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DIY SEOS for HT upgrade - Page 3

post #61 of 238
Thread Starter 
Marty,
My L/Rs will be the delta-lights in 2 cu ft. seaed boxes (under SEOS12/360s). I have flat packs on order with Erich.
post #62 of 238
How's the crossover coming along?
post #63 of 238
Thread Starter 
drewmc (all),
Thanks for checking in! Funny you should ask about the crossover - just finished it up yesterday.
Also note the box now has round-overs (also gave all edges a brushing of 50/50 glue/water to help seal them up before the primer goes on)


So my aspiring BSEE son walks in; as I am finishing the XO, his sarcastic comment:
Gee Dad; never seen a high tech, surface mount board that uses BOTH hot-glue and 12 ga wire smile.gif


I told him not only is it surface mount, it is also Double Sided !!


Today I hope to get a primer coat an, and then a latex flat black paint for the first coat.
My final finish will be Duratex (everything I have read says that Duratex "plays best" with water based latex coatings, and for a filler use latex spackle)
post #64 of 238
Crossover looks clean, nice job!
post #65 of 238
Thread Starter 
Thanks Brad!
I should have proof if it works by NYs Day...
post #66 of 238
I am just curious as to how you did the crossover, since to my knowlege, there wasn't a design already in place for this speaker since it is a one-off, right? Or did someone else already build this and come up with a crossover on their own? Also, which mids are you running under the Seos-12/DNA360? Sorry if that has already been mentioned, I am just too lazy to read back through the thread biggrin.gif
post #67 of 238
Quote:
Originally Posted by Martycool007 View Post

I am just curious as to how you did the crossover, since to my knowlege, there wasn't a design already in place for this speaker since it is a one-off, right? Or did someone else already build this and come up with a crossover on their own? Also, which mids are you running under the Seos-12/DNA360? Sorry if that has already been mentioned, I am just too lazy to read back through the thread biggrin.gif

Its all in here Marty
http://www.diysoundgroup.com/forum/index.php?topic=101.0
post #68 of 238
Looking good man! Nice looking crossover work. Hope no changes will be needed after some listening.
post #69 of 238
Thread Starter 
Thanks!
I'm mounting the xo board into box with Velcro.
Box has removable back. Hopefully will never have to reopen it :-)
post #70 of 238
Great looking crossover! Very neat layout. I look forward to your your thoughts on the sound.
I hope to start working on my Daniel variant tomorrow.
post #71 of 238
Thread Starter 
Thanks Drew!

Also made some more sawdust tonight.
Made a stand to raise it up to the bottom of my screen (with a 14% upward tilt to the listeners ears).

Your variation sounds very interesting. Sounds like a great idea for front corners, combined with "matching" subs.....
post #72 of 238
Thread Starter 
So no photos and no graphs yet; However - Big Mal (BUC) is finished. After 45 minutes of quick comparisons to a Klipsch RC7 center, it 's all I can do to keep this silly a$$ grin off my face!!

All I can say is WOAH - this is awesome !!!!!!!!
post #73 of 238
Thread Starter 
Oh and I forgot:

Happy New Years to Everyone who happens bye!
post #74 of 238
Quote:
Originally Posted by cuzed2 View Post

So no photos and no graphs yet; However - Big Mal (BUC) is finished. After 45 minutes of quick comparisons to a Klipsch RC7 center, it 's all I can do to keep this silly a$$ grin off my face!!
All I can say is WOAH - this is awesome !!!!!!!!
I have that same center channel and was curious if there would be a noticeable difference. I also have quite a few of those NS6's and some TD12M's. Can't wait to hear a more in-depth comparison.

Cheers and Happy New Year!
post #75 of 238
Thread Starter 
Pg,

Thanks for stopping by. First I must say; so far I have enjoyed my Klipsch speakers, despite the fact that I naively buried my ported center channel in my overhead soffit before I had a good HT build plan.

