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The capacitor is there to filter any radio frequencies picked up by the chassis.

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The components on the PCB layout match the schematic above. Talk to you next lm388t6f. Thanks a lot for sharing this wonderful job. Dave on September 6, at I used single sided PCB, but tried sticking to your layout as closely as possible and changed some components — especially the Mundorfs for something readily available and a bit cheaper.

The main system ground connects to the ground protection circuit discussed belowwhich then connects to the chassis. Do you think you could post the exhaustive list, brandd and referenced of the components?

Email me new tutorials and very occasional promotional stuff: George on October 4, at 3: Great job, very well explained. I also really like how you supplied the calculations for determining the size of the components. There are two schools of thought here. If ml3886tf currents at the non-inverting input pin 9 and the inverting input pin 10 are different, a voltage will develop between them. The resistor reduces this current and breaks the ground loop.

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After setting the gain, the next step is to balance the input bias currents by choosing values for R in and R b:.

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

A single chip for each tweeter and a parallel pair for the woofers. The sound is fantastic, however I can not reach it but the power is far from expected. Robert on July 21, at 9: Truly fantastic lm3886tc you got here! 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.

Great project; thank you for sharing. The video at the beginning of the post will give you an idea of what it sounds like.

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

Or is it just because the part is only manufactured like that by Mundorf? The datasheet gives a value of 2. Hopefully my reply helps, if not… whatever.

Thanks a million for the detailed top quality guidance.

Your efforts really appreciated…. Does anyone have a rough cost of building this amp??

So the silkscreen is correct…. Thank you for this really great article. Patrick on December 21, at 5: I would like to better understand how to set a value for low-frequency cutoff at the feedback loop.

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Thanks for your answer. Thank you for your excellent work on this guide.

A lot of effort obviously went into this. The PCB has 2 holes for the diodes, but the parts list specifies a 3 pin diode. With the knowledge and the tools available on this site I have built very modified boards.

Bob Pendergast on April 3, at Jimmy George on August 23, at The two Thiele networks are located close to the speaker output terminals. 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 catasheet distortion in 2nd order harmonics, which people perceive as warm.

Hi, I really enjoyed reading this! Audio input cables running from the source to the amplifier chassis can pick up interference. Could you please add a print stylesheet to the website, where all the unnecessary stuff navigation, newsletter subsciption, social links, footer, etc is hidden and the content column datashee full width?

You seem to know what you are doing as well as having a lot of experience. In the lm38886tf everything is equal to the circuit. I do believe a carefully planned lm using quality not expensive components with suitable source, volume control feeding decent speakers is difficult to beat.