How and from what to make an acoustic column with your own hands?

Built into the low-power amplifier gadget with “sakes” is not enough. Sometimes you want from the “smartphone” sound much more. For this, we need speakers with an amplifier. And how and from what to make an acoustic column with your own hands?

Column device

The simplest floor column is a box or a box in which one broadband or several narrowband speakers are located. One dynamics of the separation filter will not need. Two or more – agree on the spectrum (subband) of sound frequencies. To improve the return at low frequencies in the column, a phase inverter is provided – a round-cross-section channel in which the lowest frequencies are transmitted.

In addition to speakers, separation filter and phase inverter, the active column contains an amplifier and power supply for it, placed in the closed compartment in the rear.

One of the stereoolonok is active (there is an amplifier, a power supply and an output for another column). Second – passive (led). Instead of a disconnected cord, Bluetooth wireless communication is organized between the speakers – it allows you to make a column in any corner of the room, without stretching the wire between it and the second.

Portable columns, except Bluetooth communication, are equipped with a data reader from flash drives and memory cards, the simplest FM receiver with scanning setting, LED tape with a color music (or a matrix with a running string) and a number of other functions. Often they are equipped with a carrying handle.

What can be done?

At home, the column body is made almost from anything. Go to move:

  • Corpus from the failed automagnetic;
  • The housing from the luminous cube in which the backlight burned;
  • The “egg” column is made of paper, carved in a plurality of layers and impregnated with glue (for example, epoxy);
  • Remains of laminate or parquet – after the gender permit;
  • Chipboard, MDF material, fiberboard, natural tree;
  • For portable columns, PVC pipe (or polypropylene) largest diameter is suitable – it seems that they are used in carrying out an inter-storey drain channel for the bathrooms of the whole house;
  • Plywood – when it is cutting, keep care: it easily gives chips and cracks, with time bent.

    Deciding with the carrier case material, take care of the rest of the details and consumables.

    What will be needed for manufacture?

    In addition to the material from which the housing is manufactured, for the active column you need:

    • one broadband, or 2-3 more narrowband dynamics;
    • Ready or homemade power supply;
    • Ready or homemade sound frequency power amplifier;
    • conventional wire or cable;
    • winding wire;
    • plastic tube suitable diameter;
    • rosin, solder and solder flux;
    • glue-sealant;
    • Epoxy glue or furniture corners.

      From the tools you need:

      • Passatia;
      • boxes;
      • Flat and curly screwdriver (the set of screwdriver is best);
      • wood hacksaw;
      • Fire or chisel;
      • Hand drill and set roller.

      To accelerate the work, use the power tools: an electric door, a grinder (we need cutting and grinding wheels on wood), screwdriver and electric bison.

        Functions of the drill performs and screwdriver included in high revs.

        Stages of work on the creation

        For making with your own hands, a rectangular or cubic speaker will be required to make the body (drawer) correctly, in which the electronics is located. To make a housing, focus on the drawing.

        1. Mark and saw the board (can be from sawn timber) on the prefabrices, of which the case is going to.
        2. In the front wall for speakers (and phase inverter if the design provides for this) drill around the hole circles. Select a removable fragment from the drilled chalkboard, edges to handle with a file or a grinder. Insert the speakers (and a piece of the phase inverter pipe) to check how exactly they will be located there.
        3. Screw the speakers for their landing loop to the front face. Insert a piece of pipe instead of a phase inverter. Seat all the slots using the sealant or “Moment-1”.
        4. Collect the main part of the box: top, bottom, side and rear faces Connect with each other with epoxy glue or corners. In the case of use of the corners of the slot, it is recommended to sealed with sealant or plasticine. Some perform sealing with the help of “Moment-1” or epoxy glue – in the latter case, the column will be “unthizable”.
        5. Perform steps 1-4 for the second column. It is more convenient and faster to make both corps in the same days.
        6. When the main body is ready, cut the seventh fragment of the case – The inner wall, a fitting power supply and an amplifier from acoustic (sound) compartment. The fact is that the reasancement of sound from the abundance of sharp edges of the details worsens the work of the column at low frequencies. For the casing of the second column, the partition will not be required – it is passive and does not require the power supply. An option is possible when instead of a single stereoxeller in each of the speakers is used its mono amplifier. Place a shared (powerful) power supply in one of the columns or lead to each of them (less powerful) – to solve you.

        Manufacturing of the case completed. To mount the electronic component, do the following.

        1. Attach the amplifier and power supply on the inner partition.
        2. Connect the power supply and amplifier to each other – the power will be supplied to the input by the amplifier power supply.
        3. Connect the speaker (if one) to one of the outputs of the amplifier. For the second (passive column), drill the hole under the audio, connect this connector to the second stereo channel channel.
        4. Drill a hole for the input audio in the rear wall, connect the connector inserted into it to the input of the amplifier.
        5. Cut the connector in the back wall to power 220 volts, mounted this connector in it. Connect the power connector to the power supply of the power supply.
        6. Inseulate all soldering connections using sealant, thermoclause, scotch or tape.
        7. If the speakers are somewhat – the coils of the separation filter and additional capacitors forming the first oscillatory circuits. Three-band columns using the filter clearly distinguish high, medium and low frequencies for different speakers.

