here's the thing,
in my trunk i have 2 rf power hx2s in a box wired in parallel to a memphis mojo amp. the box was never really secured well in the trunk and yesterday i noticed the fire extinguisher i had laying around in the trunk had gotten sandwiched between one speaker and the trunk wall (the side where the taillights are). i moved the fire extinguisher and now i see that one speaker moves like hell when bassing and the other one barely moves. at low volume the bass is MUCH less but at high volume it basses like normal (i think). i really hope this speaker isn't ruined, any tips/comments?

 

Pull subs and see that they are still wired. Also test each sub with Ohm Meter. hope this helps. 94

 

i kno it's wired because they are wired in parallel to a single channel. PLUS, they both still bass, one just move A LOT less than the other.

 

turn it off and push in the one you suspect is broken, listen for any noise(sometimes it will sound like paper ripping in half) no sounds should be no prob. Oh, is the one thats wired first in the parrallel wiring the one that moves more???

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by trouble codes &raquo;</TD></TR><TR><TD CLASS="quote">i kno it's wired because they are wired in parallel to a single channel. PLUS, they both still bass, one just move A LOT less than the other. </TD></TR></TABLE> I cant remember that sub, but if they are DVC , 1voice coil could be disconnected, also in a box if 1 sub is not connected it works as a passive radiator [still makes bass and still moves] you still have to remove them to check wiring and to test them puddz27 is right that test is to see if voice coil is damaged, but it will test top of coil, you need to be able to move cone forward to test back half . Take my advice have been doing this for 30 years. 94

 

i pushed it in, no irregular noises. i guess i'm gonna hafta take out the sub, but the way it was wired, i STRONGLY doubt one of them got disconnected, anymore suggestions?

 

the reason why one may move more than the other is because the one that is running may be moving the one that is disconnected. it may have somehow been disconnected within the box. if not then the speaker is blown, if the fire extinguisher was preventing the cone from moving freely then it could definatly be blown. The only way to check is with the use of a multimeter. check the impedence of the subwoofer. it should read 4 ohms.

 

it's very unlikely that one is moving the other because, although they are in one box, it's basically 2 seperate enclosures. i always thought that when most speakers blow, they short out. so if one sub shorted, wouldn't the system go under protect? or is the other sub still giving resistance?

 

even if they were in 2 differant boxs 1 sub will resonate [move] the other. The only way to test fully ,is to remove ,use multy meter to read imp. a 4 OEM speaker will meter out at about 3.7 OHMs [elec. imp.] this does not mean speaker is good, only that voice coil is not open or burnt. next , set speaker on magnet and move speaker cone in and out evenly and then in [lightly] on 4 points [one at a time] there should be no scaping sound from the voice coil, now hold speaker [with one hand ] up to your ear [cone side] and give the magnet a good smack [with other hand, there should be no "rattel" from voice coil ,last test ,hook up meter set to contenuity [beeeeeepp]move cone and "tinsil" wire [wires from term.to voice coil] the bbbbbeeeeepeppp should not stop. hope this helps 94

 

You can also smell the pole vent to see if it is blown. Blown subs usually have a burnt smell to them.

I think the smell comes from the glue that holds the voice coil to the former.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rochesterricer &raquo;</TD></TR><TR><TD CLASS="quote">You can also smell the pole vent to see if it is blown. Blown subs usually have a burnt smell to them.

I think the smell comes from the glue that holds the voice coil to the former.</TD></TR></TABLE> What he said. 94

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2ndchancehonda &raquo;</TD></TR><TR><TD CLASS="quote">if the fire extinguisher was preventing the cone from moving freely then it could definatly be blown.
</TD></TR></TABLE>

Good point. If the sub was unable to move then it would go from an inductive load to a purely resistive which is basically a heater and wouldnt last too long.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">

The only way to check is with the use of a multimeter. check the impedence of the subwoofer. it should read 4 ohms.</TD></TR></TABLE>

i dont know of any multimeters that can check impedence. The only ones i've seen can check for resistance.

 

my digital fluke can...