Comments on: Build a Great Sounding Audio Amplifier (with Bass Boost) from the LM386 http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/ Raspberry Pi, Arduino, and DIY Electronics Projects and Tutorials Fri, 20 Apr 2018 22:07:56 +0000 hourly 1 By: Rafael http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-24665 Fri, 13 Apr 2018 14:39:11 +0000 http://www.circuitbasics.com/?p=843#comment-24665 Hi,
i made the exact same circuit (A GREAT SOUNDING LM386 AUDIO AMPLIFIER). I tested it and it worked! After doing so i decided to make the other channel (stereo sound), and replicated the circuit on the other side of the board. The power supply is a 12V, laptop supply. Such PS is feeding both circuits in parallel.

However, neither of both circuits are working anymore (the circuit no. 1 worked before and circuit no. 2 never worked).

What am I missing?

]]>
By: ralph leynes http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-24113 Tue, 10 Apr 2018 14:12:28 +0000 http://www.circuitbasics.com/?p=843#comment-24113 I really enjoyed this tutorial and this would really help me a lot in my experiments. Just wondering will this circuit still work if I increased the number of speaker to 6-8 speakers? And what do I have to do to make it work with 6-8 speakers? Sorry if this question seems idiotic to you xD I am just a beginner in this field. Thank you 🙂

]]>
By: Arslan http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-23491 Tue, 03 Apr 2018 12:39:25 +0000 http://www.circuitbasics.com/?p=843#comment-23491 What are the specifications of output speaker?

]]>
By: Kolton http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-22841 Fri, 23 Mar 2018 17:23:23 +0000 http://www.circuitbasics.com/?p=843#comment-22841 If you were to put this in a copper layout what would it look like. Using this for my school project.

]]>
By: Prince http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-22691 Wed, 21 Mar 2018 16:02:31 +0000 http://www.circuitbasics.com/?p=843#comment-22691 Can we use electrolytic capacitor instead of polypropene capacitor ?

]]>
By: peter http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-21982 Sat, 10 Mar 2018 07:02:42 +0000 http://www.circuitbasics.com/?p=843#comment-21982 Boss, this is the best circuit i have ever seen. it has really been helpful. I am an undergraduate from Ghana and am working on a similar circuit. Thanks a lot.

]]>
By: Murat http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-21859 Thu, 08 Mar 2018 14:59:25 +0000 http://www.circuitbasics.com/?p=843#comment-21859 good works:
tda2050 or tda2030 single psu bridge amplifier circuit available?

]]>
By: Robert http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-19542 Thu, 08 Feb 2018 02:27:22 +0000 http://www.circuitbasics.com/?p=843#comment-19542 It is my first amplifier, I’m it is a mess but whatever, is working, thanks for sharing guys you are the Best. I’m truly happy xD.

]]>
By: shah http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-19495 Wed, 07 Feb 2018 13:35:02 +0000 http://www.circuitbasics.com/?p=843#comment-19495 i want to know what is the function of using R1 and C2 in parallel with the load .
Ihave searched it alot but can not find anything useful .

]]>
By: Segway http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-18766 Wed, 31 Jan 2018 10:47:16 +0000 http://www.circuitbasics.com/?p=843#comment-18766 I was in search of such kind of detailed tutorial. Thank you very much for sharing.

]]>
By: Dave B. http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-18746 Wed, 31 Jan 2018 07:03:07 +0000 http://www.circuitbasics.com/?p=843#comment-18746 Can anyone make Gerber’s of the “386 with Bass” circuit, would be nice to have PCB’s of this.

]]>
By: NOME http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-16559 Sat, 30 Dec 2017 13:43:21 +0000 http://www.circuitbasics.com/?p=843#comment-16559 Hi I was wondering about this amp are those mono amps?
and also due to you used the Lm386N-1 will this IC work with 16-32 ohm speakers?

]]>
By: Velyx http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-16320 Thu, 28 Dec 2017 15:43:07 +0000 http://www.circuitbasics.com/?p=843#comment-16320 Where is the PCB layout / PCB diagram?

]]>
By: Adinol http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-15696 Sat, 23 Dec 2017 19:56:51 +0000 http://www.circuitbasics.com/?p=843#comment-15696 You misunderstood the previous comment. You have to connect a 10µF 25V with negative pole connected to pin 3 of LM386. This means the positive pole of this cap is connected to the source of your signal, for example, a guitar. Then a 1K resistor from pin 3 of the LM386 to ground. Hope this makes is clear, without a revised schematic.

