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View LM #3) BPA – W Bridged/Parallel AB Amp reference design. Specifications, support documents, and additional tools available at Digi-Key. Your load looks mostly resistive, not capacitive. I think most design include a large capacitor between the speaker and the driver to block DC. W-power-amplifier-with-bridge-parallel-configuration The project is based on six LM to produce a well designed audio.

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Anyway make sure you don’t use a polarized capacitor. Download my parts list to see the components I used to get great sound quality from this amplifier. Thank you for your excellent work on this guide.

A Complete Guide to Design and Build a Hi-Fi LM3886 Amplifier

Success with the build, Ed Reply. Thanks for your answer. After setting the gain, the next step is to balance the input bias currents by choosing values for R in and R b:.

Though I have no expertise in Physics, was able to understand the technical things in this article. Mustafa Kamal on November 17, at The best article ever. So the question is, if and how much would adding fans to near the circuit affect sound quality? The highs are clear, lm3868 not harsh at all. Toivo on April 17, at 6: The power supply and each of the individual components do have a massive influence, especially as there are so bridfe of them.


With the right layout and component selection, you can build an excellent sounding Hi-Fi audio amplifier that will rival high-end amps retailing for several thousand dollars or more. John on August 15, at 3: The datasheet gives a value of 2. You explain in the tutorial and as the actual photo of the cap shows the actual value of the polypropylene is.

A Complete Guide to Design and Build a Hi-Fi LM Amplifier – Circuit Basics

Dave on November 1, at Too much clarity is not something people are used to, which can be an issue still experimenting Oh! George beidge December 8, at 8: Your load looks mostly resistive, not capacitive.

Which voltage level gives this output? However, due to lack of deep knowledge in electronics, the project was llm3886 behind. As C13 is used to stabilize the amplifier I would just like confirmation that the parts list and silkscreen are correct.

At resonance does it turn resistive i. The capacitor is there to filter any radio frequencies picked up by the chassis. How do I get an essentially flat response for KHz? At high frequencies, the impedance of C sn is very low, so high frequency current is shorted to ground. For the power supply circuit, how can I connect diodes and capacitors to safely give the required voltage and do away with the transformer.

Lower than 2 to 4 Hz is ideal. In there you could put things like a publishing date and a copyright notice, keywords, a table of contents, social link URLs written in full as normal text instead of just blue words in the article, etc.


Email Required, but never shown. I can use it, no? Every component really does make a noticeable difference choice is subjective for example; it seems people like the foil in oil because the oil allows movement which causes distortion in 2nd order harmonics, which people perceive as warm. Would be awesome to have links to getting the chosen audio components too.

I am having a hard time finding X7R Ceramic resistors. Thank you for your excellent work! Great article, thanks a lot.

My design uses a PCB to hold 3 paralleled s i. It explained so much. After some adjustment, I can get the DC offset of each to about 9mV, because this is a pm3886 pull configuration, the DC offset at speaker terminal would be very close to 0mV. Broadcast radio frequencies in the USA are:. Also, some airflow spacing is needed around the caps. Will this work at all?

The best way to determine values for R f2 and C f is with circuit simulation software such as LTSpice.

True nice complete job! Circuit Basics on April 1, at 2: