Manufacturing of acoustic speakers to order. Manufacturing of custom-made acoustic systems. Coating with sound varnish. separate assembly stands

The team of the company "TRIUMPH AUDIOLAB" during its work on the development and creation of complex acoustic systems, has accumulated extensive experience in the manufacture of cases and structures acoustic design a wide variety of types.

Our carpentry production is equipped with modern equipment, and our specialists are highly qualified, which allows us to fulfill orders using almost all known materials and carpentry technologies. We work with MDF and chipboard, with solid wood, we use natural veneers and materials from ALPINA and BOOMANS, which, however, does not exclude the use of veneer produced by other companies, including Russian ones. MDF is mainly used by the German company HORNITEX, known for the stable quality of its products. Primers, paints and varnishes from SAYERLACK are mainly used as finishing materials. For finishing budget speakers, PVC film produced by such well-known companies as ROXAN, ALFATHERM, RENOLIT and HORNSCHUCH is used.

During the existence of carpentry production, we have tested many methods for manufacturing speaker cabinets, as a result, reliable technologies have been found to guarantee high quality products.

All this taken together allows us to offer you a wide variety of services for the manufacture and repair of speaker system components.
These services include:
1. Manufacturing of speaker enclosures of any complexity (bass reflex, horn, closed, transmission lines, band-pass, etc.), both for individual orders and for mass production according to your drawings and sketches.
2. Finishing of cabinets with natural veneer, PVC vinyl film or painting according to the RAL catalog.
3. Applying varnish to the speaker body, including coating the body with piano varnish.
4. Polishing speaker cabinets.
5. Repainting of speaker cabinets.
6. Various repairs of speaker housings: elimination of chips, cracks, scratches, dents, etc.
7. Changing the speaker cabinets (replacing one veneer with another).
8. Matching the color of speaker cabinets to the color of the interior details of your home, office or any other room.
9. Repair and production of grills for acoustic systems.
10. Manufacturing of height-adjustable spikes for stands for speaker cabinets.
11. Production of “DIY KIT`S” speaker cabinet designs for self-assembly.
12. Production of test one-time cases of experimental acoustics without finishing.
13. Manufacturing of anti-resonance stands for bookshelf and floor-standing speaker systems.

Acoustic system housings are made from MDF or chipboard sheets at the customer's request with a thickness of 16, 18, 22 or 24 mm. The internal volume of the speaker cabinet is filled with a sound absorber (SONOFIL SO/1/W or DAMPING MATERIAL) at the rate of 12...24 g per liter of internal volume. The strength of the speaker cabinet is increased through the use of proprietary anti-resonance technology based on the use of stiffeners or spacers. IN expensive models The speakers are additionally coated with a composite vibration absorber (PRITEX N28 or PRITEX N42) on the internal surfaces of the walls of the speaker housing. We use a high-pressure press to veneer almost all surfaces. Veneering is done using KLEIBERIT PVA glue (Germany). The finished parts of the speaker housing are finished and hermetically assembled.

We offer individuals and companies services for the development and production of speaker cabinets of any level, specialization and style.
We have experience in manufacturing cases with curved elements, as well as complex structures from solid plywood.
We accept orders from design studios for the implementation of complex designs of speakers and related products.

It is possible to complete the speaker enclosures with removable anthers, legs, spikes, terminals, bass-vector pipes, logos, etc.
All products are guaranteed.

Custom cases

To order a housing, a sketch, drawings or design description is required. Approximate prices are shown in the table. It is proposed to mount the heads from the outside (removable panels are possible, but reduce acoustic properties). It is possible to complete with removable anthers, legs, terminals, etc.

External finishing of the speaker cabinet (finish).

• finishing with PVC vinyl film (applied by vacuum method)
• natural veneer finishing
• painting the speaker housing in any color according to the RAL-K1 catalog
• application of varnish (number of layers)
• piano varnish coating: increases production time by 8 weeks.
• tinting natural veneer
• oak veneer bleaching
• polishing: increases production time by 1 week.

