How to determine if 10W7 is blown?
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=15085
Printed Date: July 21, 2025 at 1:35 PM
Topic: How to determine if 10W7 is blown?
Posted By: Mattred3000GT
Subject: How to determine if 10W7 is blown?
Date Posted: June 17, 2003 at 8:37 PM
I hooked up my 10W7 and it sound like the volume is really low no matter how lound i turn my stereo up. I unplug the 10W7 and plug in my old sub.. it works fine.. I know it is not my amp but how do I know if my 10W7 is toasted or not? How do I check it? Can it be repair??? Thank you so much
Replies:
Posted By: djfearny2
Date Posted: June 17, 2003 at 8:41 PM
with the w7 series they require a lot of space and do not work well with sealed boxes. try making a port in the box and see what happens. if the box is too small and sealed you will not get the ample volume. (experience.) even jl does not recomend a sealed box those speakers love air and when you give it to them they will make you love them.,
-------------
Jon
Installer/Help Technician
---coral springs florida---
mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.
Posted By: Mattred3000GT
Date Posted: June 17, 2003 at 9:12 PM
djfearny2 wrote:
with the w7 series they require a lot of space and do not work well with sealed boxes. try making a port in the box and see what happens. if the box is too small and sealed you will not get the ample volume. (experience.) even jl does not recomend a sealed box those speakers love air and when you give it to them they will make you love them.,
Mine is ported custom box. The shop had a brand new 10W7 to make the box but when I got home and hook my 10W7 up.. it doesn't hit at all.. the sub barely made any bass or voice. It worked when i hooked up my other sub.. so my question is how to check if the sub is good or not? Thanks
Posted By: wvsquirrel
Date Posted: June 18, 2003 at 8:25 AM
Need a little more info. The 10W7 is a 3ohm SVC. If you're trying to bridge it to a 2-channel amp, you could be shutting the amp down with a bridged 3ohm load. What amp are you using and what was the other sub you referenced? ------------- Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com
Posted By: chasesaccessori
Date Posted: June 18, 2003 at 10:54 AM
Just take it back to the shop and make them deal with it... If you F**k with it you chance not having any warrantee at all.
Posted By: Mattred3000GT
Date Posted: June 18, 2003 at 11:38 AM
The shop made me a custom box for the 10W7 along with JL 500/1 amp. It is just weird the 10W7 got sound but it is very very low unless i put my ear right next to it. I then hook up my old sub and it worked just fine and loud. I am guessing it is the 10W7 either blown or the wire is lose in the sub?? I would love to go back to the shop but it is 2 1/2 hours drive. Thanks
Posted By: nedgeworth
Date Posted: June 18, 2003 at 3:46 PM
Well if you don't want to void your warrentee you don't have much of a choice. I suggest ringing them up and telling them about the problem. No doubt there solution will be bring it back into us. But yeap sound like either loose connections or screwed sub. Can you get your hands on another amp to test it though.
Posted By: djfearny2
Date Posted: June 18, 2003 at 4:09 PM
take a multi meter and set it on ohms and determine what the ohm rating is if your dont get an ohm rating something is wrong. that sub is i think three ohms or one ohm cause each coil is in parrallel to one connector. take the speaker out of the box and test the four wires on the sub there is two poss and two negative wires on each connector on the back of speaker test each wire to see what the ohm rating is i belive they are three ohms each but the way jl sets them up it turns them into 1 ohm load.
-------------
Jon
Installer/Help Technician
---coral springs florida---
mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.
Posted By: wvsquirrel
Date Posted: June 18, 2003 at 4:36 PM
The 10W7 is a 3ohm SVC ------------- Squirrel
"No more Cpt. Kirk chit chat"
If its too loud, then you're too old
Donate to the12volt.com
Posted By: fuseblower
Date Posted: June 27, 2003 at 9:48 AM
You might be able to go to any authorize dealer of JL and have them to look at the sub. Some dealers will gladly help you because they feel if they treat you right you will come back because of there service.
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