DIY SEOS for HT upgrade - Page 3

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.

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


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)

Thanks Brad!
I should have proof if it works by NYs Day...

Thanks!
I'm mounting the xo board into box with Velcro.
Box has removable back. Hopefully will never have to reopen it :-)

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.....

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 !!!!!!!!

Oh and I forgot:

Happy New Years to Everyone who happens bye!

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!

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

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.

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 :-)

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.

My final Big Mal build photos coming soon!!

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:

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
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

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

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.