Before a detailed consideration of the problem, we will outline the range of tasks; knowing the final goal, it will be easier to choose the right direction. Making speaker systems with your own hands is a rare occurrence. Practiced by professionals and novice musicians when store-bought options are not satisfactory. The problem arises of integrating into furniture or high-quality listening to existing media. These are typical examples that can be solved using a set of generally accepted methods. We'll take a look at it. We do not recommend scrolling diagonally through the speaker system, delve into it!

Acoustic system design

There is no chance of making an acoustic system yourself without understanding the theory. Music lovers should know that the biological species Homo Sapiens hears sound vibrations with frequencies of 16-20,000 Hz through the inner ear. When it comes to classical masterpieces, the variation is high. The lower edge is 40 Hz, the upper edge is 20,000 Hz (20 kHz). The physical meaning of this fact is that not all speakers are capable of reproducing the full spectrum at once. Relatively slow frequencies are better handled by massive subwoofers, and squeaking at the lower edge is reproduced by smaller speakers. Obviously, this means nothing to most people. And even if part of the signal disappears or is not reproduced, no one will notice it.

We believe that those who set the goal self-production sound system, must evaluate the sound critically. It will be useful to know that a suitable speaker has two or more speakers in order to be able to reflect the sound of a wide swath of the audible spectrum. But even in complex systems there is only one subwoofer. This is due to the fact that low frequencies cause the environment to vibrate, even penetrating through walls. It becomes unclear where exactly the bass is coming from. Consequently, there is only one low-frequency speaker – a subwoofer. But as for other things, a person will confidently say from which direction this or that special effect came (the ultrasound beam is blocked by the palm).

In connection with the above, we will divide the acoustic systems:

1. Sound in Mono format is unpopular, so we avoid touching on historical excursions.
2. Stereo sound is provided by two channels. Both contain low and high frequencies. Equal speakers equipped with a pair of speakers (bass and squeak) are better suited.
3. Surround Sound is distinguished by the presence of a larger number of channels, creating a surround sound effect. We avoid getting carried away with subtleties; traditionally, 5 speakers plus a subwoofer convey the range to music lovers. The design is varied. Research is still underway to improve the quality of acoustic transmission. The traditional arrangement is as follows: in the four corners of the room (roughly speaking) there is a speaker, the subwoofer is on the floor to the left or in the center, the front speaker is placed under the TV. The latter is in any case equipped with two or more speakers.

It is important to create the correct enclosure for each speaker. Low frequencies will require a wooden resonator, but for the upper end of the range it doesn’t matter. In the first case, the sides of the box serve as additional emitters. Find a video demonstrating dimensions, corresponding to wavelengths low frequencies According to science, all that remains is to practically copy ready-made designs; the topic is devoid of relevant literature.

The range of tasks is outlined, readers understand that a homemade acoustic system is built with the following elements:

• a set of frequency speakers according to the number of channels;
• plywood, veneer, body boards;
• decorative elements, paint, varnish, stain.

Acoustics design

Initially, select the number of columns, type, location. Obviously, producing more channels than a home theater has is an unwise tactical move. A cassette recorder will only need two speakers. At least six buildings will be released for the home theater (there will be more speakers). According to the needs, accessories are built into the furniture, the quality of low frequency reproduction is poor. Now the question of choosing speakers: in the publication by Naidenko and Karpov the nomenclature is given:

1. Low frequencies - CA21RE (H397) head with an 8-inch fit.
2. Mid range - MP14RCY/P (H522) 5" head.
3. High frequencies – head 27TDC (H1149) by 27 mm.

Brought basic principles designing acoustic systems, offered electrical diagram a filter that cuts the flow into two parts (a list of three subranges is given above), the name was given purchased speakers solving the problem of creating two stereo speakers. We avoid repetition; readers can take the trouble to look through the section and find specific titles.

