DIY JL 12w7 + EP2500

[adamczap]

quick question, are you building the box according to JL recommended factory sepcs or are you compensating any enclosure space for HT application?

Right now I'm using a box that was built for a car application, and I believe it's tuned to ~30hz... a little too high.

 

[adamczap]

I'm lost in this thread:

- If you are still having hum issues, I got a little magical device called a ground loop isolator for the cable line that worked wonders. I got it at partexpress but I was having trouble trying to find the exact one on their website.

The ground loop isolator I saw on parts-express looks like it has 2 input/output. If I only have one sub hooked up right now (haven't purchased the other one yet), is that a bad thing?

 

[adamczap]

I'm lost in this thread:
- The basic setup for the DCX is pretty straightforward. I remember there was a good write-up on this in this forum or Home Theater Shack which walked through setting up an initial low-pass X-ovr and input/output gain. Everything that you will need to protect the JL from damage and get a little more adjustability due to the unbalanced/balanced line issues when you introduce pro audio gear. Then you will have to do the room eq stuff which will take a lot longer and a little more advanced setup with the DCX.

-IMO, putting two subs through the one hole is not a great idea. If you are set on 2 subs then they should be left/right subs (if that's possible). Maybe you are planning on doing that but it is not clear in previous posts.

It's not really that much more complex because it's under the stairs. My setup is basically just a big box that's hidden with the drivers firing into the listening area. For now I am going to have them both right next to each other, but I am open to the possibility of adding 2 additional subs in another area at a later date.

Can you by chance post a link to that DCX tuning article? I'm going to look for it as well...

 

[ma7rix13]

Here's a pic of the ground loop isolater: (it doesn't matter how many subs you have)



And, yea, you are adding complexity by putting the subs underneath the stairs b/c you have no ability to adjust the location and will rely solely on equalization. (I'm not a super expert like these other guys, so that is just my basic engineering estimate)

This might help: Basic Subwoofer Setup Guide NOT for Dummies — Reviews and News from Audioholics

- still can't find that DCX writeup...

 

[annunaki]

Here's a pic of the ground loop isolater: (it doesn't matter how many subs you have)



And, yea, you are adding complexity by putting the subs underneath the stairs b/c you have no ability to adjust the location and will rely solely on equalization. (I'm not a super expert like these other guys, so that is just my basic engineering estimate)

This might help: Basic Subwoofer Setup Guide NOT for Dummies — Reviews and News from Audioholics

- still can't find that DCX writeup...

Well in relying solely in eq you cannot ask for a better driver in the W7 (other than perhaps a TC Sounds LMS 5400). The extremely low power compression and underrated xmax make it a great candidate for such applications.

I just hope the location you chose for the sub is not a null at the seating location. Eq even with the greatest drivers cannot always overcome room acoustics.

In the case it could be you are going to have to heavily treat/modify the room to attempt to shift the null.