Acoustic system on speakers Visaton

We make the speaker system ourselves using Visaton speakers.

The task is simple only at first glance, difficult to execute in all its manifestations, but the desire to create not a consumer goods version of Chinese production, but a high-quality real Hi-fi at the same time on not expensive dynamic heads. The choice fell on the company Visaton, these are affordable German speakers with the ability to buy in Moscow.

1. My goal is to create rear speakers for DK (home theater), but structurally they can be used with 100% guarantee, and as small fronts for other multimedia needs. These will be 2-way speakers with a frequency response of 45Hz-20.5KHz and a cutoff frequency of 3300Hz ( MF LF) and 3000Hz (HF).
2. The crossover will be based on inexpensive metal-film capacitors, inductors and resistors from Jantzen Audio. All this will be placed on the printed circuit board.
3. Plywood 18mm thick was used as the material of the boxes. The overall dimensions of the column are 396x216x236mm. (HxWxD), volume 13 liters, weight of the assembled column 6 kg.
4. I will use Titebond Original Wood Glue, I recommend.
5. To calculate the box, I will use the BassBox 6 Pro program
6. To calculate the crossover, I will use the X over 3 Pro program
7. I use speakers W 130 S 4 OHM (midrange / bass) and SC 10 N / 8 OHM (treble)
8. Bass reflex tube Intertechnik BR SL 45
9. Fasteners for protective nets Intertechnik RH 6
10. Acoustic fabric Audiomania 101-14 (black)

By the way, you can see that the speaker cone W 130 S 4 OHM is shiny, it is impregnated paper, here the impregnation also glitters, but only from the front side. In the photo there are boxes, so they are sold.

Rushed

I make templates for spacers and protective nets from fiberboard (hardboard) in advance.

I buy plywood and saw off the parts according to the drawings, I sawed with a hand-held circular saw, it goes perfectly smoothly along the tire, and the disc has 36 teeth so that there are no plywood chips when cutting.

Sawed wood – future blanks for the speaker cabinet.

And he milled the grooves in the parts to connect to each other.

Checking the joints of the parts of the boxes.

I mill the holes for the speakers and the terminal. Homemade router compass, also made of plywood. I do not milling until the end, so it is more convenient for me and the table is intact and the surface of the board is preserved for milling other holes, and then I cut off the “pancake” with a jigsaw in the center of the milled groove and finish the work with a milling cutter using a copy cutter.

I glue each wall in stages, but I assemble the column completely, even for the sake of one wall.

I use window glazing bead as additional stiffeners.

Then I glue it inside with batting. Pre-sliced. In addition to the batting in the boxes in the upper part, above the spacer, I pushed a piece of synthetic rubber. But this is when the column is fully assembled.

The phase inverter tube is too long, I cut off the excess on a lathe, this way the accuracy of the cut is maintained, the FI is set to 45Hz.

When the box is glued, I process the edges flush with a router using a copy cutter with an upper bearing, and then level them with a grinder to finish, and also round off the front edges.

By the way, as you can see in the photo, I put pieces of plywood under the legs of the clamp in order not to tear, split the material of the box.

The box is ready, I glue it over with a self-adhesive film imitating the structure of a tree, in this case mahogany…

Using a hair dryer and a rubber roller, both glue and bend the edges of the film, then I cut the film with a clerical knife.

After cutting off the excess pieces of skin, I sand the edges with 360 grain sandpaper.

As legs, paws I will use protectors for furniture 51 rubles for 12 pieces, that’s more than enough. Backing material with glued felt.

I make protective nets, material is plywood 14 mm. I saw with a jigsaw using a shape saw file.

I sawed everything crooked and obliquely and the workpiece was 2 mm larger, that’s how it should be, for this workpiece I glue the same template on double-sided tape, and I process it with a copy cutter on the router.

The part has become a copy of the template, the cutter is then-copying.

I paint the lattice (skeleton) with a black permanent marker so that the material does not shine through the acoustic fabric. I pull the fabric, pull it, lace it, as in the photo, achieving maximum tension, so that the fabric does not “play”.

Now I fix the fabric with glue from a syringe, when the glue dries, I cut off the fabric with a soldering iron, since it is solid synthetic and can be cut off easily.

I drive in the holders of the mesh.

In a protective net.

And into the boxes themselves.

I used terminals of an unknown company, bought at the Mitino radio market in Moscow. I milled a Ø49mm hole for them. and for flange Ø75mm.

The hardest part of all the work is the crossover.

The calculation and testing of the crossover took place within 1 month and this is not the longest time.

For the crossover, I make boards, the parts are glued to the board with silicone glue (sealant) so that there is no bounce inside. I wait for the glue to dry, bite off the extra legs and solder the radioelements, sparing no solder. I puddle the solder on the tracks, thereby increasing the permissible current.

I install the board in the column on wooden racks that are glued. Racks height 5 mm, diameter 15 mm, turned on a lathe.

Crossover circuit

In conclusion, I will note that the work done, I am satisfied not because I did it and it means a panacea, no, this is a subjective opinion, after listening, removing the frequency response, I realized that I created excellent speakers that deserved a pleasant mention of them, soundly, efficiently and with soul, Q.E.D. When removing the frequency response, do not fight for its linearity to the point of pardon (stupidity), you need to trust their own ears, they have their own frequency response, and you, by tuning the crossover, will find that octave, a note that will match the speakers <=> ears in this and the sound is beautiful, it is multifaceted.