Subwoofer Controller Frequency Phase & Booster

We will share the circuit to control and filter the low tone (Subwoofer), By using this subwoofer controller circuit you can add a more powerful bass sound to your subwoofer amplifier, in addition, this circuit is also equipped with frequency adjustments and phase reversals from 0-180 degrees. The following is the scheme of the subwoofer controller circuit:

In the above circuit scheme, using 2 IC op-amps, namely MC33178 (dual op-amps) and also MC33179 (quad op-amps). Besides using the IC, you can also use IC 4558 / NE5532 for the dual op-amp IC. As for the quad op-amp, you can use TL074 / LM324. The Subwoofer Gain / Boost settings are on the R23 potentiometer, Phase on R21, and frequency on R19. R23 and R21 use a mono potentiometer R19 use a stereo potentiometer.

In addition, the circuit is also equipped with a subsonic filter, which serves to cut the signal or low tone 0 - 40Hz. and frequency settings ranging from 50Hz to 250Hz. 

The subwoofer controller circuit works in the 12V-15V AC voltage range because the circuit is also equipped with a rectifier and power supply regulator using IC 7815 and 7915 you can directly connect to the transformer out (AC voltage). minimum rated current transformer 350mA.

For friends who want after attempting layout design of the subwoofer controller circuit schematic, we provide PCB layout SMD version with Double Layer you can download it at the end of the posting.

To facilitate the purchase of components we have also provided a BoM (Bill of Materials) file at the end of the post. By using BoM file you can upload it to the site and automatically LCSC.com you can simply select the spare and can be directly inserted into a shopping cart for purchase.

Download

Schematic, Gerber File, BoM File Subwoofer Controller .rar

PCB Layout Super Gainclone Amplifier LM3886

Hello DiY'ers, at this time I will share PCB Layout design in Gerber file for Power Amplifier circuit LM3886, this is Super Gainclone Amplifier LM3886 and PCB is very simple and mini design, like a pin to pin soldering. So it's very good PCB design for you LM3886 Gainclone amp.

PCB Layout tested:

Download
Gerber File PCB Layout Super Gainclone Amplifier LM3886

Operational Amplifier, Types of Op Amp ICs and Characters

Various types and advantages of each offered by each component manufacturer to captivate the hearts of audio lovers. This is often done by audio hobbyists. Fiddling with and experimenting mutually components to get the best sound possible.

In the market, there are many choices of components, from the cheap to very expensive. The endpoint is a personal taste that determines the choice. Unfortunately, more and more standard components have decreased in quality. Instead of improving but getting worse. Finding quality components is difficult and expensive.

Prioritize replacing active components that directly process audio signals such as ICs and transistors. Because the upgrade effect is likely to sound more real. After that, it is just a passive component that does not directly process signals such as power supply, tin, resistor, condensator, transformer, and others. The effect on sound repairs is very small or even the difference is not heard directly.

Do not let you get stuck to replace passive components with prices that are so expensive while the main IC that processes electronic signals is ignored. Don't also get caught up in suggestions. The easiest upgrade is to replace the IC op-amp in the preamp. Because just pull the IC from the socket and install a new IC. Sometimes it needs to be accompanied by changing a few components such as a resistor to adjust a new IC with an existing system.

Not all op-amps have super specifications such as very high slew rates, very wide bandwidth, very low noise, very low THD, and others sound good. For the record, only 2-3V / µs slew rate is needed for the op-amp so that it can cover all sound frequencies.

It's just that because the sound power is mainly music that is different, it takes at least 3 times the standard.

After all, replacing the standard op-amps like 741, 4558 and LM324 with the better ones, even the "super" ones, actually made a messy sound. Because this type of op-amp requires a special power supply and can be very unstable. For example, a good standard op-amp like NE5532 requires a decoupled supply (usually ceramic or mica) of no more than 2 inches (a super op-amp is a closer). Unlike 4558 which can run quite smoothly without decoupled. So if you want to replace the IC, you should first look at the PCB design, don't just replace it. Here are some IC op-amps quoted from several sources.

LM833 (dual) = Flat with a pretty good musical dynamics.