        To make a separation filter, do the following.

        1. Sill from the plastic pipe of the desired diameter a couple of pieces. It is impossible to use a metal-plastic pipe – it will turn the coil into the source of the electromagnetic field, besides, it will also require recalculation and additional measurements of inductance on a special multimeter.
        2. Cut and dust out the side face For coils.
        3. “Sand” pieces of pipes in bonding places. Glue coil frames using thermocons, “moment-1” or epoxy glue. Wait until the glue dries and curses.
        4. Focusing on the description of the column scheme, Machine the desired number of turns of the enamel of the corresponding diameter.
        5. Mount the coils on the partition or the posterior wall of the column. They are fixed both with the help of a plug-in, and through self-tapping screws with washers (each coil is held in three points for one of the faces). Central fastening is allowed using self-pressing or bolt with a plastic / metal washer, greater than the external diameter of the pipe. Such washers are used for the suspension of household appliances and cabinets on the walls using through studs.
        6. Connect the coils to condensers – according to the scheme in the description. Must get a full-fledged strip filter.

        Filter function – highlighting the upper, middle and lower frequencies: accordingly, “satellites”, “satellites” and sabwofer speaker.

        It provides sound naturalness. The number of filters – for high, medium and low frequencies can be equal to the number of speakers (or the number of speakers in the minus one column, depending on the scheme).

        From paper

        A column from ordinary paper is not as simple as it seems. It will be necessary glue containing a hardener – layers of paper are impregnated. It is best for this with epoxy – from it often make coils and printed circuit boards (the material resembles Getinax). Make the following.

        1. For a square column on the template of each of the walls, mark and cut the sheets of paper. In the sheets from which the front line of the column sticks, cut the holes under the speakers and the output of the phase inverter. For the back – holes for audio sequins and nutrition nest.
        2. Divide and apply a little epoxy glue on sheets that serve as the first layer. Glue two layers for each of the walls and leave them dry.
        3. The next day, glue for each of the walls of the third layers. Adjust one every day. The interval between stages can be reduced from one day to several hours to speed up the process. But in this case, the quality may suffer. Repeat these actions until the thickness of the walls of the future column reaches at least 1.5 cm. Instead of paper you can use a dense cardboard.

        As soon as the column walls are ready, mounted and connect the speakers and other parts according to one of the above instructions.

        The disadvantage is important and accuracy when gluing sheets, otherwise the design will lead to the side. The advantage of the method is the use of paper from old logs and newspapers, cardboard (except wavy, with voids inside).

        Round case will speed up the process: a piece of paper is wound on a piece of pipe with a wide lumen, soaked in motion. Secure Scotch the initial winding line. The development is interesting in which the role of a sound coil performs a strip of metal foil, the role of the diffuser – a sheet of paper. Make the following.

        1. On a sheet of paper, make metal tape or double-sided tape with foil. Turns place so that they do not come into contact.
        2. Print the ends of the tape or foil to the sound source.
        3. Place a magnet under the paper sheet, connect the gadget and turn on the music.

        Large volume you will not get – the amplifier in the gadget is too small in power. Middle and low frequencies to the “squeezing” sound will be added. In powerful columns, a multilayer design is used – electrostatic membrane designed for high power amplifier.

        From the tire

        The column made of tires will not compare as agreed and amplitude-frequency response with branded or homemade rectangular systems. The stiffness of the walls is insufficient – rubber and ebonite are devastating low frequencies due to excessive elasticity. Music stereo system need a big speaker – it should be fixed in the tire in diameter, but do not fall inside. The other side of the tire is closed with plywood or white lumber board, placing the power supply and amplifier on it.

        The tire itself should not contain samples, holes – but surface cracks do not affect sound quality.

        A more advanced design will be a design, some of which from the side of the dynamics is closed with a wooden ring, discharged from the same plywood itself. The speaker is fixed not on the tire itself, but on the plywood ring, which can be connected to the rear, where the deaf wall of plywood is located, using long through self-tapping screws or bolts. Such a column can be rolled on the road. But it contains only one speaker, t. To. Place two or more difficult in flat and limited space. Amplifier, power supply and filters are placed on the back wall.

        From banks Pringles

        The simplest, but unusual option – aluminum, cardboard, plastic banks and glasses are used as a column, making a slot and inserting a smartphone in them. More “advanced” – put in a jar from the chips or a glass suitable for the diameter of the speaker. The principle of any such column is based on the fact that the sound, reattaching from the walls, acquires an additional volume. But without an amplifier and a high-quality speaker of a good and bright, beautiful sound you will not get. Production of the speaker, the speaker of which is directed up, from the bank from PRINGLES chips similarly to any design, as a housing of which the PVC pipe is used for sewage.

        From the bottle

        It will suit any plastic or glass bottle. Plastic cut and drill safer. For glass, diamond rods and crown will be required, and the process itself is performed under water. Make the following.

