no sound thru woofer

x[Alpine]x
x[Alpine]x Posts: 2
edited January 2009 in Troubleshooting
alpine cda-9884
alpine pdx 1.1000
alpine type-x 10"

monster cable RCAs connected + checked
power and ground to amp working
amp powers up and seems fine
subwoofer set to "on" on head unit
subwoofer level @ 5
gain up a little on amp
HPF @ 80Hz
tested sub with AA battery wiring to terminals, works fine

wondering how there could possibly be no sound...makes no sense to me
rest of speakers in car work fine, amp appears to be working fine
PLEASE HELP!!:confused:
Post edited by x[Alpine]x on

Comments

  • ShinAce
    ShinAce Posts: 1,194
    edited January 2009
    Check the crossover on the amp.

    Shouldn't be HPF! It should be LPF(low pass filter).

    You've told the headunit to cutoff anything higher than 80 Hz and then the amp to cutoff anything below 80 Hz. Result, a tiny bit of sound at 80 Hz.
  • x[Alpine]x
    x[Alpine]x Posts: 2
    edited January 2009
    on the amp it is LPF, set around 140Hz right now
    HPF was on the head unit -- for sound going to the speakers
    now HPF is totally off to eliminate variables
    subsonic filter on amp @ 15Hz

    still no sound :(
  • MattMF1
    MattMF1 Posts: 5
    edited January 2009
    grap a 3.5mm to rca wire and an ipod and jack it right into the amp. if you get sound then you know it is the head unit or rca's run between the two. if it dosen't work...then you can be sure the amp is most likely the problem.
  • ben62670
    ben62670 Posts: 15,969
    edited January 2009
    Welcome to Club Polk. If you creat a new thread in car audio you will get better attention from the car audio guys.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben