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DNA W/Alpair 10  Build (Read 280 times)
4krow
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DNA W/Alpair 10  Build
10/31/18 at 18:41:07
 
 I have decided to go ahead and build the DNA. I am using Alpair 10 drivers. I have also decided to build this first set using 1/2" MDF since I do not have enough of some of the other materials that I originally intended to use. I was going to use 3/4" Baltic Birch for the sides and top only, since it wouldn't affect the internal dimensions of the cabinet. Anyway, so far, I have cut the sides and cut 7" planks to be cut into the bracing soon. I have determined to the best of my ability the lengths of the braces, and am waiting for some angles to be figured out for me by someone who has that sort of talent. I won't be putting my utmost into the appearance of the cabinets, since this is more about if I will be interested enough to make a more serious try should these sound the way that I would like.
If not, then I will build a Frugal horn design that, even though it doesn't go as low as this design, are worth a spin as a second choice.
 More later, as in photos when I get a bit further into the build.
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Donnie
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Re: DNA W/Alpair 10  Build
Reply #1 - 11/01/18 at 15:35:28
 
I am looking forward to seeing your build.
Fancy woodwork always impresses me.
All of those angles will be fun to cut, I'd want to do it with a CNC and calculate all of the stepovers to get my angles. I'm sadistic that way.
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4krow
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Re: DNA W/Alpair 10  Build
Reply #2 - 11/01/18 at 17:10:39
 
OH OH,  You said 'fancy woodwork'. This is going to be one of those projects that I will take photos at certain angles, and then crop them 'appropriately' if you know what I mean.
 A long time ago, I owned a set of cabinets somewhat similar to these, as far as size. I am expecting some of the same results, and hopefully more bass. Pretty excited to get back in the shop and do some business.
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4krow
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Re: DNA W/Alpair 10  Build
Reply #3 - 11/02/18 at 20:21:46
 
Most every panel is now cut with the appropriate angles. Thanks to Donnie for his assistance with this part. That is what it is all about. Man, as usual, the MDF is nasty stuff, so I am happy to most every cut completed. Once the glue up is started, photos will be posted.
I plan to make the cabinets out of MDF, and then place maybe 1/2" thick over them.
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4krow
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Re: DNA W/Alpair 10  Build
Reply #4 - 11/10/18 at 02:15:01
 
A bit more work to go, but doing a bit of testing before I go further.
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Donnie
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Re: DNA W/Alpair 10  Build
Reply #5 - 11/10/18 at 02:37:25
 
Nice! I bet that they sound great too.
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Re: DNA W/Alpair 10  Build
Reply #6 - 11/10/18 at 03:08:09
 
Donnie, I have my fingers crossed. They are bass heavy right now. Not what I expected. Maybe I have too much batting in the compression chamber, dunno. But they have more bass than the FRX2/ZOB. The ZOB's are playing the left channel, and I use the switch in the less bright position to equal the sound between the two speakers. OF COURSE, I am not listening seriously at this time, just making a few comparisons for the hell of it. The Alpair drivers likely open up with a few more watts, but that will come later.They are muted sounding compared to the ZOB at lower volumes.

 It is getting colder here in WY, so I am going to do the basics for the cabinets, and then finish them in the spring. Keeping even a small shop heated here is a consideration from this time onto spring. i have all winter to break in the drivers and find if these are worth the build.
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Re: DNA W/Alpair 10  Build
Reply #7 - 11/11/18 at 23:01:46
 
I will post photos when the speakers are nearer to be complete. Anyway, I wonder how it is that I am surprised almost every time that I break in a driver. I seem not to learn that changes do occur, measurable or not. In this case, yes the treble has come about a bit better, and the midbass is admirable. I have not cranked them to see just how low they go, and will not for some time. Very little in the way of peakiness or shout. I am inclined to say that it just doesn't exist with these drivers. Just for fun, I have switched from the Rachael to a little digital amp (with a tube buffer before each of them), and that is a combination that is tough to beat. Don't think that all I will comment on will be positive, but so far, this is as good as any speaker that I have ever built with little play time.
If I were to compare these to the ZOB, then I would have to say that they sound like the ZOB with the rear switch in the soft position, and have a tighter sounding bass. More to come.
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Re: DNA W/Alpair 10  Build
Reply #8 - Yesterday at 22:56:20
 
Hey, more (and final) photos until spring. First, notice in the close up photo, that there is a liner/gasket on the perimeter of the driver. This came about for the fact that when the speaker manufacturer gave specs for the hole size to be routed, they don't mention that it is intended that the driver be mounted with an additional 'beauty ring'. Supposed to make things look a little nicer and have the company logo which is not on the driver itself, but no, I don't want it. So, I was left with the realization that the hole was a bit big. Went looking for a suitable gasket to make nice with the gap. Guess what, discovered that a new leather boot string was perfect.
 The cabinets are not finished, and will not be until the weather breaks. I must say that all the pieces of the cabinet do matter, as the bass seemed to be even lower with the addition of the bottom plate.
As to the sound of the speakers in general, the word best to describe them is nice. Yup, I could go into some sort of detail, but the sound is changing as time goes by, and I wait for the treble that the ZOB speakers have. Maybe that will not come. In the meantime, these speakers do not offend in any way, other than in the lack of treble. Let's give more time for break in as they have only been played 10-20 hours so far.

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4krow
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Re: DNA W/Alpair 10  Build
Reply #9 - Yesterday at 22:59:16
 
This is a after the gaskets were cut to size, and pinched into the gap. As usual, the flash photo exaggerates the detail.
 After viewing this photo on the site, let me emphasize that the cabinets will be trimmed! and finished for a much better look. Hard for me to even look at this photo with the dust on the cabinets, pieces of wood protruding here and there, and no finish.


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