***Working Man's DIY Dedicated Home Theater*** - Page 22 - AVS Forum

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Dedicated Theater Design & Construction

NicksHitachi's Avatar NicksHitachi
11:39 AM Liked: 166
post #632 of 664
06-27-2014 | Posts: 3,733
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Help!
Attached: image.jpg (298.9 KB) 
J_P_A's Avatar J_P_A
11:57 AM Liked: 267
post #633 of 664
06-27-2014 | Posts: 4,172
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Quote:
Originally Posted by NicksHitachi View Post
Help!
Oooh, Oooh! I see it. It's either the red CAT cable or the gray power wire that's the problem!

Acoustic treatments look good!
KNKKNK's Avatar KNKKNK
12:13 PM Liked: 76
post #634 of 664
06-27-2014 | Posts: 873
Joined: Feb 2009
If time starts running out... Cut the green wire with the red stripe.. or was it the red wire with the green stripe......
TMcG's Avatar TMcG
12:56 PM Liked: 319
post #635 of 664
06-27-2014 | Posts: 2,797
Joined: Mar 2010


+ MicrobrewS for TMcG =




NicksHitachi's Avatar NicksHitachi
01:09 PM Liked: 166
post #636 of 664
06-27-2014 | Posts: 3,733
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Bahaha it wasnt THAT BAD before i tore out all the equipment...

Sometimes you gotta tear something up to make it better!
doublewing11's Avatar doublewing11
01:12 PM Liked: 321
post #637 of 664
06-27-2014 | Posts: 3,879
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Quote:
Originally Posted by TMcG View Post


+ MicrobrewS for TMcG =



Maybe I should start drinking..............wished my cable system looked like that!
NicksHitachi's Avatar NicksHitachi
06:15 AM Liked: 166
post #638 of 664
07-15-2014 | Posts: 3,733
Joined: Jul 2007
Workingman's theater is still broke down....

While rack was torn out I decided to do it right when I put it back together. I ordered standard rack rails, shelving, and other parts to make rack standard. Since so much of my gear is becoming pro gear with rack mount ears it just started to make more sense, not to mention it should look better and perform better also.





I also ordered a rack mount box which I'll be mounting my minidsp into along with xlr panel mount jacks to make it a tidy box that will also mount in the rack. In case your not familiar the cables have to be stripped and converted to phoenix connectors and that makes for a messy setup IMO without mounting in a box. This will be a fun project I think, I've only seen a couple other people do this and look forward to trying my hand at it. I got the box 2U tall so I can fit another minidsp in there if(when) I need more dsp capability.

Also I found a really cheap source for rack stuff. I haven't received the stuff yet so I'll hold back from a recommendation just yet, but their prices and shipping were extremely good. Here is the box I got to mount the minidsp into:



The door and trim for the rack is complete minus glass installed I'll get some pics of that within a few days and hopefully get glass installed also. I'm hoping to get rack back together within a week or two and then start on my surround speaker build:


J_P_A's Avatar J_P_A
06:57 AM Liked: 267
post #639 of 664
07-15-2014 | Posts: 4,172
Joined: Dec 2008
I'm anxious to hear what you think about those surrounds! I'm considering those as well.
Mfusick's Avatar Mfusick
08:04 AM Liked: 1016
post #640 of 664
07-15-2014 | Posts: 24,220
Joined: Aug 2002
Nick,

Why the coax instead of the waveguide for surround ?
Bassment's Avatar Bassment
08:25 AM Liked: 164
post #641 of 664
07-15-2014 | Posts: 899
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Awesome theater. I'm stealing your landscaping fabric idea for the acoustic panels! I was looking for something cheap to cover the backs of the insulation with, that is perfect

Also really cool diffusor's you built.
NicksHitachi's Avatar NicksHitachi
10:45 AM Liked: 166
post #642 of 664
07-15-2014 | Posts: 3,733
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Quote:
Originally Posted by Mfusick View Post
Nick,

Why the coax instead of the waveguide for surround ?
Form factor is one major reason. AFA performance, center to center distance of the woofer and compression tweeter is 0 so that avoids phase shift for listening positions off axis. IOW when listening on axis to a 2way it should sum nicely for a flat response but as you move further below the vertical axis the speaker the distance to the waveguide gets longer than the distance to the woofer causing phase issues and nulls at crossover unless the speaker is designed that way. For coaxials the center to center is always 0 since they coincide.