        1. Drill in a bottle with a crown hole under the speaker.
        2. Remove the mounting holes for the self-tapping screw. The phase inverter will serve or open neck, or additionally drilled by the diameter of the core hole under a piece of plastic pipe.
        3. Pour the sealant into the holes, set the speaker with the solder wires in advance. Tighten the screws. “Dry” in the glass to screw them, it is impossible – the bottle will crack and split into parts.

        Do not use bottles of tempered glass – it is not to be processed and immediately break into small cubic fragments with dull edges.

        From headphones

        Headphone column is an option in which instead of a dynamic head that is not calculated for a decent volume on a large distance of a distance, any modern speaker is used. Headphone space is sharply limited to accommodate the amplifier and the feeding battery. This column uses a piece of all the same PVC pipe. However, when the column is passive, the process is significantly accelerated. Step-by-step instructions lies in the following.

        1. Disassemble the headphones and remove the heads with membranes.
        2. Insert the speakers on their place. Speaker as possible is chosen thin and flat.
        3. Connect the wires for the previously suspended high-frequency voltage to membrane heads.
        4. Secure the speakers using self-samples.
        5. Close (if it turns out) grid inserts.

        Turn headphones in the column is possible if they were originally large enough – the ears were completely closed. If the speakers are not inserted completely, do not close, then use the equivalent replacement that is manufactured as follows.

        1. Remove membrane heads from headphones.
        2. Slim in the bottom of a plastic or cardboard glass of holes, slightly smaller heads themselves in diameter.
        3. Insert and glue membranes.

        This option is very easy to manufacture. Disadvantage – sound volume no more than 30 decibels. Such a sound is comparable to a radio button, it is used in rooms where noise is small.

        Such acoustics refers more to comic – it is not designed for professional use. For full speakers need speakers. If you insert small-sized speakers instead of headphone membranes failed, The cylindrical design is already familiar to you as the basis.

        1. On the back of the headphones, ride a hole in which the magnet will enter the back of the speaker. The hole must be much larger than the magnet itself – only the side carrier design will remain from the headphone housing. Rear (outer) Headphone wall will be cut entirely.
        2. Enclose with a thermoclaus or “Moment-1” Headphone just made a cut piece of PVC pipe.
        3. Place inside the pipe power supply (or lithium-ion battery with a recharge controller) and the amplifier itself. Active column will be obtained.
        4. Similarly, make the basis for another earphone, place the speaker in it. It turns out a passive column. In stereosisms active is only one of the columns.
        5. Output audio accounts from passive column, Squash a plug with a standard 3.5 mm diameter.
        6. Cut into the active column the same connector for connecting passive. Connect one of the stereo modes of the amplifier to it. The second – to the dynamics of the active column directly.
        7. Cut another connector in the active column – To connect an external sound source (for example, a smartphone), connect it to the stereput of the amplifier.
        8. Connect the power supply To the entrance for it on the amplifier.
        9. Check that all parts and nodes are securely fixed, Close both columns using a plug.

        If the columns are powered by the battery – instead of the power supply, connect the battery to the discharge controller, and the controller itself is to the outputs of the amplifier power. Connect the charge controller to the battery, having embarked on its connector into the round walls of the active column. If you need a wireless connection – purchase and install Bluetooth audiolate in the active column.

        Useful recommendations

        • Before finally collect columns, Test their work, namely – sound quality. It must coincide with the settlement. Make an acoustic calculation of the room.
        • Soldering, electronics assembly only with disabled nutrition: This will prevent her failure with a random touch of a soldering iron of two and more subtle conclusions located nearby.
        • You can improve the sound using the sound maze instead of the phase inverter. Pay attention to the designs in which this labyrinth is. It is manufactured from fragments of cable box or additional partitions inside.
        • It is reasonable to pay time and use materials, components for better systems. No matter what audiophile you or not, good sound quality for the minimum (10 times smaller) money will pay off with more than. Columns will work out more than a dozen years.
        • Choose branded speakers, Beware of fakes.
        • Amplifier, unlike a good subwoofer, costs up to 100 times cheaper. Over the past 20-25 years, the microcircuits of Umzch fell in price. Select the speaker power amplifier – and it, and the column must be consistent.
        • Mandatory on a powerful amplifier chip fix the massive radiator. Otherwise, the amplifier, having worked for 40 seconds or a minute, turns off until the chip will cool to room temperature.
        • Fill out the free sections of the inside of each wall of the column by damping matter – She will get rid of resonance. Damper is suitable only for columns without a phase inverter.
        • In non-standard columns (from a bottle, auto strokes, round box from under anything) The passive emitter – speaker with two diffusers will help somewhat slightly.
        • If finance is allowed – apply the horn speakers: they create the effect of the listener’s presence in the hall, and not just pass the high-quality sound. For them there is a composite audio film, where the total low-frequency subwoofer is used – and multichannel satellites are connected to different high-frequency outputs.
        • After assembling the column, make its exterior finish – She will fit into the room design.

        About how to make an acoustic system with your own hands, look next.

        Rate the article
        ( No ratings yet )
        Add comments

        ;-) :| :x :twisted: :smile: :shock: :sad: :roll: :razz: :oops: :o :mrgreen: :lol: :idea: :grin: :evil: :cry: :cool: :arrow: :???: :?: :!: