Question about Ultra Linear UL-2200D Car Audio Amplifier

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What does it mean when the led light on my amplifier turns on then quickly shuts of. I had my car stereo system going yesterday and installed a new amp today and it started happening, so I reconnected the old one and the same thing occurred. Could it be what the ground wire is grounded to?

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Yes always make sure you have a good ground

Posted on Aug 12, 2010


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I have a 2003 Nissan Sentra and when I'm driving all the gauges shut off momentarily and come back on! What can cause that to happen?

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My amp stopped workin, when i turn the stereo on, the green light is on, then when the music starts to play it turns red and stops working,

The red light on amplifier relates to power supply while the green light is indication of sound functionality. An amplifier that allows sound to generate should display both red and green lights. Howeever, some amplifiers would display only green as long as the sound is functioning.

Solving the problem

First, a red light still on means the power connections to the amplifier is fucntional least requirng repairs.

Second, the green ligh should turn on once the stereo were tuned up to produce sound. If the stereo is still on only least produce sound on the amplifier, check on the connection wires between stereo to amplifier that may have disconnected due to woofing or dubbing sound generals with unfirm wiring.


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My phoenix gold x200.4 amp turns on but the protect light keep on flashing

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