Question about Car Audio & Video
Check the fuse(s). Check that the remote turn on connection on the amp is connected to the remote turn on line of the head unit. When in doubt, you can connect the remote turn on connection of the amp to the +12V connection to see if the amp turns on at all.
Posted on May 07, 2015
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Posted on Jan 02, 2017
SOURCE: 250/1 powers on but no output
If the amp is not going into protect, the power supply FETs have probably failed. In the corner of the amp near the toriodal transformer, there are 4 FETs against the heatsink. When these fail, the 47 ohm resistors at the base of the transistors often fail. If the resistors are dark, it generally means the FETs have failed. If you disconnect the amp from power and measure the resistance from leg 1 to leg 2 of the power supply FETs, a reading of near 0 ohms indicates the FETs have failed.
Posted on Dec 31, 2007
Well This is a interesting problem. In this amp chassis ground and Power supply ground should be the same. With no power applied measure resistance between amp's chassis and Ground terminal of amp. Should be Continuity (low resistance 1-2 ohms or less ) if not you have a burnt ground trace in the amp most likely because amp had poor ground to Ground terminal and was Drawing its current thru chassis or thru Rca Ground which I have seen happed on this amp in the past. F.Y.I I have repaired lots and lots of Rockford amps usually shorted mehsa bar (output / power supply rails) or burnt traces otherwise pretty tough amps. Questions firstname.lastname@example.org
Posted on Jan 11, 2008
SOURCE: my jl Auido 250/1 amp
You may have a bad output on the amplifier. I would recommend taking it to a local electronics repair to have fixed, or visit a local stereo shop - preferably a JL Audio dealer. Visit their website at www.jlaudio.com to find a dealer near you. You can have your amplifier sent in to JL Audio for repair by an authorized dealer and you'll get a warranty on the repair work.
Posted on Sep 28, 2008
your subwoofer is wired incorrectly to your amplifier. Figure out which ohm load of subs you have and then what ohm load options your amp is stable at. Next go to either the Crutchfield website. find their learning center. go to subwoofer wiring diagrams. or go to www.the12volt.com and find their section on it
Posted on Jun 14, 2009
Tips for a great answer:
Sep 12, 2011 | Jl Audio 500/1 Car Audio Amplifier
Dec 31, 2010 | Jl Audio 500/1 Car Audio Amplifier
1000 W RMS @ 1.5 ohm - 4 ohm (11V-14.5V)
THD at Rated Power:
<0.05% @ 4 ohm
>95dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
5 Hz - 250 Hz (+0, -1dB)
>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.
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