A 3 way 99db multi configurable SEOS design - Page 40 - AVS Forum
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DIY Speakers and Subs > A 3 way 99db multi configurable SEOS design
dtsdig's Avatar dtsdig 11:50 AM 07-22-2014
Quote:
Originally Posted by BCRSS View Post
I have mine arriving today and am trying to see what veneer I like. This one I like the best.

Yes my PS is weak.
I see that my photos are coming in handy for the photoshops!
I like that veneer choice. Looking forward to the build!

BCRSS's Avatar BCRSS 12:06 PM 07-22-2014
Quote:
Originally Posted by dtsdig View Post
I see that my photos are coming in handy for the photoshops!
I like that veneer choice. Looking forward to the build!
Yes thank you for such nice pictures. Helping me out a lot with picturing what the different veneers will look like.
dtsdig's Avatar dtsdig 12:07 PM 07-22-2014
Quote:
Originally Posted by BCRSS View Post
Yes thank you for such nice pictures. Helping me out a lot with picturing what the different veneers will look like.
Keep the ideas coming! I'm sure I'm not the only one trying to picture how these will look with different veneer options. How about one in a red mahogany?
tuxedocivic's Avatar tuxedocivic 12:44 PM 07-22-2014
You guys crack me up. Robert, those are hilarious. Gotta love that chick winning one.
blah450's Avatar blah450 02:15 PM 07-22-2014
Robert...how about Charlie Bucket clip running down the street with his golden ticket....errrr...I mean, Elusive 1099 in his hands??...
Gorilla83's Avatar Gorilla83 02:25 PM 07-22-2014
Guys - Any chance someone local to the PA/NJ/DE/MD/NY/VA area has a pair of these they would be willing to demo for a small group of guys in early August? There has been a bunch of interest to hear these.
tuxedocivic's Avatar tuxedocivic 03:52 PM 07-22-2014
Ok, here's the resistor option that I mentioned in the Vancouver GTG results thread, here: Vancouver Summertime GTG Results

Seems to me a few people thought these were a tad bright, although this is the first I've heard this remark. No one said it was a deal breaker, but we're after the best. Of course, sound is a subjective experience, so this option is for those who prefer a laid back, easy sound. The kit won't change, but possibly Erich will add a $1 to the kit price and include this resistor for those who do want to do it. For those who don't, they can just throw it away.

You'll need a 10 watt, 10ohm resistor. This one works: http://www.parts-express.com/dayton-...sistor--004-10

In the schematic, you have a 3ohm resistor coming into the circuit from the amp. Don't change that. Then after the capacitor and inductor there is another 3ohm resistor that crosses the wires (trying to explain this simply). What you want to do is parallel that 3ohm resistor with the 10ohm resistor. Like this.



Sorry, I used a 2.7ohm in the example because I couldn't find a 3ohm on hand. But that's what parallel is.

Alternatively, if your XO board isn't accessable, you could connet this 10ohm resistor directely to the back of the compression driver. Kind of like this bad example:



If you like a forward, exciting, snappy sound, this isn't really for you. Especially if using an AT screen, you'd probably wanna keep it stock. Certainly worth playing around with if you're so inclined. Try both ways and see which you prefer. It'll only affect the treble, and it'll be a fairly slight change. Don't expect a massive amount of change.

Also, if you run autoeq of some kind, manual eq, use a treble knob, or anything of the sort, probably easier/better to just do it that way. This is only for those who like to run in Pure mode or don't have a way to eq. Which we didn't do at the GTG.
tuxedocivic's Avatar tuxedocivic 03:55 PM 07-22-2014
This is the frequency response of the pair of 1099s we heard at the GTG. Note, this is a little different looking that the semi-ground plane measurement posted in the OP. This is free field gating applied at 180hz.



Here is the measured impedance as is.


Erich H's Avatar Erich H 04:00 PM 07-22-2014
Tux, are you going to update the first post with the optional resistor change? How hard is it to make a second schematic up and post it?
tuxedocivic's Avatar tuxedocivic 04:06 PM 07-22-2014
One final thing. When I measured and listened to the 228HT I noticed it's tuned quite high. This is to increase power handling, sensitivity, and midbass. Myself, I wouldn't do that. But I appreciated the design decision JTR made and wanted to offer that option here.

As is, the kit will tune you to about 50 to 55hz with a 20 to 30L box size. (depends on size, stuffing, etc.). Once the XO is applied, this gives a gradual roll off below 80hz that allows for a sub XO anywhere from 60 to 100hz easily. The 228HT is really limited to 80hz, but comes with some benefits. If those benefits were desired, simply reduce the supplied port length by 4cm.

Here is a model of the change. This is only relative as the XO creates some bass lift that Unibox doesn't know about.



Dark blue would be the new tuning. So you'd gain a couple db and reduce excursion above the tuning, but you'd have less subwoofer flexibility. Personally, I wouldn't do this. But there it is for the adventurous. 4cm off each port. These are plastic ports, maybe on a chop saw or something. I'll leave that for you to figure out.

NOTE: This is an undoable modification. Only at your own risk. This is DIY, good luck.
tuxedocivic's Avatar tuxedocivic 04:07 PM 07-22-2014
Quote:
Originally Posted by Erich H View Post
Tux, are you going to update the first post with the optional resistor change? How hard is it to make a second schematic up and post it?