4558D (dual) = good but boomy bass, vocals hoarse, treble blunt.

NE5532 (dual) = Flat with good vocals on the ears and clear treble. Details are very good, but for some people, the bass feels less.

TL072 (dual) = Quite noisy, but with good dynamics.

LF353 (dual) = A lot of sound at the middle frequency, but quite natural and detailed. Treble and bass feel soft.

CA3140 (single) = Special amps with MOSFET input. Vocal and treble sounds are pretty good in the ears. Unfortunately, the dual version (CA3240) is only produced for the industrial and military circles.

LM324 (quad) = Noise is quite audible. Poor detail and blunt treble.

OPA2134 (dual) = the favorite op-amp for audiophiles with excellent staging and depth of music, but with less detail and musical dynamics.

AD823 (dual) = Very detailed and very natural, great dynamics, with very clear bass and treble.

And some other types of op-amp ic that you can try with the advantages and disadvantages.

CA3080 = Dual Transconductance (LM3080). (8 pins)

CA3130T = Single op-amp MOSFET uncompensated. (8 pin)

CA3130E = Single op-amp MOSFET/bipolar/compensated. (8 pin)

CA3140E = MOSFET LM741 pin compatible. (8 pin)

CA3160E = Single op-amp. (8 pin)

CA3240E-1 = Dual op-amp. (14 pin)

CA5130E = Single op-amp. (8 pin)

CA5160E = Single op-amp. (8 pin)

ICL7611D = Single low-power op-amp. (8 pin)

ICL7641E = Quad low-power op-amp. (14 pin)

ICL7642E = Quad low-power op-amp. (14 pin)

ICL7650S = Chopper stabilised op-amp. (14 pin)

ICL7652C = Chopper stabilised op-amp. (14 pin)

LF347N = Quad high-performance op-amp. (14 pin)

LF351N = Single high-performance op-amp. (8 pin)

LF353N = Dual high-performance op-amp. (8 pin)

LF355N = Single high-performance op-amp. (8 pin)

LM10CLN = Dual Low-voltage compensated with reference. (8 pin)

LM301N = Single general-purpose op-amp. (8 pin)

LM301AN = General purpose uncompensated. (8 pin)

LM308N = Single low-drift op-amp. (8 pin)

LM324N = Quad low-power compensated. (8 pin)

LM358N = Dual low-power compensated. (8 pin)

LM614 = Quad Operational Amplifier and Adjustable Reference. (16 pin)

LM741 = Single General purpose uncompensated. ( 8 pin)

LM833N = Dual low-noise Hi-Fi Audio compensated. (8 pin)

LM1360N = Dual transconductance. (16 pin)

LM1458N = Dual general-purpose compensated. (8 pin)

LM3900N = Norton Quad Current Differencing. (14 pin)

LM627CN = Precision low-noise. (8 pin)

NE531N = Single high-performance. (8 pin) 

NE5532 = Dual low-noise. (8 pin)

NE5534P = Single Low-noise high-output. (8 pin)

NE5539 = Single wide-band. (14 pin)

OP27 = Low-noise precision (8 pin)

RC4558P = Dual high-performance. (8 pin)

TL061CP = Single low-power. (8 pin)

TL062CP = Dual low-power. (8 pin)

TL064CN = Quad low-power. (14 pin)

TL071CP = Single low-noise. (8 pin)

TL072CP = Dual low-noise. (8 pin)

TL074CN = Quad low-noise. (14 pin)

TL081CP = Single high-performance. (8 pin)

TL082CP = Dual high-performance. (8 pin)

TL084CN = Quad high-performance. (14 pin)

TLC251 = Low-voltage Power CMOS. (8 pin)

UA4136 = GP low-noise. (14 pin)

741 = Single General purpose uncompensated. (8 pin)

741S = Single High-speed. (8 pin)

747 = Dual general-purpose. (8 pin)

748 = Single general-purpose. (8 pin)

LM759 = Power op-amp. (4 pin) 

Of all the ic above there are some that have the same pinout. There are also a few different ones. So please check the datasheet before you install it. So that the IC op-amp can work according to its function. Maybe some of them are rare and difficult to get. You can search for other types of IC that have the same character.

