JL 13w1v2-4 Build

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ma7rix13

ma7rix13

Junior Audioholic
Aug 27, 2009
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NJ
And so it begins...
 

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Making progress...
 

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looks good... keep the updates coming... very interested in how its going to sound
 
Internals all glued up. It will not let me post any more pics yet...
 

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Man, that was a FAST build! Looks nice - solid and BIG! Enjoying the sound?

Thanks, had a long weekend off and got it done. With proper planning and tools, building a box doesn't take that long, its the finishing work that takes forever...

Even though it still is not setup correctly (running with 30Hz subsonic filter and no "line level boost") it is pretty awesome. My DCX is in the mail so once I get it running properly I'll give it a proper review.
 
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looks good

what are you gonna finish it with? Very nice by the way
 
what are you gonna finish it with? Very nice by the way

Not sure yet, I wanted to match my zmv5's with cherry veneer and texture front baffle, but I think that would be a little excessive for 6+ cu. ft box! I just think it would stand out too much.

Most likely will just do black texture all the way around.
 
Finally Finished

Haha,

Just realized it was almost a year until I painted this thing...



 
Yea, I know. I wanted to make sure I had some power in reserve in case I wanted to upgrade.

If I could only get rid of the darn hum I would turn it on more often...
 
Yea, I know. I wanted to make sure I had some power in reserve in case I wanted to upgrade.

If I could only get rid of the darn hum I would turn it on more often...

Is it a constant hum?

How do you have the amplifier configured and what type of connector are you using?
 
Yea, constant. I'm pretty sure its the cable.

I have subwoofer coaxial cable to xlr adaptor into DCX 2469, then EP2000.
 
Yea, constant. I'm pretty sure its the cable.

I have subwoofer coaxial cable to xlr adaptor into DCX 2469, then EP2000.

Scrap the coaxial cable for a twisted pair first. See if that clears it up.

Do you have the input level bumped up at all on the DCX or the Amplifier level set real high?
 
Yea, the input gain is +5 and the gain is up all the way. Lowering it does lower the hum a little bit but it is still noticable at quite moments in a movie.

What do you mean twisted cable?
 
Yea, the input gain is +5 and the gain is up all the way. Lowering it does lower the hum a little bit but it is still noticable at quite moments in a movie.

What do you mean twisted cable?


The construction of the cable. Instead of a coaxial design with a single conductor inside a dialetric, it uses twin cables, twisted, crossing each other at near 90 degrees many times. This allows cancellation of electromagnetic inducted noise. Switching to twisted pair cables eliminated the hum with my EP2500 as I had some induced noise into the system.

It also sounds like you may have a ground loop as well. This may be more difficult to diagnose. The key here is to diagnose which connected component is introducing the loop. to make this determination you will need to remove one component at a time from the receiver. Cable boxes are usually a good place to start as a common culprit.

Set your receiver's subwoofer output at +5 of 10 or so. Lower your input gain on the DCX to flat. Set the amplifier's gain to 50% and see if that helps you out. If it is not enough, then bump up the output gain on the DCX as necessary keeping it below clipping.
 
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