Quad Dayton Audio HF 15" build - AVS Forum
DIY Speakers and Subs > Quad Dayton Audio HF 15" build
JonasW's Avatar JonasW 08:36 PM 11-25-2012
I had some problems with my SVS PB13-Ultra subwoofer bottoming out in some movies, portshuffing.

I was thinking about buying another one, when my acoustician (spelling? smile.gif ) told me a DIY build would get me more output and probably better sounding too, for less money. I was sceptical at first about building something that could outperform a PB13-Ultra, but started to read up on how to build.

We decided to go with the Dayton Audio HF 15" elements. Four of them in 2 subs with ~255 liters/each of net volume, before adding element and bracing inside of the box. For power we chose the Inuke DSP6000. It gives ~1100RMS W in 8 ohm/channel resulting in about 550W per element.

Here are a few pictures I took from the build:





And here are they after 3 layers of paint. My Audiovector K3 signatures look like toothpicks wink.gif



And how do they sound? Well, after Audessy and some use of the Inuke DSP, I got a flat response from 100Hz down to 25Hz, with a small housecurve in the lower 20's. The sound from these are _amazing_. Outperforming the PB13-Ultra in both SPL, depth and quality of the sound. These integrate so much better with my fronts and center, seamless.

Here is a unsmoothed graph (before using a housecurve) from REW with a calibrated mick and loopback calibration on the soundcard. The dB-scale is as you can see, not calibrated. The volume was about as high as I use when listening to music. I don't expect it to look exactly like that tough when watching movies at 85dB+. Not at 5hz wink.gif



At this volume I had under 1% distortion from 10Hz to 80Hz, REW won't show distortion under 10Hz.

You will have to excuse my english smile.gif

kcnitro07's Avatar kcnitro07 08:43 PM 11-25-2012
Looks real good. What do you think of the iNuke? I have a non DSP one n order (back order). I decided not to pay for the DSP because of the 20Hz limit.
JonasW's Avatar JonasW 09:17 PM 11-25-2012
Thanks.

I think it's great, especially for the money it costs.
I took a chanse here, knowing about the 20Hz lower limit. But as you can see, I got support from the room again after 10Hz.
So as long as I put a little housecurve at 20Hz, it doesn't fall that much below 20Hz.

It does sound alot, so I put it in the other room = problem solved smile.gif
filtor1's Avatar filtor1 10:02 PM 11-25-2012
Awesome job Jonas!!! They look intimidating in the room!
JonasW's Avatar JonasW 10:24 PM 11-25-2012
Thank you smile.gif

And I will agree on that, they are kind of mean looking wink.gif
ack_bk's Avatar ack_bk 10:29 PM 11-25-2012
Jonas. First of all, excellent work. Secondly, I am curious as. To the size of the room and whether or not your room is sealed, or open to other roooms.

Also, do you mind sharing the dimensions of your enclosures?
JonasW's Avatar JonasW 10:48 PM 11-25-2012
Quote:
Originally Posted by ack_bk View Post

Jonas. First of all, excellent work. Secondly, I am curious as. To the size of the room and whether or not your room is sealed, or open to other roooms.
Also, do you mind sharing the dimensions of your enclosures?

Thanks smile.gif

The room is 620cm x 345cm x 217cm in the cellar. It is closed to other rooms.

The enclosures dimensions are: 104cm x 67cm x 42cm. Built with 22mm MDF, double 22's on the baffle. They are filled with rockwool with the correct density, leaving 10-15cm around the elements.

If you would like to see the entire room, you could take a look in my build thread. It's in swedish, but I beleive the pictures says it all smile.gif
The first pictures are from when we bought the house, 2 years ago, the ones in the middle are my first setup and the latest pics are from when I built it again from scratch with the help of my acoustician.

http://www.hififorum.nu/forum/topic.asp?TOPIC_ID=87691
ack_bk's Avatar ack_bk 10:52 PM 11-25-2012
Quote:
Originally Posted by JonasW View Post

