Coaxials: Another DIY Group Project. - Page 14 - AVS Forum | Home Theater Discussions And Reviews

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Old 07-20-2014, 07:11 AM
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Quote:
Originally Posted by chrapladm View Post
While this doesnt matter to most what are the maximum SPL levels you can achieve with the 8" Coax? 10"?

Just trying to see if I can use an 8". Again this will be used outside. Most likely the 8 will be fine for my app. Just curious of the answer is all. Has anyone done any "MTG90," like videos of the coaxials?
Ive been meaning to with the Volt-8 but Ive been super busy and every time i think i have time its raining
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Old 07-20-2014, 07:35 AM
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Quote:
Originally Posted by Sibuna View Post
Ive been meaning to with the Volt-8 but Ive been super busy and every time i think i have time its raining
You people with your busy schedule, things in your life and 24" subwoofers always have excuses

When ever you get a chance that would be great, thanks.
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Old 07-20-2014, 02:14 PM
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Originally Posted by Erich H View Post
It's the 8". The compression driver is built into the back and shares the magnet with the woofer. It does test better than the B&C and FaitalPro.
I imagine you mean freq resp.

It would be interesting to see the polars, which for the B&C's aren't half bad and I believe part of the reason Danley uses them.
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Old 07-20-2014, 03:49 PM
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Here is the off axis response of the 8" model (1/6th oct smoothing), the crossover is not done yet but it's close.
Also attached one at 10 degrees with 1/24th smoothing, you can see phase is not too bad either.
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Old 07-20-2014, 04:34 PM
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How consistent are the polars with a higher resolution plot? That 1/6 smoothed set looks really good for a coax. Thanks for posting that I don't think I've ever seen a full set of polars for a coax like that.

Does anyone have any for the volt models?
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Old 07-20-2014, 08:28 PM
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Thanks, pretty nice!

Do you have polars for an 8" B&C?

Quote:
Originally Posted by mtg90 View Post
Here is the off axis response of the 8" model (1/6th oct smoothing), the crossover is not done yet but it's close.
Also attached one at 10 degrees with 1/24th smoothing, you can see phase is not too bad either.

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Old 07-21-2014, 06:57 AM
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That looks pretty nice..... Whats going on at 700Hz? Is that noticeable to your ears? Too low to be breakup right? Maybe some resonance on speaker or enclosure?

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Old 07-22-2014, 02:22 AM
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So this model

Appears to be this one
https://www.parts-express.com/faital...-ohm--294-1192
Driver is $215 so full kit in the 260-280 range I'm guessing. Looks like it would fit in a small box too. Perfect for what I want. Would make a great addition to your lineup
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Old 07-22-2014, 06:08 AM
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yea that little guy looks like it would be perfect for a set of computer speakers in a small space
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Old 07-22-2014, 06:10 AM - Thread Starter
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There's a design already done with the FaitalPro 6" coaxial, but that's not the one used in that small box.

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Old 07-27-2014, 09:46 PM
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Can't wait to see one,hope the dimensions are for a sealed box.







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Old 07-28-2014, 05:08 PM
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Quote:
Originally Posted by chalugadp View Post
So this model

Appears to be this one
https://www.parts-express.com/faital...-ohm--294-1192
Driver is $215 so full kit in the 260-280 range I'm guessing. Looks like it would fit in a small box too. Perfect for what I want. Would make a great addition to your lineup
This is the one I need as far as size I want 4, what driver and cd is it?
What is the size of this box?
Thanks



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Old 07-28-2014, 05:44 PM - Thread Starter
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We need to come up with a box design that works for Atmos, then we can adjust dimensions. Angled, square, wide but shallow, etc. The box size in the picture you posted is something like 8" wide, 10.5" tall and around 7 or 7.5" deep.
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Old 07-28-2014, 06:01 PM
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Quote:
Originally Posted by Erich H View Post
We need to come up with a box design that works for Atmos, then we can adjust dimensions. Angled, square, wide but shallow, etc. The box size in the picture you posted is something like 8" wide, 10.5" tall and around 7 or 7.5" deep.
That's what i was thinking to use these for atmos, why not .
Also what coaxial is that in the picture, who makes it.
Thanks



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Old 08-03-2014, 04:39 PM - Thread Starter
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High end coaxials need high end enclosures. Here's some experimenting:

8" model:







I do have some other experimental stuff, but haven't taken pictures of that yet.
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Old 08-03-2014, 04:40 PM - Thread Starter
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6" model: Not sure I like the non circular frame as much as the 8" model.





This one is sort of like a marble style material and getting a good photo of it is not very easy for me. It looks much better in person.




Back side:

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Last edited by Erich H; 08-03-2014 at 04:44 PM.
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Old 08-03-2014, 05:58 PM
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I pray to baby Jesus that you're going to offer both of those sizes in the ported slanted box style for these high end coax's.
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Old 08-03-2014, 06:09 PM
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I am not much of a fan of the non-circular frames myself. That being said if it performs then I could look past that.
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Old 08-03-2014, 06:49 PM - Thread Starter
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My problem is a speaker grill. Seems kind of stupid to cover up such a nice looking baffle! But I can't seem to think of anything right now.

Jbrown15, these actually get down to around 80hz in sealed boxes, so no need for porting. They can even be run full range for music in a tower speaker!