DIY 2kVA SMPS 90V 15A HB PFC with IR2110 Mosfet Driver

Hello, this time I will build Switching Mode Power Supply (SMPS) with Half Bridge (HB) topology, with Power Factor Correction (PFC Boost Converter) controller with chip NCP1653 SMD SO-8. PWM Control Circuit using SG3525 and MOSFET driver using IC IR2110. This SMPS can produce output power up to 2200 Watt (peak) Load test at 8 Ohm. Output SMPS 90VDC Symmetrical.

Below the schematic SMPS HB PFC IR2110 2kVA 

Download Schematic and Partlist at the end of this Post.

PWM Supply using 16V supply from transformer PWM Sanken B2 Input 500V output 12-19V and PWM controller using UC3845 MOSFET can be using IRFPG40 N-Channel Power Mosfet.

EMI Filter for this SMPS can be using 3.5mH 

NTC also can be using Resistor 5W  47-100Ohm

Core PFC using this ferrite core full turn 1x with copper wire 1.5mm, 

Core Diameter Outer = 47mm, Inner=24mm, Thickness=18mm

Trimpot adjustment:
1. For PWM frequency adjustment 30-130kHz
2. Duty cycle adjustment 30-40% Low Side gate adjustment
3. Overcurrent adjustment sensitivity
4. Aux DC out adjustment

PWM Gate signal at 82kHz and Duty Cycle 38.1%

Transformer Ferrite EE55/28/21

Np Working Frequency

30-40kHz = 18 turns

40-50kHz = 16 turns

50-60kHz = 15 turns

60-80kHz = 14 turns

80-100kHz = 12 turns

100-130kHz =  10 turns

Np 14 turns = Ns 6 + 6 output 90V copper wire 1:1.

If you want to make this SMPS I will share the Gerber file free version, Layout SMPS like this. OCP using a transistor.

Video Assembling SMPS HB PFC IR2110

Download
Schematic SMPS HB PFC IR2110 PDF
BoM ( Part List) SMPS HB PFC IR2110
Gerber File SMPS HB PFC IR2110

See Also
SMPS Fullbridge 4kVA

1600W Power Amplifier Class-G PCB Layout

The following is a PCB layout for a G-class power amplifier, previously here is a little explanation about class G power amplifiers, namely Class G classified as an analog amplifier which aims to improve the efficiency of B / AB class amplifiers. In class B / AB, the supply voltage is only one pair which is often denoted as + VCC and –VEE for example + 12V and –12V (or written with +/- 12volt). In class G amplifier, the supply voltage is made multilevel. Especially for applications that require high voltage power, so that the supply voltage is efficient, there are 2 or 3 different pairs. For example, there is a supply voltage of +/- 70 volts, +/- 50 volts and +/- 20 volts. The concept of class G Power Amplifier circuit as shown in figure 1-30. For example, for soft and low sound strings, the active pair is a supply voltage of +/- 20 volts. Then if needed to drive loud sound, the supply voltage can be switched to a maximum supply voltage of +/- 70 volts.

And here is a PCB Layout power amplifier 1600W Class-G Amp, you can also create or print this PCB yourself by downloading the Layout file in the form of a PDF file. End of posting.

This Class G power amplifier can be supplied voltage up to 120VDC Symmetrical and at least 42VDC symmetrical. This power amplifier can produce power up to 1600W RMS on an 8 Ohm Load with a good and maximum power supply voltage to control this amplifier. In addition to the final transistor, it is also very influential, you can use the original Toshiba 2SC5200 / 2SA1943 or NJW0302 / NJW0281G transistors in order to get quality and maximum results.

Download

1600W Power Amplifier Class-G PCB Layout

More Amp: Class-D D4K5 Gerber 

Power Amplifier Class-D IRS20957 Behringer B215D

Class D Power Amplifier circuit is on the rise especially in recent years due to its very high efficiency and relatively cheap price and Advantages of Class D Power Amplifier Circuits

The advantages of class D power amplifiers are:

• Efficiency on supply power requirements
• Simple physical size
• Cool design and very practical
• The heat produced is very minimal

Class D audio amplifier is a switching amplifier or PWM as previously explained. By applying the Switching model it can reduce the power loss in the final amplifier and allow for the efficiency of 90% - 95%. The input audio signal is used to modulate the PWM carrier signal that drives the final amplifier. Before being fed to the speaker, the Low Pass Filter (LPF) is passed to eliminate the high-frequency PWM carrier.

