3 way passive crossover and mounting their respective cabinet we present a 3-way crossover, which can be repowered according to the wattage of your amp. in this video it shows how to install the crossover in the corresponding acoustic cabinet. they have also attached the respective planes.
this crossover produces a attenuation of 12 db per octave, in a impedance of 8 ohms. features this crossover it consists of three circuits: the high pass filter, it consists of a series capacitor and a parallel coil;
only allows the passage of frequencies above 2000 hz, to the point of the reproducibility of the tweeter. the second circuit is a bandpass filter, formed by a series capacitor, a series coil and a parallel capacitor, only allows the passage of frequencies from 1000 hertz to 2,000 hertz. and the third is the low pass filter,
formed of a series coil and a parallel capacitor, that only allows the passage of frequencies between 20 hertz to 500 hertz. materials a printed circuit board can made in bakelite or as in this case, it was manufactured in fiberglass.
22.4 meters of 21 gauge magnet wire, 7.4 m 18 awg gauge, and 19 meters 16 awg gauge silicon iron sheets shaped (i), with perforations at the ends. these are recycled. 10 ohms at 20 watts resistor, four 33uf capacitors, at a voltage of over 200 volts,
two 22uf capacitors, four 4.7uf capacitor, 8-pin terminals of the type tongue or sprat of 6.3 mm, a plastic reel can be recycled from a roll tin welding, 2 screws 1/8 by 1.5 inches and 3 screws 1/8 by 2 inches. all with nut and washer.
instant glue, synthetic glue for wood, thinner, masking tape, sheets of straw board, tin welding, clear contact paper, and black paint to oil-based. tools
a multimeter having service of millihenries measurement. scissors, soldering iron, scalpel tip type of spear, screwdriver, tweezers, one pencil, coarse grit sandpaper,
one meter, brush teeth recycling, a 5/64 inch drill bit, and an electric drill. construction to construct the formwork of the square coils, requires a piece heavy cardboard,, of at least 3 mm. and is very rigid.
for a good thickness we paste 3 straw board sheets, to making a sandwich. between each sheet, abundant wood glue is applied. is placed a table over the sheets and on top is placed a lot of weight, for adhesion between the sheets is optimal. while dry the cardboard sheets, we take the plastic reel which will be the core of the tweeter coil,
and through the opening it comes close to the cylinder, introduced one end of the magnet wire. the wire is secured and begins to wind the 22.4 meter 21 gauge wire, considering that the wire is not mounted or very large spaces, between one turn and another. the wire should be as tight as possible. las vueltas de alambre deben estar juntos y ordenado.
at the end of winding the wire 22.4 meters, carefully is made a hole in the reel, the opposite side to the hole, the wire input. and inserted the tip end of the wire, making sure that it does not unwind. with a piece of coarse grit sandpaper, they should be sanded both ends of the coil wire, and removing the dielectric varnish coating. and so having conducting electricity,
to measure the coil. now the multimeter is placed in the range of 20 millihenries, and it verified that the coil has been in the correct value. it should be measured approximately 1 milihenry. now, isolate the coil with clear contact paper.
the height of the coil is measured and cut a long strip of adhesive paper. we removed the protective paper and finished pasting the sticker paper above the wire. thus the wire is protected from scratches and it held tight. now: to make the speaker mid range coil,
are used 30 silicon-iron sheets having a size that match with drawing of the components mask. taking one of the sheets as template, it is marked distance on the cardboard, there are between the two inner edges of the holes. is measured the distance from the edge of the sheet to the mark, y la medida se mueve a la parte superior de la hoja. cut the cardboard sheet,
using a scalpel and a ruler. take 30 iron silicon sheets, and they came together with masking tape. and the coil core is created. they should be snug and aligned. the core is then placed on the edge of the straw cardboard strip and is wind a complete turn.
is made a mark where the winding ends cardboard, and cut the surplus. should check that the cardboard is to exact size and it sticks around the core, using instant glue. is moved measuring the width of the formwork, drawn on the component mask, to the cardboard sandwich done previously with 3 sheets. copiamos la medida a la parte de arriba del carton,
and cut with a scalpel. then are cut two equal rectangles, 5 mm above aside. now; using the end of the core as mold, draws a square in the center of the cardboard. cut a square with a spearhead scalpel, until make a window. it must be polished with a scalpel,
until just measure. are placed both laterals , one on each side of the core, thus building our formwork. we applied instant glue in both union of laterals with the center of the formwork. then reserve the sheets of the paint, covering them with masking tape and we proceed to paint the formwork,
with wood glue. this will give rigidity to the cardboard and protect it from moisture. to end formwork is painted with oil-based paint, thus achieving a good finish. now that the formwork is dry, it makes a hole as close to the core. inserted 18 gauge wire into the hole,
the wire tip is secured, and are wound the 7.4 meters of wire, it should fit snugly, not mount a turn on the next turn and shall not be space between their turns. at the end of winding the 7.4 meters wire, it should be carefully make another opposite drilling diagonally, and at the outer edge,
to introduce the tip of the wire through this hole. this ensures that the wire will not uncoil and it remains tight. remove the dielectric varnish coating covering the magnet wire. you should check that the coil measure is 0.8 millihenries successfully. the coil is completed by placing a coating of clear adhesive paper.