The next question will be the filter. We believe that National Semiconductor will not be offended if we screenshot the drawing of the Ridico translation amplifier. The figure shows an active filter with a power supply of +15, -15 volts, 5 of the same type of microcircuits (operational amplifiers), cutoff frequency subranges are calculated by the formula shown in the image (duplicate in text):

P – number Pi, known to schoolchildren (3.14); R, C – resistor and capacitance values. In the figure, R = 24 kOhm, C is silent.

Active filter powered by electric current

Taking into account the capabilities of the selected speakers, the reader will be able to select a parameter. The characteristics of the speaker's playback band are taken, the overlap junction between them is found, and the cutoff frequency is placed there. Thanks to the formula, we calculate the value of the capacitance. Avoid touching the resistance value, reason: it can (disputed fact) set the operating point of the amplifier, the transmission coefficient. On frequency response given in the translation, which we omit, the limit is 1 kHz. Let's calculate the capacity of the specified case:

C = 1/2P Rf = 1/2 x 3.14 x 24000 x 1000 = 6.6 pF.

It’s not that big of a capacitance; it’s selected based on the maximum permissible voltage. In a circuit with sources of +15 and -15 V, it is unlikely that the nominal value exceeds the total level (30 volts), take a breakdown voltage (the reference book will help) of at least 50 volts. Do not try to install DC electrolytic capacitors; the circuit has a chance of blowing up. There is no point in looking for the original circuit diagram of the LM833 chip due to Sisyphean labor. Some readers will find a replacement chip that is different... we hope for your understanding.

Regarding the relatively small capacitance of the capacitors (retail and total), the description of the filter says: due to the low impedance of the heads without active components, the ratings would have to be increased. Naturally causing the appearance of distortions due to the presence of electrolytic capacitors and coils with a ferromagnetic core. Feel free to move the range division boundary, general throughput remains the same.

Passive filters will be assembled with your own hands by anyone trained in soldering in a school physics course. As a last resort, enlist the help of Gonorovsky; there is no better description of the intricacies of the passage of signals through radio-electronic lines that have nonlinear properties. The presented material interested the authors in low and high frequency filters. Those wishing to divide the signal into three parts should read works that reveal the basis of bandpass filters. The maximum permissible (or breakdown) voltage will be scanty, the nominal value will become significant. Matching the mentioned electrolytic capacitors are capacitances with a nominal value of tens of microfarads (three orders of magnitude higher than those used by an active filter).

Beginners are concerned about the issue of obtaining a voltage of +15, -15 V to power speaker systems. Wind a transformer (an example was given, PC program Trans50Hz), equip it with a full-wave rectifier (diode bridge), filter, enjoy. Finally, active or passive filter buy it. This thing is called a crossover, carefully select the speakers, correlate the ranges more accurately with the filter parameters.

For passive speaker crossovers, you will find many calculators on the Internet (http://ccs.exl.info/calc_cr.html). The calculation program takes the input impedances of the speakers and the division frequency as the initial numbers. Enter the data, the robot program will quickly provide the values ​​of capacitances and inductances. On the page below, specify the filter type (Bessel, Butterworth, Linkwitz-Riley). In our opinion, this is a task for the pros. The above active stage is formed by 2nd order Butterworth filters (rate of frequency response reduction 12 dB per octave). It concerns the frequency response (frequency response) of the system, understandable only to professionals. When in doubt, choose the middle ground. Literally check the third circle (Bessel).

Acoustics of computer speakers

I happened to watch a video on YouTube: a young man announced that he would make an acoustic system with his own hands. The talented boy: he ruined the speakers personal computer- well, none at all - I brought out an amplifier with a regulator and placed it in a matchbox (speaker system housing). Computer speakers are notorious for poor bass response. The devices themselves are small, light, and secondly, the bourgeoisie saves on materials. Where does bass come from in a speaker system? The young man took... read on!

Most expensive component music center. Hi-end acoustics cost less than a cheap apartment. Repairing and assembling speakers is a good business.