Thanks smile.gif
The room is 620cm x 345cm x 217cm in the cellar. It is closed to other rooms.
The enclosures dimensions are: 104cm x 67cm x 42cm. Built with 22mm MDF, double 22's on the baffle. They are filled with rockwool with the correct density, leaving 10-15cm around the elements.
If you would like to see the entire room, you could take a look in my build thread. It's in swedish, but I beleive the pictures says it all smile.gif
The first pictures are from when we bought the house, 2 years ago, the ones in the middle are my first setup and the latest pics are from when I built it again from scratch with the help of my acoustician.
http://www.hififorum.nu/forum/topic.asp?TOPIC_ID=87691

Excellent, I will read through your build thread. I am sure you are enjoying movies in the room now smile.gif
Stereodude's Avatar Stereodude 05:37 AM 11-26-2012
How did you get all those dowels to line up with the holes in the top piece? Or did you drill all the way though the top piece with it clamped on the box?
brian6751's Avatar brian6751 06:59 AM 11-26-2012
very well done.

i bet your thinking of some diy speakers now arent you?
zheka's Avatar zheka 01:45 PM 11-26-2012
Quote:
Originally Posted by JonasW View Post

Did you use Behringer UCA202 sound card by any chance?
Gorilla83's Avatar Gorilla83 01:49 PM 11-26-2012
Great job on your boxes, that bracing looks incredible. What did you use as a template for the bracing panels? Glad you are enjoying them as well!

Andrew
JonasW's Avatar JonasW 02:50 PM 11-26-2012
Quote:
Originally Posted by Stereodude View Post

How did you get all those dowels to line up with the holes in the top piece? Or did you drill all the way though the top piece with it clamped on the box?

A friend of my works as a carpenter, every piece is mounted like that and glued. It fits 100% perfect when you draw it in CAD. Then a machine takes care of the rest wink.gif I haven't used any spackle or sandpaper, it's so impressive to see the machines at work.
Quote:
Originally Posted by brian6751 View Post

very well done.
i bet your thinking of some diy speakers now arent you?

As a mather of fact, I am... My Audiovector isn't really made for my kind of listening (high volume...). It's either that or something like Procellas P6.
Quote:
Originally Posted by zheka View Post


Did you use Behringer UCA202 sound card by any chance?

I don't know where the soundcard's from, but it's sold from sofsci.com. It comes with a calibration file for the individual mic. Don't know how accurate it is, but probably good enough for a amateur.
Quote:
Originally Posted by Gorilla83 View Post

Great job on your boxes, that bracing looks incredible. What did you use as a template for the bracing panels? Glad you are enjoying them as well!
Andrew

Thanks! Template? I don't really know what your asking for, but my initial idea was a "flag" bracing like this one:



Then my carpenter friend came with the idea of the bracing we decided to use. He just drawed it into the CAD-program.
Gorilla83's Avatar Gorilla83 02:56 PM 11-26-2012
Ah, didn't realize you had access to a CAD! Awesome, you are a lucky man. tongue.gif

With access to equipment like that, I don't think I'd ever stop building. eek.gif
JonasW's Avatar JonasW 03:29 PM 11-26-2012
The chanse is, I wont tongue.gif:cool:

I have some space left in my back right corner me I my acoustician's going to take a look at. I still have som decaytime at 24Hz we might build more for.
I have gone from 1600ms to about 500, but it would be great to get even lower. I just might have to ask my friend to cut out some more material smile.gif
maxmercy's Avatar maxmercy 06:37 AM 11-27-2012
Great use of absorption and diffusion!

JSS
JonasW's Avatar JonasW 02:22 PM 11-27-2012
Quote:
Originally Posted by maxmercy View Post

Great use of absorption and diffusion!
JSS

Thank you smile.gif

I owe it all to my acoustician, he did a great job. The bass is so tight now with the short decaytimes.
I just have to get rid of my Audiovectors....the tweeter on these are a bit "too much" for my taste. Works with pop, but not metal and classic.
beastaudio's Avatar beastaudio 02:36 PM 11-27-2012
I should have known you liked metal when I saw the swedish reference. Nice to have more metal-heads around smile.gif
Gorilla83's Avatar Gorilla83 03:04 PM 11-27-2012
^ Refused - New noise = one of the best. biggrin.gif
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