Humming noise when amp is powered on.

Check the fuse in your car's fuse panel. If it is burnt then change. If it is still good, check the fuse on the head unit and amp.

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go to the website that built the part. they usually have manuls you can download and get exact part number.. then go to ebay or google t for fix andddd parts cosr

Yes, it does sound like a bad power transformer. Try powering it using a DC supply or battery and see if the hum goes away.

My first suggestion is to check the gain setting of the unit. If it's above the 50% point, drop it down.

Second, verify your ground connection is good, short, and solid.

Do you have speaker wiring or RCA's hooked up from AMP to Basslink? Also check the settings, make sure you are have bridged the channels on amp.

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Hi,

Other than the +12V, the ground (-) and the 2 RCA inputs, normally external amps have also a remote trigger which switches it to active on. The remote trigger is activated by a wire from the head unit. Colors would either be yellow or blue but depends on manufacturer of head unit. Alternately, you can connect a simple toggle on/off switch to activate the external amp.

Additionally, pls verify that the 2 RCAs from your head unit are audio out and not audio in for aux source.

Good luck and kind regards.

Yes, The humming is always there you just can hear it better when the cd is playing. The humming is caused by the electrical system in your car. There is an inline filter you can buy and insert it between the car's power source and the head unit. I had a head unit I bought that was absolutly terrible until I installed that filter. Also if you did a do it yourself job on your amp wiring it is usually best practice to run your RCA cables on the opposite side of the car as your power cable. You can also purchase shielded spark plug wires which is a source of noise usually of a different kind tho. First make sure you have a good ground. This means that you have grounded your amp to bare metal not painted metal. If that didn't work put in the inline filter on the head deck as they are only $20 available at radioshack. If that doesn't work, go back an wire your car right this time and put the power and RCA on opposite sides of the car. If you still have that hum it may be the spark plug wires but that sounds more like static than hum. You have a text book case of alternator hum... Hack

if it is a powered sub you should lift the ground. you can do this by adding a three prong to two prong adapter. you know, like when you go to plug something in and the cord your plugging in has three prongs and the outlet your plugging in to only has two. it doesn't have the hole for the ground so you go get a little grey adapter that has three holes on one side and two prongs or tabs on the other.if that doesn't take the hum out (actually, is keeping the hum from getting in) you have a problem with the amplifier.