Heres what I have. 1999 civic ex 4dr. I have an alpine cda-9087 reciever, all alpine type R speakers(components in front). I have an alpine mrv-t320 amp for the components thats on the side of my subwoofer box. I have a 800watt kenwood amp for my 2 infinity subs and on the other side of the sub box i have a 700 watt power inverter(i ahve the switch wired to the audio power wire so that it only turns on when i have the key to the acc. position or ON position). i have the power to the subs and the power inverter split with a distrib. block and the power for the alpine amp is on its own 8 gauge power cable from the battery.

A few days ago i ordered the auxiliry adapter for the cd player that converts the ai-net conenction to 2 rcas. from those 2 female rcas i hooked some old home audio/video rca cable to it(its male on both ends) that doesnt seem to have any protection at all except the plastic jacket on it. on the other end of the rca cable(running to my glove box) i have a female rca-to-headphone jack coverter that i want to hook intoi my laptop.

heres the deal...

I want to be able to have my laptop hooekd to the power inverter chraging while haveing it hooked to the auxiliry adapter for the sound. when i have the laptop itself hooekd to the auziliry converter it works great, crystal clear. but when i plug the laptops charging cable on the back it cuts all the sound out and makes that type of buzzing that is made when u plug in a guitar to an amp that is allready on except that sound is constant. does anyone know why this happens? is it because the RCAs that i have neen interference protection around them or another reason? any info would be helpful


Modified by silentblackhat at 7:25 PM 1/13/2005

 

buzzing is usually from an impedence mismatch in a power supply. Some of the current hits the load and then bounces back into the supply. I'm not sure why you are using a 120 volt invertor. Whats the output voltage on your power supply?

 

iv determined that it is the 120V side that is making the noise. its the interruption goin back from the power supply, to the computer and out the heaadphone jack and into the alpine reciever. is ther anything that could prevent this?
i am thinking that i need to get one of those computer backup things...that it actually runs off of a battery but the battery is charged all the time. i have one downstairs that i will try out later on when i get off work

Modified by silentblackhat at 1:13 PM 1/14/2005


Modified by silentblackhat at 1:29 PM 1/14/2005