That being said; pretty sure Big Mal is in another performance class. :-)

Wishing you a good New Years!
post #76 of 238
Great news! Glad you are happy with the first listen. Curious, what did did you choose for cabinet stuffing? How is the bass/midrange balance?
post #77 of 238
Thread Starter 
For the stuffing I used R13 fluffy stuff glued on with 3M spray adhesive .

Ran some frequency sweeps from a cal disc, and LF to mid-frequencies seem smooth
post #78 of 238
Call me silly, but you stuffed your speakers with cotton candy! eek.gif
Maybe "fluffy stuff" is fiberglass? Good to hear the the response is smooth. I look forward to seeing some plots.
post #79 of 238
Thread Starter 
Yep - I used R13.

My first graphs will be the low end as seen on the Velodyne SMS1. Those will be easy because all I have to do is plug in the Mic .

REW will be another story because I have to download newest version, and it's been a long time and I'm rusty.
post #80 of 238
Fiberglass works well and is cheap. I usually call it "ichy stuff". I am going to try recycled cotton batting this time around.
post #81 of 238
Thread Starter 
So my efforts of graphing with REW was a bust. Been a year since I used the setup and it seems my external sound card drivers are either missing or corrupt.

However the very bottom end (<200hz) as measured on my Velodyne look smoother than my Klipsch RC7 :-)
post #82 of 238
Any more thoughts on sq vs rc7
post #83 of 238
Quote:
Originally posted by Cused2
So my efforts of graphing with REW was a bust. Been a year since I used the setup and it seems my external sound card drivers are either missing or corrupt.

However the very bottom end (<200hz) as measured on my Velodyne look smoother than my Klipsch RC7 :-)

This may not be a fair fight. The RC7 will likely perform better if you pull it out of the soffit. and place it next to "BUC". Any floor bounce cancellation is above 200Hz.
post #84 of 238
Thread Starter 
PG,

Still listening and comparing , However as drewmc points out ; not an entirely fair comparison because my installation has put the Klipsch at a disadvantage.

Comparing as installed : BigMal is providing improved dialogue on a few challenging movie scenes I have just compared.

I wish I could get my REW setup to behave.
post #85 of 238
Thread Starter 
My final Big Mal build photos coming soon!!
post #86 of 238
Thread Starter 
After building the crossover; I primed sanded and painted (temporarily) the cabinet in flat black latex (final coat for Big Mal and my mains will be Duratex)


Then started some pre-wiring:


Then mounted the drivers, finished the interconnect wiring:


Almost forgot. a few shots to pre-drill for back-panel screws:



Then on to cabinet stuffing, first the back panel:


and completely stuffed:
post #87 of 238
Thread Starter 
And on a temporary stand (tilted up 45% to MLP), and hopefully a few FR graphs.
The mic is 2' from the baffle face


At this point I have dusted-off my REW setup only to fing my mixer/soundcard is not playing well with my laptop.

So the best I can do is some low-end, in-room comparison measurements with my Velodyne SMS a subwoofer system.
Here's the very low end from Big Mal


Big Mal replaces a poorly integrated RC7 that I naively buried in bass trapping (mineral wool) in my overhead soffitt, 3 years ago when I was truly uninformed smile.gif
this is the microphone positioned 2' in front of the overhead RC7:


And an in-room, low-end comparison graph taken with the same gain settings; when using the RC7 as the source:

No question; my original center chanel gives the RC7 an unfair disadvantage frown.gif

As for future measurements; I have the new USB DSP mic on order. Hoping for a more meaningful set of full range FR graphs using REW
post #88 of 238
Nicely done Craig! Man, I'm feeling the itch to build more speakers... tongue.gif
post #89 of 238
Thread Starter 
Thanks Brad - means a lot coming from you and your speaker building background!

I should have proofread my post better. My temporary stand is tilted up 14 degrees not 45 degrees.
post #90 of 238
Sweet, "BUC" does not look either ugly or too big under your screen biggrin.gif
Frequency responce much better below 200Hz than the RC7. This should integrate well with the subs at 80 or 90 Hz crossover.
Congratulations on the new addition to you HT family wink.gif
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