Question about Jl Audio 1000/1 Car Audio Amplifier
What does it mean when the low ohm light comes on and theres a high pitch noise
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Posted on Jan 02, 2017
SOURCE: JL Audio 1000/1
Check the resistance between the positive and negative terminals of the speakers. There should be atleast 1 ohm of reistance depending on your set up... if there is very little there is a short in your wiring. If not remove the wires from the amp and now check the resistance between the termanls on the amp...there should be no condinuity...if there is your amp has short circited out.
Posted on Mar 26, 2007
SOURCE: jl audio 500-5
Assuming that you've confirmed that the speaker is in good working order and that the wiring isn't shorted in any way...
There are separate power supplies for the high and low amplifiers. It's possible that the one for the sub output has failed. If that's the case, the output transistors probably failed and that's what damaged the supply.
Generally, I'm willing to help people repair their amps but this is a large, complex amplifier and it should be repaired by a qualified technician.
Posted on Apr 19, 2008
I would try running the subs in parallel. Pos to Pos Dual Voice, Neg to Neg Dual Voice. Then Run + to + stereo - to - stereo on both channels.
So you have + and - running to one channel and + and - running to the other channel.
Also your LPF filter could be set too high.
Posted on Feb 08, 2009
Tips for a great answer:
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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