power going in ,no power from amp to sub

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=113069
Printed Date: May 05, 2025 at 6:23 PM

Topic: power going in ,no power from amp to sub

Posted By: hrkustomz
Subject: power going in ,no power from amp to sub
Date Posted: April 11, 2009 at 6:45 PM

I have an alpine deck iva-w205 , 2 amps mrd-m1005, and a 12" type x sub. I did a full custom enclosure but befor i set to paint it i want to test it out.

I have power going in to the amp and all is turning on.

When i test for power going to the sub i have no volts. i tried both amps. Same prob, I had the system installed befor in a simple enclosure and all worked.

I think i have a prob with my rca wires. I tested them and have continuity. So im wondering what readings should i get from the back of the deck at the rca points. or if there are any other test i can perform.

Replies:

Posted By: i am an idiot
Date Posted: April 11, 2009 at 7:09 PM

When checking audio voltages you need to have the meter on the AC Volts selection.

Posted By: hrkustomz
Date Posted: April 11, 2009 at 7:13 PM

i know that... Im wondering what my readings from the back of my rca out puts on the deck should be....

Posted By: i am an idiot
Date Posted: April 11, 2009 at 7:23 PM

With music playing, you will probably read about 1/4th of what the deck's preamp output voltage is rated at. 2V output probably reads .500 volts. 4V output will probably read around 1V. If playing a test tone, the proper frequency, it should be very near the rated voltage.