I'm gonna update the first post with a link to these posts and the measured impedance instead of modelled. Another schematic can be done. I suppose the XO is no secret.
mbyrnes's Avatar mbyrnes 04:21 PM 07-22-2014
Is there really any need for the resistor? I ask because you didn't run any auto cal for the gtg. I think MCACC on my pioneer is already taming this "problem". I'll have to look again.

Since most people run some sort of calibration software is this really a problem?
blah450's Avatar blah450 04:21 PM 07-22-2014
"I'm gonna update the first post with a link to these posts and the measured impedance instead of modeled. Another schematic can be done."

Thank you, sir!!
tuxedocivic's Avatar tuxedocivic 04:22 PM 07-22-2014
mbyrnes, I totally agree and will add that line of thinking to the post right now.
BCRSS's Avatar BCRSS 04:27 PM 07-22-2014
LOL .... It is 102 here today and the FedEx guy shows up with 6 packages, (1099's and flat packs) caring them in 1 by 1 and sweating his @ss off. He said guys at his work were flipping a coin to see who would deliver them.
Erich H's Avatar Erich H 04:32 PM 07-22-2014
I would have flipped a coin to see who was going to package them up.......but it would have ended up being me either way.
Mfusick's Avatar Mfusick 05:01 PM 07-22-2014
The description as a tad bright is what makes me want them!
BCRSS's Avatar BCRSS 05:08 PM 07-22-2014
Quote:
Originally Posted by Erich H View Post
I would have flipped a coin to see who was going to package them up.......but it would have ended up being me either way.
You did a great job on the packing. Nothing seems to be damaged but can't find the schematic for the crossover in any packages. Was going to start with them tonite.
mbyrnes's Avatar mbyrnes 05:18 PM 07-22-2014
It's on the first page of this thread!
BCRSS's Avatar BCRSS 05:32 PM 07-22-2014
Quote:
Originally Posted by mbyrnes View Post
It's on the first page of this thread!
LOL didn't think about looking there. Thank you!!
chalugadp's Avatar chalugadp 05:34 PM 07-22-2014
When I'm talking tad bright I mean maybe eq 1 db down around 3-6 k. There not klipsch[emoji33]
mbyrnes's Avatar mbyrnes 05:37 PM 07-22-2014
Going off memory MCACC is dropping them 1.5db in that range. Would like to see what room correction is doing for everyone else. I wouldn't be surprised if all the different types are applying some eq in that range.

I don't find them bright at all and I am pretty sensitive to speakers like that.
Fatshaft's Avatar Fatshaft 07:49 PM 07-22-2014
Quote:
Originally Posted by mbyrnes View Post
Going off memory MCACC is dropping them 1.5db in that range. Would like to see what room correction is doing for everyone else. I wouldn't be surprised if all the different types are applying some eq in that range.

I don't find them bright at all and I am pretty sensitive to speakers like that.
Ya, these are not bright at all to me...actually they sound perfect to me and I ADD a little treble on my end.
I am 50 you know
I can hear 14KHZ no problem but have trouble hearing 15KHZ and is DEAD quiet at 16KHZ for me.
People need to know what High frequencies they can hear and adjust accordingly.

So for me No resistor change.

Love these mofo's!

For you TUX
Robert Jones II's Avatar Robert Jones II 08:34 PM 07-22-2014
Quote:
Originally Posted by tuxedocivic View Post
If you like a forward, exciting, snappy sound, this isn't really for you. Especially if using an AT screen, you'd probably wanna keep it stock. Certainly worth playing around with if you're so inclined.
What affect does the AT screen have on the sound when using this modification? Why would the effect be different in a non AT environment?
jbrown15's Avatar jbrown15 08:42 PM 07-22-2014
Quote:
Originally Posted by Robert Jones II View Post
What affect does the AT screen have on the sound when using this modification? Why would the effect be different in a non AT environment?
An AT screen will cut things down about 1-2dB depending on the screen.
Robert Jones II's Avatar Robert Jones II 08:52 PM 07-22-2014
Quote:
Originally Posted by jbrown15 View Post
An AT screen will cut things down about 1-2dB depending on the screen.
Ahh, okay. I must have misread the first time. So with this mod you lose some of the highs (which you would want if you thought they sounded punchy), and the AT screen would further knock some of those levels down. Does that sound accurate?
tuxedocivic's Avatar tuxedocivic 08:58 PM 07-22-2014
Ya, the AT screen cuts the top end already, so this mod would reduce it even more, and would be cut down to mic IMO. I suppose you still could do it, but you gotta wanna really laid back, dark, mellow sound.

Here's a thread I did some time ago testing different AT materials so you can see how much they cut out. If you had a really AT material you could do the mod.

http://www.avsforum.com/forum/110-diy-screen-section/1454505-acoustic-transparency-spandex-truth.html
sslv2pwned's Avatar sslv2pwned 09:53 PM 07-22-2014
Tux,

What speakers do you recommend for surrounds to match the 1099's?

What about front heights?

Sent from my Nexus 7 using Tapatalk
niktak11's Avatar niktak11 09:58 PM 07-22-2014
Quote:
Originally Posted by sslv2pwned View Post
Tux,

What speakers do you recommend for surrounds to match the 1099's?

What about front heights?

Sent from my Nexus 7 using Tapatalk
Just use 1099s for everything


tuxedocivic's Avatar tuxedocivic 10:37 PM 07-22-2014
Surrounds are very situation dependent. If you have the room, maybe Fusion 10. Volt 10 is certainly a good choice.
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