no sound to sub

Set the meter to the AC volts scale,  with the music playing touch and hold the black meter lead to the negative speaker terminal of the amp.  Now touch and hold the red meter lead to the positive speaker connection of the amp.  The reading will jump around a lot, just let me know what the highest reading was.  Let it play for 20 seconds or so.    If you get no reading there, unplug the RCA jack from the amp and touch and hold the black meter lead to the shield (the outer ring) of the RCA cable.  Now touch and hold the red lead to the center conductor of the cable.   This reading is probably going to be in the Millivolt range.   Notice the highest reading you get here too.  Post the results. 

ok i got no readings from either..

Do you own a MP3 player? You can test amp input with one. Get a cable that has RCA plugs on one end and a headphone plug on the other. Plug correct end into proper place and play some music with volume low on MP3 player. That way you can rule out the head unit outputs being defective.The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.

Do it right the first time... or I might have to fix it for ya

wow good call.. it plays.. so its the rca's on the alpine

So all that to diagnose the head unit has defective outputs. Hope the deck is under warranty.The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.

Do it right the first time... or I might have to fix it for ya

so do i.. thanks for all the help guys

I highly doubt that the new alpine deck is your problem. What model is the deck?   Do you have some expensive cool looking RCA cables? If so I would start troubleshooting there. Also check in the menu to make sure the subwoofer is turned on. Or try another RCA jack on the radio. Not going to say it can't happen, but I find it odd to have a defective Alpine radio right out of the box.

yes i tried a whole new pair of rca's and draped them over the seat to make sure there was no pinches.. its the new ida-x300... i have the subwoofer setting turned on too.. i found it hard to believe at first too but then i came to the realization that i bought it off ebay and that kinda stuff happens

It may be possible it has a sub out that can be turned on or off in the menu settings.The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.

Do it right the first time... or I might have to fix it for ya