Polk lsim book shelf, blown crossover, need help to ID replacement parts

Options
LessOpinion
LessOpinion Posts: 2
in Speakers
I cannot read the resistor values. what I think is called a inductor (wire wound iron) next to it is not labeled with any info. Can you suggest up grades!
cg9833g0d1q7.jpg
· Share on Facebook

Answers

  • F1nut
    F1nut Posts: 52,406
    Options
    If you pull the crossover from your other speaker you'll be able to see the resistor values.
    · Share on Facebook
  • LessOpinion
    LessOpinion Posts: 2
    Options
    Maybe? Its blown also, I haven't looked yet.
    · Share on Facebook
  • VR3
    VR3 Posts: 29,751
    Options
    this is really uncommon for that model... what caused the issue? You had some serious juice to cook that big resistor there
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
    · Share on Facebook
  • billbillw
    billbillw Posts: 8,286
    Options
    I'm guessing an amp went bad and sent DC through the speaker cables. He might have other issues when it comes together.
    · Share on Facebook
  • Unknown
    Unknown
    edited July 24
    Options
    This content has been removed.
  • Unknown
    Unknown
    edited July 24
    Options
    This content has been removed.
  • mhardy6647
    mhardy6647 Posts: 35,562
    edited July 25
    Options
    If it were an amplifier failure (i.e., DC getting to the loudspeakers), it's kind of puzzling that both channels would've failed simultaneously, but yes, I agree with @billbillw's armchair assessment (FWIW). There's a good chance that we're seeing the horrific effects of catastrophic failure upstream of the loudspeakers. That should be examined and rectified (no pun intended) as needed before even thinking about the crossovers. Otherwise, the OP risks another round of crossover flambé. :o
    EDIT: Testing for DC on the output of the amplifier (sans installed loudspeakers) should be straightforward with a DMM. That said, besides the hardware fault responsible for the DC offset (e.g., a power shorted power transistor passing one of the rail voltages right to the speaker), the amp's protection circuitry (or fuse?!) would have also had to fail to work. Sort of a "China syndrom" symphony of failures :/
    I guess the other, not inconceivable ;) root cause might have been way too little amplifier (i.e., insufficient voltage/current delivery capability) for the load at the time of the immolation. :# Again, a situation that should be rectified first (i.e., replace with a more capable amp, or turn down the volume).
    · Share on Facebook