And on this occasion I will share the schematic along with the PCB layout for the D-class power amplifier, the Behringer B215D schematic power amplifier you can see below:

My above scheme taken directly from the original scheme of the BEHRINGER B215D or can view more details you can visit this link: http://schems.com/bmampscom/behringer/Behringer_B215D.pdf

And for PCB layout you can print it yourself because I also provide PDF files for PCB Power Amplifier Behringer B215D. PCB Layout with double layer boards:

The PCB layout includes input balance, protection, and signal paneling. The components used are SMD packaged, specifically for IC IRS20957, you can buy the IC in the nearest electronic shop or online store. With cheap prices around 2 $ USD.

The amplifier uses 2 MOSFET transistors for the final and uses LPF with a 22uH core. For the power supply, you can use a power supply with a voltage of 50V - 90VDC with a current of at least 10Ampere. And the target power that can be produced by this amplifier is 600W RMS.

Video Class-D Amplifier IRS20957

Download

PCB Layout Power Amplifier Class-D Behringer B215D IRS20957 pdf

Gerber Layout Download

How to Calculate SMPS Transformer - Formula

Some people may still be confused about how the rules for the SMPS transformer or commonly called ferrite transformers.

Previously there were several rules for selecting wire diameters based on the frequencies used.

After knowing the wire that is used based on the frequency of the MOSFET driver that is used now we see first the formula determines the primary winding (Np).

Description

Npri = primary winding

Vin = Effective Input Voltage

f = frequency

Bmax = maximum flux density 1200 - 2000

Ac = Effective Cross Sectional Area (see datasheet of each type of transformer core (example EI33 = 1.19, ETD39 = 1.25).

For example, the above formula is specifically for push-pull topology.

For example, I want to make an inverter transformer with specifications:

Effective Vinput = 12v

Minimum Vinput = 10,5v

Max output = 330v

Normal Vout = 220v

Driver frequency = 50KHz or 50000Hz

then the primary (Np) and secondary (Ns) are?

I previously set the Bmax I want to use is 1600 (range Bmax 1200-2000) and uses EI33 core type with Ac 1.19

Np = (12v x100000000) / (4x50000x1600x1,19)

Np = 3.15 my turn rounds to 3 turns

check the Bmax value again not to be less than or more than the adjusted range above. then if I turn rounds into 3 (Np = 3).

Bmax = (12v x100000000) / (4x50000x3x1,19)

Bmax = 1680 (still in the range 1200-2000)

Now we calculate Primary Turn (Ns). because the output voltage can be adjusted or stabilized by setting the percentage duty cycle, if there is a voltage input drop to a minimum of 10.5v, the duty will increase to a maximum of 98% to maintain normal output stability at 220v or at least above 200v. For that N = 330v / (10,5v x 98% duty) = 32 so

Ns = N x Np

Ns = 32 x 3

Ns = 96 turns

To optimize the voltage-current, you can double the number of wires in accordance with the power and capacity of the bobbin.

Suppose you make a transformer with an output power of 300 watts, then 300watt / 220v = 1.4Amper and see the wire that can be used with a 50KHz frequency in the AWG table above. for example the wire used is 0.5mm then 1.4 Amp / 0.5 = 2.8 or rounded down or upward to be 2 or 3 double wire and of course the coil must be 2 or 3 times more primary wire used than secondary because Vin 12v then 300w / 12v = 25A so that the primary transformer wire does not overheat it must be joined into several wires in accordance with the bobbin ability or the capacity of the transformer bobbin.

