Subwoofer diy ru

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• DIY Audio Projects Forum
• Subwoofer Box Calculator
• Rebuilt car computers
• need subwoofer diy amp project
• Speaker for a subwoofer with your own hands - Community "DIY" on DRIVE2
• IsoAcoustics Aperta Sub Isolation Subwoofer Stand
• Can am maverick max forum
• Diy bass subwoofer amplifier
• SVS PB-2000 Pro 12" Ported Subwoofer - Full Review Dual

WATCH RELATED VIDEO: DIY Subwoofer Enclosure 2021 Edition - Caliwood Specialty

Robot or human?

Therefore, the idea appeared to create something new. The new criteria are the correspondingly high output power and the ability to operate at low impedance loads. Functionally, the amplifier consists of four blocks, a voltage converter, a filter block, a protection block and, accordingly, the power amplifier itself.

I'll tell you briefly about each of them. The heart of any power amplifier is the power supply. It is clear that 12 volts from the battery is clearly not enough to obtain high output power. Having rummaged through the forum, I found a fairly simple and relatively good scheme.

The TLNC microcircuit serves as the brain of this converter, it creates pulses of a given frequency. The frequency is set by the elements R1 and C8. Further, these pulses fall on transistors VT1, VT2, which are control keys for the output transistors. Opening alternately, the output transistors create an alternating current of high frequency in the primary winding.

The transformer increases the voltage to the specified 60V, then the current is rectified by the diode bridge. Chokes and capacitors smooth out ripple and high frequency interference. All the edges of the ring are rounded off with a file, then the trans is wrapped with cloth tape. The primary winding is wound with 10 cores with a diameter of 0. The turns are distributed evenly over the ring.

At the terminals, all the wires are twisted. After the primary winding, another layer of electrical tape. The radiator for the output transistors is a duralumin plate, mm thick, about 10 cm long and about 3 cm high. It is realized with the help of a voltage stabilizer assembled on transistors VT8, VT9 and rolls , Transistors and rolls also have small aluminum radiator plates.

To power the protection unit, a tap is made from the positive side of the amplifier power supply. The voltage drop is realized by the two-watt resistor R With the amplifier off, the current consumption is very small. The board also provides a connector for cooling fans. The dimensions of the printed circuit board are xmm. The circuit of a high quality power amplifier is also taken from the forum site. This amplifier is called "" here. The circuit was chosen for its high sound quality, high power, relative ease of setup, and high bass potential.

A properly assembled amplifier works immediately, setting is reduced to setting the quiescent current. It is set with a trimmer resistor R First, set the minimum quiescent current and let the amplifier run for minutes at average power. After that, the input is short-circuited, the acoustics are turned off and the quiescent current is set within the range of mA.

It is measured by the voltage drop across the resistors R24 - R27, it should be within 0. The voltage in the right and left shoulder may differ slightly. In the circuit, it is desirable to use film capacitors K or imported analogs, C8, C12, C13 - you can use ceramics.

It is advisable to select output and pre-output transistors in pairs, well, at least from one batch, it is also desirable to select in pairs VT1, VT3 and VT2, VT4.

In the photo resistors R1 and R2 are 0. For transistors VT5, VT7, a small aluminum radiator is made. Dimensions of the printed circuit board x80mm. Since the amplifier is for a subwoofer, it is necessary to separate the summed, narrow-band low-frequency signal from the general wide-band stereo signal.

For this, the assembled filter unit. All capacitors in signal circuits are film, with the exception of C3, C4, C6, C8. In my case, ceramic shunts are also C5, C7. If the sensitivity of the amplifier turns out to be small, the gain can be changed with resistors R7, R8, R9, R It can be increased by increasing the ratings R9, R10 and decreasing R7, R8.

The diagram is shown below. The protection block will save the subwoofer in the event of a malfunction in the amplifier and protect the speaker from constant voltage. It also eliminates power-up clicks by connecting the load a few seconds after power-up. One drawback is that the circuit is powered from the same power source as the power amplifier, therefore, when turned off, the relay does not turn off the loudspeaker immediately, but after a few seconds, during which the capacitors of the power supply are discharged.

The protection unit and the filter unit are mounted on one printed circuit board with dimensions x53mm. There are no places for Zener diodes VD2, VD3, I have them soldered in the place where the power is connected to the board, although I think you can do without them, perhaps then the relay will work a little faster when turned off.

All boards are mounted on a 3mm thick duralumin plate. The radiator of the output transistors is also screwed to it. Between the heatsink and the base, a layer of thermal paste is applied, so the plate also acts as a heatsink. The output transistors are pressed directly against the heatsink, between the heatsinks and the transistor housings, an insulating pad and a layer of thermal paste. The side walls are made of x47x15 mm oak planks.

On the inside of the strips, at the bottom, chamfers are made into which the base of the amplifier is inserted. From the outside, the planks were brown and varnished. The front and back walls are also made of duralumin plates. On the front panel, there are input and output terminals, controls for sensitivity, cutoff frequency and phase, a power indicator, and a cooler.

Another cooler is mounted on the back panel, and holes for air circulation are made. Power terminals are also on the rear panel. The front cooler works by blowing cold air outside and inside the case, directly onto the radiator. Rear to extract hot air from the body. There is enough cooling in the autumn, tests have not yet been carried out in the summer, I still do not exclude overheating at high power.

Therefore, when repeating the design, I would advise you to slightly increase the size of the radiators. The top cover is made of laminated MDF, its thickness is mm, the top is black paint and varnish. The amplifier sounds wonderful, powerful, energetic, the power reserve is felt, the bass is tight and deep.

It all started with the fact that a year and a half ago I bought a twelve-inch woofer in order to assemble a car subwoofer. But there was not enough time, and the speaker was stale in my apartment. And now a year and a half later, I finally decided to assemble, but not a car, but an active home subwoofer. In this article I will describe step by step instructions for the calculation and assembly of this type of subwoofer.

Usually these parameters are indicated by the manufacturer in the loudspeaker passport or on their website. But now most of the loudspeakers on sale in the markets including my loudspeaker do not have these parameters or do not correspond to them despite numerous attempts, I have not been able to find my speaker on the Internet, and about the Thiel-Small parameters already there was no question.

Therefore, we will have to measure everything ourselves. First, let's check the linearity of the sound card's frequency response. There are a large number of programs that automatically measure the frequency response in the range of Hz when the state of the headphone output is connected to the microphone input of the sound card. But here I will describe the manual method for measuring the frequency response in the Hz range only this range is important for measuring the Thiel Small parameters of a low-frequency radiator.

If you do not have an AC voltmeter with the ability to measure voltage of the order of 0. Typically, these multimeters measure AC voltage with an accuracy of 0. To measure an alternating voltage of the order of several mV, you just need to put a diode bridge in front of the multimeter input and measure it in the DC voltage meter mode in the range up to mV.

First, we connect the voltmeter to the headphone output either to the right or to the left channel. In this case, we look at the voltage value on the voltmeter. If the maximum amplitude difference is within 2 dB 1. Let's move on to the long-awaited Thiel-Small parameters. The minimum parameters by which you can calculate and design the acoustic design in this case, a subwoofer is:.

For a more professional calculation, even more parameters are required, such as mechanical quality factor Qms , electrical quality factor Qes , sensitivity SPL , etc. In this case, the speaker should be in free space as far as possible from the walls, floor and ceiling I hung it from the chandelier.

Open the NCH Tone Generator program again, adjust the volume as described above, set the initial frequency to 10Hz and begin to gradually increase the frequency in 1Hz steps. In this case, again, we look at the value of the voltmeter, which will first increase, reach the maximum point Umax at the natural resonance frequency Fs , and begin to decrease to the minimum point Umin. With a further increase in frequency, the voltage will gradually increase.

The graph of the dependence of the voltage active resistance of the speaker on the signal frequency looks like this. The frequency at which the voltmeter value is maximum is the approximate resonant frequency at 1Hz steps. To determine the exact resonant frequency, it is necessary to change the frequency in steps of not 1Hz, but 0.

We write down the resonant frequency Fs , the minimum value of the voltmeter Umin , the value of the voltmeter at the resonant frequency Umax later they will be useful for calculating the following parameters. Determination of the total electromechanical quality factor Qts of a loudspeaker. Find UF1, F2 by the following formula. There will be two frequencies.

DIY Audio Projects Forum

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Subwoofer Box Calculator

Here you will find manuals, brochures and specification on DALI subwoofers, cables and loudspeakers that have been discontinued and are no longer sold in stores. Specifications and manuals for the discontinued DALI products are still very much in demand. We are constantly working on adding discontinued speakers to the site from our catalog of products. This means that this site is not a complete list of our discontinued speakers, but a work in progress and our speakers will be added on the list below as we extract the data from our archive. Standing a striking 2. Through clever engineering, development of new technologies, and five years of IKON-experience, we made it possible to create a speaker series that is even better than the original. A series honoring, both the IKON-heritage as well as new listeners' ears, eyes, and minds.

Rebuilt car computers

It was decided to collect the "luban" speaker, with a very hard washer. All bolts and adhesives were bought in the construction. For a start, everything was disassembled to the state of the frame and magnets, then the magnet was removed, centered, cleaned the MW, then the magnet was pumped and violated under painting. We are trying on the dip to the lip, and. Diff is Velik.

need subwoofer diy amp project

The revival of the legendary Hannibal series - absolutely new extremely-loud solutions that have absorbed all the best technologies from our Deaf Bonce products! The combination of a powerful speakers motor and the most lightweight moving system allows you to maintain high control over the speaker and consequently get the high detailed sound reproduction at any volume. A wide frequency response range, natural sound and extreme loudness - it was these criteria that guided Alphard Group engineers in the development of these speakers. The heart of the AP-M60A V2 is the most powerful based on ferrite motor, which, combined with a unique and lightweight moving system, provided record-breaking technical specifications and as a result the best sound quality in the class of extremely loud speakers! Feel the new power of the bass! Literally, we have changed every knot of our subwoofer, starting from the appearance, and finishing with the improvement of all its technical specifications.

Speaker for a subwoofer with your own hands - Community "DIY" on DRIVE2

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IsoAcoustics Aperta Sub Isolation Subwoofer Stand

Therefore, the idea appeared to create something new. The new criteria are the correspondingly high output power and the ability to operate at low impedance loads. Functionally, the amplifier consists of four blocks, a voltage converter, a filter block, a protection block and, accordingly, the power amplifier itself. I'll tell you briefly about each of them.

Can am maverick max forum

RELATED VIDEO: DIY CHEAP Subwoofer - Mivoc AW 3000 - Versacube [HD]

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Diy bass subwoofer amplifier

Sundown Audio SA V. OWC Crafted from extra soft high quality super stretch denim, which effectively helps exercise foot muscle. Our wide selection is elegible for free shipping and free returns. S technology to give you a perfect engraved shift knob with no paint. Lining fabric: thickened durable polyester. LED Lights operate on 3 patterns - solid.

SVS PB-2000 Pro 12" Ported Subwoofer - Full Review Dual

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