to make the coil woofer, are used 30 silicon-iron sheets, having a size match with drawing the pcb. the 30 sheets are joined, using masking tape, forming the coil core. it marked on the cardboard the inner distance between the two holes of the sheets.
cut a strip of cardboard than have this measure, the edge of the cardboard strip straw, and is wound a full turn. made a mark on the place where finished rolling the cardboard and we cut cardboard surplus. sticks the cardboard around the core, in the thick cardboard copy the width of the formwork which is drawn on the component mask.
of this measure, cut a strip with the scalpel. make two equal rectangles and the windows are cut into the center of the rectangles, to create the laterals of the formwork. both laterals are glued to the sides of the central structure cardboard, they will covering the sheets or core. apply instant glue at the junction of the laterals
the framework is painted with wood glue, to give strength to paperboard and for finally the formwork, it is painted with oil-based paint. this formwork also carries the two holes of the terminals. the wire is inserted the hole closest to the core and ensures, then it begins to roll 19 meters of wire 16 gauge
making sure it's tight, unmounted one turn above of each other and without spaces. at the end of winding the wire 19 meters, pass the tip end of the wire, on the other hole in the formwork. his ensures that the wire will not uncoil and it remains perfectly adjusted. we covered the coil wire with clear adhesive paper.
this protects the wire and gives a good presentation. we verify that building the coil woofer, it has been with the desired inductance. to our satisfaction it measured 3.6 millihenries. now it proceeds to place the terminals n the pcb. weld the terminals,
simultaneously joining welding, and soldering iron, on the point to be welded. place the 4.7uf capacitors of tweeter, knowing that they must be looking in the negative pole, and then welded. now place the two 4.7uf capacitors of the midrange, weld,
similarly placed the 22uf capacitors of the midrange speaker, and weld. are also placed the four 33uf capacitors of the woofer. it is very important to note the polarity of the capacitors, as reported by the components mask. we proceed to weld the woofer capacitors. remember that the right way to weld,
should be done joining soldering iron, welding and workpiece simultaneously. cut terminals surplus of the capacitors, with the help of a nail clipper or wire cutter. put the coil of tweeter, and weld its terminals. now placed the coil of the midrange speaker, welded the coil
and placed the coil of the woofer . weld the terminals in to the card, and cut the surplus wire. placed the 10 ohms resistor at 20w in their respective place, the tweeter coil must be secured tightly with a screw, a plate and a nut. the coils of the woofer and the midrange also secured with interns screws,
washer and nut. the vibration of the speakers, can loosen the coils. for this reason, the coils must be sufficiently tight. thus it has been assembled and completed our 3-way crossover of second order. remember that you can change the values of the coils and capacitors,
to achieve cutting frequencies according to your taste. you also need to do this, when you plan to use speakers, requiring a specific frequency. now we hear the sound test live. connect a cable to the amplifier output and the other end of wire is connected to the input of the crossover. howdy friends!
we present the soundcheck our passive crossover of second order and 3-way it means having an output for tweeter, one output for midrange speaker and one output for woofer. this crossover is different from before because their coils are larger to thereby allow more wire
or a thicker wire in case you want to get better the crossover obviously turns of wire that we teach are for these frequencies, and gauges that are specified here. if you want to use thicker wires, you will have to recalculate the turns using a inductometer.
well let's hear it then first let's connect the baffle, the tweeter output. now connect the baffle in the midrange output. and now in the woofer output. we hope that this project will please everyone. you'll find it on the website,
construyasuvideorockola.com greetings to all the crossover installing in its corresponding 3-way cabinet these are the acoustic boxes than will be our speakers or 3-way cabins. hey are built using chipboard 1.5 mm and painted with synthetic waterproofing body schutz.
this design was intended specifically to be combined with our crossover, with excellent results. before placing the speakers, is necessary soundproof the box, making an acoustic treatment. to this should stick a piece of wadding or felt, in the background of the midrange and the tweeter compartment.
apply plenty of contact cement, and then sticks the wadding, pressing evenly over the glue. now are covered all the walls of the woofer compartment, except the background, where he will place the crossover. thus, the boxes are equipped to absorb parasites sounds and give a sharper bass.
now placed the metal base, which serves to position the cab on a tripod. this goes with 4 through bolts, and it screwed with double washer and nut, one a simple and other security. now are placed grip handles. fixed with carriage bolt and nuts inside the box. placed the speaker terminal, it adjust with 4 self-tapping screws.
now placed crossover. screwed to the background of the box, before the bass reflex connected the two cables coming from the speaker terminal, at the input of crossover. it must respect the polarity. the tweeter bullet type, are homemade. they placed two screws from back to front,
for easy installation. in the acoustic box. they secured with locknuts. now now connected the twitter to the corresponding output in the crossover. we proceed to place the midrange speaker. this is 6 inches. it is secured with self-tapping screws
y is connected to the crossover at its respective output. then made woofer connection. los cables estã¡n conectados en sus terminales,, and the other end of the cable, goes into the woofer output the woofer it ensures with all possible screws, since it is the most vibrating speaker.
we have the baffle or 3-way cabin ready to sound. by way the speaker protection, it is placed a grid that covers the entire front of the baffle. these cabins of 600 watts peak, are ideal for business or personal use. widely used because of its easy construction and good sound. watch suggested videos we invite you to subscribe to our youtube channel
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