The low-frequency amplifier of the speaker system will be assembled by an advanced radio amateur; no Kulibins are needed. The volume control knob sticks out of the matchbox, the input is on one side, the output is on the other. The speakers of the old sound system are small. The young man got hold of an old loudspeaker, not of fabulous size, but solid. From a Soviet-era speaker system.

To prevent the sound from disturbing the air with squeaking, the clever youth nailed together one-inch boards into a box. The speaker of the old acoustic system was placed in the size of a mailbox, moved, as is done by the manufacturers of modern home theater subwoofers. I was too lazy to decorate the inside of the speaker with soundproofing. Anyone can use batting or other similar material for the acoustic system. Small speakers are placed inside oblong boxes that just contain the end of a loudspeaker. The proud youth connected one channel of the speaker system to two small speakers, the second to one large one. Works.

The young man is a fabulous fellow, he doesn’t drink in the gateway, like his peers, he doesn’t spoil future brides in his free time, he’s busy with business. As one acquaintance said: “The younger generation is forgiven for a lack of knowledge and experience, not an excess of arrogance, strengthened by indifference.”

Improvements

We decided to improve the method; we sincerely hope that the addition will help make the acoustic system itself somewhat better. Problem? The concept was invented by radio engineers and creators of acoustic systems - frequency. The vibration of the Universe has a frequency. They say that it is even inherent in a person’s aura. It’s not for nothing that every good speaker can accommodate several speakers. Large ones are for low frequencies, bass; others - for medium and high. Not only the size, but also their structure is different. We have already discussed this issue and refer those interested to the written reviews, which provide a classification of acoustic systems and reveal the operating principles of the most popular ones.

Computer scientists know the system buzzer, which operates via a BIOS interrupt, which seems to be capable of producing one sound, but talented programmers wrote elaborate melodies on it, even with an attempt at digital synthesis and voice reproduction. However, such a tweeter cannot produce bass if desired.

Why this conversation... A large speaker should not just be adapted to one of the channels, but should be given a specialization for bass. As you know, most modern compositions (We don’t take Sound Around) are designed for two channels (stereo playback). It turns out that two identical speakers (small) play the same notes, this makes little sense. At the same time, from the same channel, the bass is lost, and the high frequencies die on a large speaker. What should I do? We propose to introduce passive bandpass filters into the circuit, which will help split the flow into two parts. We take the diagram from a foreign publication for the simple reason that it was the first one that caught our eye. Here is a link to the original site chegdomyn.narod.ru. The radio amateur copied it from the book, we apologize to the author for not indicating the original source. This happens for the simple reason that he is unknown to us.

So, here's the picture. The words Woofer and Tweeter immediately catch your eye. As you might guess, this is, respectively, a subwoofer for low frequencies and a speaker for high frequencies. The range of musical works is covered from 50-20000 Hz, with the subwoofer accounting for the low frequency band. Radio amateurs themselves can calculate the bandwidth using well-known formulas; for comparison, A of the first octave, as is known, is 440 Hz. We believe that such a division is suitable for our case. I would just like to find two large speakers, one for each channel. Let's look at the diagram...

Not exactly a musical scheme. In the position occupied by the system, the voice is filtered. Range 300-3000 Hz. The switch is signed Narrow, translated as a stripe. To get Wide playback, lower the terminals. Music fans can throw out bandpass filter Narrow, we recommend that those who like to surf Skype avoid hasty decisions. The circuit will completely eliminate the microphone loop effect, which is known everywhere: a high-pitched buzz due to over-amplification (positive feedback). A valuable effect, even a military man knows the difficulties of using a speakerphone. The owner of the laptop is aware...

To eliminate the feedback effect, study the issue, find at what frequency the system resonates, cut off the excess with a filter. Very comfortably. Regarding popular music, we turn off the microphone, move it away from the speakers (in the case of karaoke), and start singing. We will leave the high and low pass filters unchanged, the products were calculated by unknown Western friends. For those who have difficulty reading foreign drawings, we explain that the diagram depicts (the Narrow bandpass filter is discarded):

1. Capacitance 4 µF.
2. Non-inductive resistances R1, R2 with a nominal value of 2.4 Ohm, 20 Ohm.
3. Inductance (coil) 0.27 mH.
4. Resistance R3 8 Ohms.
5. Capacitor C4 17 uF.

The speakers must match. Advice from this site. The subwoofer will be MSM 1853, the tweeter (the word has not been written off) will be PE 270-175. You can calculate the bandwidth yourself. The capital letter Ω means kOhm - no big deal, change the value. We remind you that the capacitances of parallel-connected capacitors add up, like series-connected resistors. In case it is difficult to get suitable denominations. It is unlikely that you will be able to make speakers with your own hands; it is realistic to obtain small resistance values. Do not use coils; we cut out plates of nichrome or similar alloys. After manufacturing, the resistor is varnished; high current is not planned; the element should not be protected.

It is easier to wind the inductors yourself. It is logical to use an online calculator, by setting the capacitance, we will get the parameters: number of turns, diameter, core material, core thickness. Let's give an example, avoiding being unfounded. We visit Yandex, type something like “online inductance calculator”. We receive a number of output responses. We choose the site we like, and begin to think about how to wind the inductance of an acoustic system with a nominal value of 0.27 mH. We liked the site coil32.narod.ru, let's get started.

Initial information: inductance 0.27 mH, frame diameter 15 mm, PEL wire 0.2, winding length 40 millimeters.

The question immediately arises, seeing the calculator, where to get the nominal diameter of the insulated wire... We worked hard, found a table on the website servomotors.ru, taken from the reference book, which we present in the review, consider it for your health. The diameter of the copper is 0.2 mm, the insulated core is 0.225 mm. Feel free to feed the values ​​to the calculator, calculating the required values.

The result was a two-layer coil with 226 turns. The length of the wire was 10.88 meters with a resistance of about 6 ohms. The main parameters have been found, we begin to wind. The homemade speaker system is made in a hand-made housing; there is room to attach a filter. We connect a tweeter to one output, and a subwoofer to the other. A few words about amplification. It may happen that the amplifier stage will not support four speakers. Each circuit is characterized by a certain load capacity; you cannot jump higher. The speaker system is designed with a fixed headroom in mind; to match the load, an emitter follower is often used. The cascade that makes the circuit work, full impact on any speaker.

Parting words for beginning designers

We believe that we have helped readers understand how to properly design an acoustic system. Passive elements (capacitors, resistors, inductors) can be obtained and manufactured by anyone. All that remains is to assemble the speaker system body with your own hands. And we believe that this will not be the case. It is important to understand that music is formed by a range of frequencies that are cut off by improper manufacturing of the device. When you are planning to make a speaker system, think about it and look for the components. It is important to convey the magnificence of the melody, there will be a strong confidence: the work was not in vain. The speaker system will last a long time and will give you joy.

We believe that readers will enjoy making speaker systems with their own hands. The coming time is unique. Believe me, at the beginning of the 20th century it was impossible to obtain tons of information every day. Training resulted in hard, painstaking work. I had to rummage through the dusty shelves of libraries. Enjoy the Internet. Stradivarius impregnated the wood of his violins with a unique composition. Modern violinists continue to choose Italian examples. Think about it, 30 years have passed, the cart has been left behind.

The current generation knows the brands of adhesives and the names of materials. Necessities are sold in stores. The USSR took away the abundance of people, providing them with relative stability. Today, advantage is described by the ability to invent unique ways to earn money. A self-taught professional will cut down cabbages everywhere.

Slonov Sound Design company produces custom-made speaker systems since 2005.

During this time, several systems developed according to individual projects of the company’s clients have been implemented. Each completed project was not just another sound reproduction system, but a real work of art, born from a combination of the efforts of their creator and the discerning taste of the customer. Thus, ordered speaker system was a unique embodiment of each client's personal preferences in music, acoustics and design!

And yet, why is it better to make custom-made acoustics rather than buy ready-made ones? And why does the number of buyers using the “service” increase from year to year?

There are several answers. Firstly, for the same reason why you need to sew a suit to order. Men who wear suits have too different body types and too different ideas about the ideal suit. Likewise, music lovers have different preferences and ideas about ideal sound. Secondly, the aesthetic aspect: by purchasing acoustics created according to an individual project, the customer receives a system that not only reproduces audio recordings as realistically as possible, but also looks exactly the way he would like it, while organically fitting into his interior, becoming an integral part of the stylish homely atmosphere! Thirdly, if we talk specifically about Slonov Sound Design systems, then the complexity of the technology for manufacturing speaker cabinets and the principle used active filtration exclude mass production similar systems and imply joint development with the customer of the concept of the future system and its voice.

In the last two or three years, there has been an inevitable decline in the fashionable hobby for home theaters and a return of interest in classic stereo, and the spread of high-resolution sound recordings (96kHz/24 and 192kHz/24) and technology for their playback will undoubtedly give it new impetus. Progress does not stand still, but no matter how the audio industry develops, having a home Hi-End acoustics, which gives the opportunity to enjoy a lively and authentic sound, was and remains not so much an indicator of the wealth and status of its owner, but rather of his enlightenment, cultural level and true passion for music, which does not allow him to be content with a sound that is far from the original.

That is why the Slonov Sound Design company, creating custom speaker systems, considers its mission not only to satisfy customer needs for high-quality sound, but also the individualization of home speaker systems.

Everyone comes to the need to create their own acoustic system for various reasons: hobbies, search for a unique sound, commercial purposes. During the existence of the Deluxe Acoustics company, we have repeatedly assisted people in the manufacture of various cabinets and other wooden products of a musical nature.

We have at our disposal a CNC milling machine and other carpentry equipment that is necessary for the manufacture of speaker cabinets High Quality. We work primarily with MDF and plywood, but if the client prefers other materials, then it’s just a matter of price.

The main question is, how much does it cost?

The most expensive stage in the manufacture of a speaker system body is, of course, finishing. The more demands are placed on it, the faster the total amount grows. In our opinion, for an acoustic system, sound should still come first. When the budget allows you to make something beautiful too appearance– great, but otherwise try to find a compromise.

If you arrange the finishing options in descending order of price, you get the following sequence: veneering, painting, covering with Tolex/film. In order to ensure good results, we cooperate with third-party specialists whose quality of work is time-tested; We can paint bookshelf acoustics ourselves.

Thick books have been written on the theory of acoustics, and there are many valuable observations and opinions on specialized audio forums. In order for our cooperation to be most productive, it is worth immediately determining what is required from the contractor (that is, us, Deluxe Acoustics): design and discussions or work according to a clearly defined technical specification, which begins with a detailed and accurate drawing. Let's not hide it, we are more interested in the second option J

How much will it cost to make my case with dimensions “x” “y” “z”?

Before telling the exact price, it is necessary to make a so-called “vector” drawing on a computer on a 1:1 scale, taking into account all the selections for speakers, stiffeners, labyrinth elements and other nuances agreed with the customer. Drawing up a drawing is a paid procedure and is included in the cost of the order; accurate sketches are welcome. Depending on the complexity of production, the price of a “box” of the same size may differ by several orders of magnitude. Simplifying as much as possible, we can say that one case of a floor-standing system costs about 10-15 tr, and a shelf-type system costs 5-8 tr.

Why so expensive?!

When producing enclosures of one project in series, the cost is reduced. In our case, we are talking about individual orders with all the ensuing consequences. We do not make unnecessary surcharges, our cost is a combination following parameters: prices for materials, preparation of drawings, working time spent on assembly/finishing. If you want to significantly reduce the price, then the simplest option is self-assembly and finishing of CNC cut panels.

We will spare you colorful epithets describing the accuracy of our equipment and the level of qualification of our specialists: if you have sketches, we definitely have something to offer you