Our DIY sound diffuser QRD 13 kit is based on prime number 13 so we have 12 wells, dividers,
rears, side pieces, back pieces, the horizontal dividers. The whole thing is designed so that
all you have to do is get some glue, the right kind of course, and assemble the unit. No
screwing required, everything is pre-cut for you. The back and the top and the bottom will
support the well dividers and the horizontal dividers. Let's get started looking at how
to put it all together. We're going to start with the back piece first and we're going
to place glue in each one of the wells and then position our dividers in there. In the
essence of saving time, we'll speed this process up. Carl actually doesn't go that fast but
we'll speed it up anyway. Here we're putting in the well dividers and they're designed
to stand on their own, gives you a little more flexibility if you're doing it yourself.
However, the next step where we're putting on the top and the bottom that Carl is going
up now, would be a good idea to have somebody to help you and get your tape out because
you're going to have to secure the units, the top and the bottom pieces with tape. So
you can see, one person it's a little bit of a struggle, trying to get everything lined
up. The glue doesn't dry really fast but you want to keep moving and not get drawn back
too far so you get another person to help you. Put a piece of tape to hold it all together
while the glue dries. Do the other section. Of course this one will go a lot easier because
it's already set in there for you. A little bit more tape. Now we're going to work with
the sides, same procedure. Put a little tape to hold it. Obviously those of you who that
have clamps could use clamps. Those work just as good. There's the sides. There's the finished
unit without the horizontal well dividers so each well now is 12 ½ inches deep. Now
we have to break them up into quarter wave length gaps and get the diffusion sequence
that we want out of our 13. To do that, we're going to use supporting blocks, the blocks
you cut to the right height so that when you prep the horizontal piece in the well, it
will be at that right height. Carl's working off the drawings that are provided with the
kit; inserting the block into the well width. Usually we do on these 4 fault ones, 3 blocks,
one on each end and one in the middle. Simply lay the horizontal piece in there. Let it
dry, of course, before you tilt it back up. Repeat the same procedure with the other wells.
We'll go to the other side and put those blocks in. I believe this first well is at a 1 inch
depth. That's the depth, we'll make that one. Over to the other side, because we all know
the quadratic diffusers, the sequence repeats itself to the middle and then starts over.
There you go, there's your two horizontal end wells completed and you just simply repeat
the process, following your drawing for all the other well depth. As you can see these
are lower. The other side obviously would be the mirror image of that. There's the completed
unit, with all the horizontal wells in there, all drying and gluing. There's your kit. You
can count the individual wells, make sure you've got everything there. Probably should
have done that in the beginning where we got all the pieces out of the kit but they're
there. These are the wells that are of different depths and you can see, we count through them
and follow your drawing and just double check to make sure you glued the box in the right
well and you have the right height and you should be real good to go. Put some clamps
on it if you have them. If not, leave the tape on them. I'd let it sit for a good 6-8
hours before I'd move it. It might be a good idea to keep it overnight too and not move
it, just try it and see. Don't get too excited. There's all the pieces for you and the assembly
process for the DIY QRD 13 sound diffuser.