lukeamdman

(8) Sealed Incriminator Audio Judge 21" build

459 posts in this topic

These Incriminator Audio Judge drivers have a custom suspension and had additional mass added (3 dust caps) to lower the Fs from the stock 34hz to 26hz.

 

The eight drivers are going in large dual-opposed boxes that are 24” wide, 22.5” tall, and 55” long (3" thick baffles).  That’s roughly 13.4cu.ft before drivers and bracing.  Stuffed in each cabinet is 6 pillows. 

 

I used 3/4” MDF and quadrupled the baffles.  Securing the drivers to the cabinets are 1.75” stainless steel #10 wood screws.  I could have used bracing that would consume less internal volume, but for this build I chose a simpler/faster approach. 

 

The two drivers in each cabinet are each DVC (1.5ohm per coil) with the coils wired in series and then the two drivers are paralleled, and then two cabinets are wired together in a series.  For the amplification the current plan is a pair of bridged Crest CC5500, which may change later to a couple SP2-12000 or K20s. 

 

Posted later will be frequency response sweeps and SpecLab captures.  

 

20151103_173902_zpsw0t9n1jb.jpg

 

20151103_220154_zpstrkvbz3f.jpg

 

20151106_105525_zpsksea1jlo.jpg

 

20151108_212225_zpsscsh9aay.jpg

 

20151128_212108_zpsqr5ffhzq.jpg

 

20151128_212154_zpsigz28ovn.jpg

 

20151212_120632_zpsczozmcgu.jpg

 

 

 

20151212_120833_zpscq0kfzze.jpg

 

20160218_102355_zpsx44r67q8.jpg

1 person likes this

Share this post


Link to post
Share on other sites

Finally got the drivers, cool.  What product do you use for the finish coat? 

 

Duratex with a textured roller. 

Share this post


Link to post
Share on other sites

Pardon my totally off-topic question, but why do you reserve the extra posts at the top of the thread when you can edit old ones?  Is there a limit on how long a post is?

Share this post


Link to post
Share on other sites

Pardon my totally off-topic question, but why do you reserve the extra posts at the top of the thread when you can edit old ones?  Is there a limit on how long a post is?

 

There's a limit to how many pictures can be in a single post, even if they're just linked from somewhere else. 

Share this post


Link to post
Share on other sites

Can I come over this summer :D

 

Of course!

 

You still haven't heard the mains after the massive EQ changes that were prompted from your first visit. 

Share this post


Link to post
Share on other sites

Can't wait to come down and help you out/listen. Are you going to try and get them placed?

 

I had some issues with the gasket tape I had so I had to buy some more yesterday.  Right now I only have one cabinet loaded and I doubt I'll have the other 3 done today.  I woke up with a cold so it's slowing me down, and we have plans for the kiddos today. 

Share this post


Link to post
Share on other sites

Awesome stuff!  I remember you saying you don't have much room gain?  Is that you? LT will be your friend if not. 

 

I certainly didn't in my old room, but I've never tried sealed in the new room.

 

The new room is smaller, has a concrete wall directly behind the LP, and the LP is on a wood riser.  I'm really hoping that combo will equate to something below 15hz this time around. 

Share this post


Link to post
Share on other sites

I had some issues with the gasket tape I had so I had to buy some more yesterday.  Right now I only have one cabinet loaded and I doubt I'll have the other 3 done today.  I woke up with a cold so it's slowing me down, and we have plans for the kiddos today.

 

Sorry you're not feeling well man. Have fun with the kids. We leave on Saturday and won't be back until the 1st (more than likely). I'm sure you'll have them done and set by then; sorry I won't be around to help.

Share this post


Link to post
Share on other sites

i had used 3/4" tape on my 21's. I also had some 1" tape that I have been using ever since. That is 1" wide tape. I am sure you know what your doing so just adding what worked for me.

Share this post


Link to post
Share on other sites

i had used 3/4" tape on my 21's. I also had some 1" tape that I have been using ever since. That is 1" wide tape. I am sure you know what your doing so just adding what worked for me.

I ended up using 1" as well.

1 person likes this

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now