Question about Jl Audio 250/1 Car Audio Amplifier
I have the jl 250/1 amp and a jl 12in w3v2 and when i shut off my car a loud rumbling noice comes out of my sub. this only happens when the radio is turned on. the remote light on my amp takes around 20 seconds to turn off. could that be the problem?
Does it make noise if the RCAs are unplugged? If not, the RCA shield on your head unit may be burned open.
If the amplifier is set to signal sense, it will take longer for the power light to go off.
Posted on Nov 13, 2007
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Posted on Jan 02, 2017
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Mar 04, 2011 | Jl Audio 250/1 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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