I can't recall the exact internal volume on the 8" model, but I think it was about .5cuft. Not very big, but in Corian, it weighs around 30lbs! Obviously that wouldn't make much sense for an angled surround sound box.

People that have heard these 8" type coaxials are always surprised at how much volume they can put out. So it seems to me these would make for the perfect 'sleeper' system in a nice living room where you wouldn't want huge speakers. Small, nice looking with a high WAF, and louder than most would ever need.

The more I looked at the boxes, the more I was wondering about getting them made up, but still being a DIY speaker kit that came with an assembled box as well.

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Old 08-03-2014, 07:07 PM
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I'm happy to see some progress with these. I'm really interested in the 6" for surrounds and I'm hoping they can be used in a low profile/slanted box. Unfortunately the wife doesn't want "big speakers hanging on the wall."
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Old 08-03-2014, 07:47 PM
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Quote:
Originally Posted by Erich H View Post
My problem is a speaker grill. Seems kind of stupid to cover up such a nice looking baffle! But I can't seem to think of anything right now.

Jbrown15, these actually get down to around 80hz in sealed boxes, so no need for porting. They can even be run full range for music in a tower speaker!

I can't recall the exact internal volume on the 8" model, but I think it was about .5cuft. Not very big, but in Corian, it weighs around 30lbs! Obviously that wouldn't make much sense for an angled surround sound box.

People that have heard these 8" type coaxials are always surprised at how much volume they can put out. So it seems to me these would make for the perfect 'sleeper' system in a nice living room where you wouldn't want huge speakers. Small, nice looking with a high WAF, and louder than most would ever need.

The more I looked at the boxes, the more I was wondering about getting them made up, but still being a DIY speaker kit that came with an assembled box as well.
What about the smaller one? How low can they play? My room is smaller so I'm more interested in a slanted style box for the 6" to use as surrounds. Those ones really have my attention!
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Old 08-03-2014, 07:50 PM
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Quote:
Originally Posted by jbrown15 View Post
What about the smaller one? How low can they play? My room is smaller so I'm more interested in a slanted style box for the 6" to use as surrounds. Those ones really have my attention!
Yeah me and Joe don't listen at +10 reference like the crazies here
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Old 08-03-2014, 08:20 PM
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Originally Posted by chalugadp View Post
Yeah me and Joe don't listen at +10 reference like the crazies here
How about +18 like at Andrew's yesterday? All I can say is it was fantastic, but it will be years before my system is up to the challenge due to living in a townhouse (I think the police would be involved).


Looking forward to more of the 8" coaxial designs, I am in need of new surrounds in the next few months.

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Old 08-03-2014, 10:50 PM
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Hi Erich H,
What are the box dimensions for both the 6" and 8" coaxials. They look great.
Thanks




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Old 08-14-2014, 03:09 PM
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So I am ready to build some DIY rear speakers. I know this thread directed on some new upcoming projects but been kida stagnant for a few. So I figured I would ask here rather that the Sound Group Forum. My front speakers are 100db QSC 2150 with my sides being 97db Q!SC 8101 which leaves me deciding which to use for my rears. My last from of seat will be on a riser approx. 4 feet from my rear wall. I was thinking of building the Volt 10 with the slanted box. @ at price of $338.00 for drivers and box. OR I could build the Fusion 6 for $240.00 that's a difference of $98.00. Im just curious what I am giving up my building the Fusion 6 for rears? I thought perhaps the horn driver in the fusion would help with the seating distance for rear speakers. However the Volts would match closer as they are 95db.
I will defer to your expert opinions to those who have already built these speakers as to your opinionated recommendations. I am not looking to save $100.00 at the loss of sound quality and then end up replacing them with the Volts anyway. I'll still be keeping an eye of this page for Atmos speakers IF I decide to go that route In the future. Once these are placed into my theater, Ill be adding Wide speakers next. I'll wait of the height speakers until I decide on Atmos unless I build Volt 10 in the flat box and use them in my ceiling. Still waiting to see what the scientists come up with at S.G.

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Old 08-15-2014, 07:37 AM
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for surrounds it's more about dispersion pattern than sound quality. Coaxials have a wide dispersion to cover lots of seats, horn's have controlled directivity. It depends on your speaker location/angle/seats but you will probably be better off with the volts.
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Old 08-15-2014, 07:53 AM
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I'm gonna try my hardest to get an outdoor vid of one of the 8s playing this weekend

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Old 08-15-2014, 08:28 AM
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Quote:
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I'm gonna try my hardest to get an outdoor vid of one of the 8s playing this weekend

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That would be awesome.
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Old 08-16-2014, 02:07 PM
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ok so first vid, be warned the mic on my camera is not amazing, + it picks up everything thats going on in the world. the crackling you hear at the end of the first vid and on the 2nd vid (not uploaded yet) is the camera mic being maxed out (it is NOT the speakers), you also hear the focus motor which makes a grinding sound.

Vids should give you an idea, of what these can do. remember not designed for outdoor PA use.

Source is my phone running a stereo to RCA adapter to a Yamaha RX-A3000 running the volume at 0 in Pure direct mode

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Old 08-16-2014, 03:06 PM
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Quote:
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That would be awesome.


2nd vid
you can hear my cameras mic getting maxed out in this when im close its not the speaker

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Last edited by Sibuna; 08-16-2014 at 03:16 PM.
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