It has to do with time alignment of the drivers and the forward lobe of the speaker. Sometimes speaker designers will say the forward lobe tilts slightly downward, that means slightly below on axis the drivers are perfectly time aligned and in-phase. Upward obviously means the opposite.

This comes up a lot when measuring speakers, the exact axis to measure the speaker determines summation at crossover. If you were sitting extremely off axis on a two way with waveguide, you might even find the frequency response to be flatter if you inverted polarity on one of the two drivers, they might actually time align better.

Thats the short answer.....

Quote:
Originally Posted by Bassment View Post
Awesome theater. I'm stealing your landscaping fabric idea for the acoustic panels! I was looking for something cheap to cover the backs of the insulation with, that is perfect

Also really cool diffusor's you built.
Thanks! Go for it! No patents here....
Mfusick's Avatar Mfusick
02:15 PM Liked: 1016
post #643 of 664
07-15-2014 | Posts: 24,220
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The polarity on my FUSION 8's are reversed (tweeter from woofer) and I always thought the tweeter being set farther back in the cabinet with the wave guide in front corrected the time issues ?
HopefulFred's Avatar HopefulFred
02:41 PM Liked: 226
post #644 of 664
07-15-2014 | Posts: 2,927
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Often, Mike, that's true - but it depends on the phase shifts caused by the crossover. Different filter types have different phase behavior.
NicksHitachi's Avatar NicksHitachi
05:30 AM Liked: 166
post #645 of 664
07-22-2014 | Posts: 3,733
Joined: Jul 2007
Mounted Minidsp in Rack Box:










Here is how i handled grounding the shield(pin1) on each input and output:

One short jumper wire from pin1 to body pin.





DIY Rack Mount Minidsp Balanced 2x4 Enclosure

Now I can finish the rack. The rack rails are in and several shelves mounted. Now just need to mount pro gear, install glass in door, and hook it all back up.....

The on to speaker building!!!! Woot!
NicksHitachi's Avatar NicksHitachi
08:10 AM Liked: 166
post #646 of 664
07-24-2014 | Posts: 3,733
Joined: Jul 2007
So I guess I can add running one or two more 30A lines to my theater to-do list.... I contacted my electrician today for options.

I found a deal too good to pass on for two more EP2500s

I'm gonna use the two new EP2500s for the mains(3 of 4 channels). My mains stay just under full excursion with 450W with a LR-4 in place at 80Hz. I'll never probably need that power but its good to have too much than too little.

The fourth channel i'll run to the Maelstrom 21. I want to pull it out of the wall(IB) and make a box for it to go up front in the middle front of the screen. The IB tansmits too much energy to the structure in its current baffled installation. If I had another and could install them opposed that would be an awesome option but they are NLA. One channel of the EP2500 will be significantly anemic for that driver in any reasonably sized enclosure but I don't want to put too much power through it as it was one of those "Vegas Subs" that Kevin Haskins liquidated super cheap which most likely has the epoxy problem on the shorting ring. If you heat up the motor too much the shorting ring might come loose and start rattling around in the motor.

The other two EP4000s I'm using to run my sealed MFWs(X8).
NicksHitachi's Avatar NicksHitachi
02:22 PM Liked: 166
post #647 of 664
08-10-2014 | Posts: 3,733
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Got a build thread going in the DIY speakers forum for my Volt-10s finally....

Check it out!