Power Amplifier APEX BA1200 PCB Layout PDF

Hello friends Elcircuit, this time I will share a PCB layout design for power amplifier BA1200 APEX, this is a driver PCB power amp, you must add the final transistor for this amplifier. The output power is quite large if it is supported by an adequate power supply and final transistor. To use a power supply you can use 45VDC - 90VDC. In addition, you can use the Toshiba 2SC5200 / 2SA1943 final transistor with 14 sets. The power produced can reach 1500W. And this amplifier is very suitable for bass amplifiers or for the use of subwoofer speakers.

Following is PCB Layout from APEX BA1200, to make it easier to make PCBs I provide files in PDF format that you can download at the end of the post.

Download

PCB Layout Power Amplifier APEX BA1200 RAR File

Class-D Amplifier Yamaha YDA138

Hello friends, on this occasion I will share the power amplifier scheme using the Yamaha YDA-138 class D power amplifier chip and also class AB amplifier headphones which are included in the YDA138 chip.

The following is the YDA138 Class-D Yamaha Amplifier power amplifier schematic:

This amplifier is very suitable for use in the room, using 6-8 inch speakers, the power that can be produced by this amplifier is around 10W RMS at 4-ohm load. And the above scheme is specifically for the use of 4-ohm speakers because in the LPF section it uses 470N with a 10uH inductor. For more details, you can also see the IC YDA 133 datasheet.

Because I want to make an amplifier with good sound quality, I use an audio grade component. Check out the video making for this amplifier.

In the video, I use a power supply with a battery so that it can be made portable for its D-class amplifiers and for its headphone headphones. My battery uses 3 18650 with a 4.2V 3Ah voltage each so it can produce 12.6V voltage, and I give BMS (Battery Management System) to make it safer. For charging can use a voltage of 13.8V, these amplifiers can run up to 24 hours nonstop using a 4 ohm 6-inch speaker. in full load, this amplifier only consumes no more than 3W.

If you are interested in making this amplifier, I provide Gerber files to download, and you can order PCBs at the PCB manufacturing plant.

The following PCB Layout Class-D Amplifier Yamaha YDA138 

Download:
PCB Class-D Amplifier Yamaha YDA138 Gerber

Subwoofer Filter 4558 complete Regulated Power Supply

Hello friends, this time I will share the 4558 filter subwoofer circuit which is similar to the previous filter subwoofer. Why is a subwoofer filter needed for a power amplifier circuit? For the important problem of whether or not it depends on the usefulness of the power amplifier itself, whether the power amplifier is devoted to subwoofer speakers or not. If so, then this subwoofer circuit is very important.

Usefulness is very good, but it also can clarify the low tone and eliminate the middle tone and high tone, so that bass issued by subwoofer speakers getting kicked. Back to the topic of this subwoofer circuit, this circuit I design and I modify it by adding a regulated power supply circuit by IC 7815 and 7915. Below the circuit schematic of subwoofer filter complete power supply:

Part List

C1,C3	47U
C2	47n
C4-C5	470n
C6-C7	1000U
C8-C9	100U
C10-C11	100n
R1-R2	47k
R3	1M
R4-R6	10k
R7	22k
R8-R9	68R
U1	RC4558
U2	7815
U3	7915
D1-D4	1N4007G
INPUT,SUPPLY	SIL-100-03
RV1	50k
SUBWOOFER	SIL-100-02

Feature:

• 20Hz - 250Hz Frequency output filter

• 12V - 30V DC input voltage

• 12V - 25V AC input voltage

• Using dual op-amp IC: 4558D, JRC4558, NE5532, etc.

• Single gain boost

• Regulated Power Supply using 7815/ 7915 also can be using 7812 7912

• 2 Channel (Stereo Input)

• 1 Channel Output (Subwoofer Output)

 PCB Layout Design Subwoofer Filter Circuit:

 PCB Layout Design Subwoofer Filter in two layers:

You can order this PCB from JLCPCB it's very cheap PCB Subwoofer filter 4558 include regulated power supply for just $2 /10pcs, you can download the Gerber files first at the end this post. Upload the Gerber files and order it at JLCPCB.com, $2 PCBs & Big Discount on First order.

PCB by JLCPCB

Download:
PCB Layout Subwoofer Filter (top).pdf
PCB Layout Subwoofer Filter (bottom).pdf
PCB Layout Subwoofer Filter.Gerber