RMS. Either of the brands will sound good. None of them will perform to their full potential with 300 watts RMS. Powering any sub with a 2-channel amp is a compromise. A monoblock is more efficient.

Hope this helps.

Jul 12, 2009 | Jl Audio Slash 300/2 Car Audio Amplifier

1 Answer

Jl audio 1000/1 low voltage -keeps shutting off at high volume


You should definitely upgrade the power wire to the sub amp to 4 gauge -absolutely your choking your amp its starving for current-poor thing is starving !!!!!!!

Apr 16, 2009 | Jl Audio 1000/1 Car Audio Amplifier

Not finding what you are looking for?
Jl Audio 300/2 Car Audio Amplifier Logo

677 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jl Audio Car Audio & Video Experts

Tygh Duval
Tygh Duval

Level 2 Expert

290 Answers

matthew walsh

Level 1 Expert

69 Answers

Professor_V
Professor_V

Level 2 Expert

92 Answers

Are you a Jl Audio Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...