Get Bent With A Curvy Volt-10
seanh1978's Avatar seanh1978
09:34 PM Liked: 10
post #648 of 664
08-29-2014 | Posts: 42
Joined: Nov 2011
Not sure if this the right place but here goes

I bought some wall plates with speaker binding posts and I can't seem to get sound now. I've tried banana into the front and out of the back of the plate as well as bare wire out of the back of the plate. No sound at all, any ideas ?
NODES's Avatar NODES
09:43 PM Liked: 64
post #649 of 664
08-29-2014 | Posts: 729
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I applaud you for the cable management...you sir are clean.
NicksHitachi's Avatar NicksHitachi
05:41 AM Liked: 166
post #650 of 664
11-11-2014 | Posts: 3,733
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Quote:
Originally Posted by NicksHitachi View Post
So I guess I can add running one or two more 30A lines to my theater to-do list....
Well, the major holdup on getting the Workingman's Theater back up and running is complete. Two more 30A mains drops to the rack complete for a total of 80A current. That should be more than enough

I should probably post some embarrasing pictures of just how destroyed it looks. Amps, wires, baseboard, chairs, beer bottles, and other misc scattered about. Maybe that would encourage me to get it done.

Anyways here is a final look at the surrounds I just built:






Mr.Tim's Avatar Mr.Tim
06:13 AM Liked: 66
post #651 of 664
11-11-2014 | Posts: 2,216
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As always, the speakers look fantastic. Which finish did you use for the clear?

Looking forward to seeing some progress pic of the theater!
NicksHitachi's Avatar NicksHitachi
06:28 AM Liked: 166
post #652 of 664
11-11-2014 | Posts: 3,733
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I went with brushing lacquer(gloss) and rubbed it out to high gloss. The look good to me but were mega work.

Hopefully we will get it back together in short order.
NicksHitachi's Avatar NicksHitachi
05:09 AM Liked: 166
post #653 of 664
11-24-2014 | Posts: 3,733
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Working...

Pulling wires....

Tearing stuff up....

Making it more better.....
Attached: image.jpg (257.0 KB) 
NicksHitachi's Avatar NicksHitachi
05:13 AM Liked: 166
post #654 of 664
11-24-2014 | Posts: 3,733
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nother pic
Attached: image.jpg (174.9 KB) 
Mr.Tim's Avatar Mr.Tim
05:34 AM Liked: 66
post #655 of 664
11-24-2014 | Posts: 2,216
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You're killing me with those photos! Might just have to drive up and see it in person.

Tim
rms8's Avatar rms8
05:51 AM Liked: 33
post #656 of 664
11-24-2014 | Posts: 456
Joined: Jul 2002
Dude, these pics are 1) blurry and 2) upside down.....

Borrow someone elses' camera!
Mfusick's Avatar Mfusick
06:00 AM Liked: 1016
post #657 of 664
11-24-2014 | Posts: 24,220
Joined: Aug 2002
I like the term "moar". I also like your term "more better". In fact I like them both significantly more than your photo posting skills. I'll hang around and hope for a better pic
NicksHitachi's Avatar NicksHitachi
06:10 AM Liked: 166
post #658 of 664
11-24-2014 | Posts: 3,733
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Bahaha yeah sorry about the pics guys it was an afterthought during some serious work....

Hey Blurry pics better than no pics right? Or maybe not for these fuzzy wuzzies... IDK.
@Mr. Tim once its back together I hope someone will come check it out, Ive never had another member visit, yet.

Even photoshop cant help these poor photos, they are now different but idk if any better.




Attached: image.jpg (902.6 KB)  image (1).jpg (238.8 KB) 
hanesian's Avatar hanesian
12:40 PM Liked: 40
post #659 of 664
11-25-2014 | Posts: 2,798
Joined: Nov 2008
Nice. Those photos bring back vague memories of lost weekends from my wayward youth - blurry and hard to make out!

Drive by Critic Hanes
NicksHitachi's Avatar NicksHitachi
03:16 PM Liked: 166
post #660 of 664
11-25-2014 | Posts: 3,733
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iphone pics in the theater normally don't work......

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