]]>
By: Sanath http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-15602 Sat, 23 Dec 2017 03:44:26 +0000 http://www.circuitbasics.com/?p=843#comment-15602 What are the voltage of the electrolytic and wattage of reaistors

]]>
By: Ryan http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-15583 Fri, 22 Dec 2017 19:57:45 +0000 http://www.circuitbasics.com/?p=843#comment-15583 In other words, connect pin 3 of the IC to ground with a capacitor and a resistor in series? Thank you in advance.

]]>
By: Akmal http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-14396 Wed, 13 Dec 2017 09:59:38 +0000 http://www.circuitbasics.com/?p=843#comment-14396 Sir I have 4 ohm 2speakers so what amplifier I should use

]]>
By: Meychele http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-13580 Sat, 02 Dec 2017 22:23:54 +0000 http://www.circuitbasics.com/?p=843#comment-13580 Hello,

I am working on a research paper for my senior design class at UCF. Would it be okay to use your LM386 audio amplifier with bass boost figure as a reference design in the paper? The figure will be cited appropriately. Thanks.

]]>
By: VAneza ybanez http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-13103 Sat, 25 Nov 2017 06:45:10 +0000 http://www.circuitbasics.com/?p=843#comment-13103 It’s a very nice tutorial. Can I ask for the flow of the circuit? Thanks.

]]>
By: givesunlight.com http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-11532 Tue, 31 Oct 2017 10:24:16 +0000 http://www.circuitbasics.com/?p=843#comment-11532 In today’s dynamic economy, changes occur rapidly so you have to fit in. You’ve likely heard that the roadside assistance plan is a good idea, but
when you imagine it’s just about getting towed, you must have a closer look.
There are tensions about the huge and uncontrolled
dues which can be piling up around the account of varied dues
taken.

]]>
By: news world war z 2 http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-11512 Tue, 31 Oct 2017 04:20:26 +0000 http://www.circuitbasics.com/?p=843#comment-11512 However, after one donation, you are able to donate again only after 3
months when your body has regained the donated blood.
Think “news” and make certain you look like news articles with pictures and
all. You must realise that when you open a brand new Forex position that you simply are, the truth is, trading currency
pairs as being a single unit.

]]>
By: fanzlive.com http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-11488 Mon, 30 Oct 2017 21:14:58 +0000 http://www.circuitbasics.com/?p=843#comment-11488 Many persons who are new to the world wide web, or perhaps
are merely going through the opportunity to start an online business question when it
is really vital to their success to get a blog. Without much effort at all you may
be a whole lot of more educated around the subject.

Parents will get the animated or children’s movies at will, and also the kids can be quiet for a
couple of hours.

]]>
By: Ryan http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-11261 Fri, 27 Oct 2017 11:54:15 +0000 http://www.circuitbasics.com/?p=843#comment-11261 Will it work with a guitar with two humbuckers?

]]>
By: Lineman2208 http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-11109 Wed, 25 Oct 2017 16:58:41 +0000 http://www.circuitbasics.com/?p=843#comment-11109 A few questions. The bass boost and the gain pots are not connected to ground. Why? Also can I double this and make stereo audio?

]]>
By: Thempleton Aart http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-9913 Thu, 12 Oct 2017 16:57:44 +0000 http://www.circuitbasics.com/?p=843#comment-9913 Decoupling means disconnecting two electronic circuit stages (against cc) from each other.
C4…7 aren’t for decoupling. They are there to short spikes and RF to ground. So they have to be considered as filters.

On the presented circuits an important capacitor is missing, the source input cc decoupler.
As in this circuit the input is directly connected to a op-amp, input decoupling is a must.
Risks are eventual continuous current coming from the source blows the LM386 IC, or worst case a problem with this amplifier circuit, causing continuous current flowing to the source, makeing hot-dogs of your connected smart phone. 😉
Never forget to decouple audio inputs.
In this case 10µF 25V with negative pole connected to pin 3 of LM386 and a 1KOhm resistor from ground to the same pin will suffice.

Hoping to be of some help.

Regards.

]]>
By: Mark http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-9608 Mon, 09 Oct 2017 11:35:07 +0000 http://www.circuitbasics.com/?p=843#comment-9608 Hi, What type of capacitor is the blue 470pF ? can i use a different type ?

]]>
By: geofrey http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-9187 Wed, 04 Oct 2017 16:51:56 +0000 http://www.circuitbasics.com/?p=843#comment-9187 have a problem with bass expander boosting

]]>
By: Peter http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-9172 Wed, 04 Oct 2017 11:54:38 +0000 http://www.circuitbasics.com/?p=843#comment-9172 The 470pF capacitor is shown wrong in the diagram. It should be between pin 3 and GND, not pin 2.

]]>
By: Rajesh http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-8466 Fri, 22 Sep 2017 16:35:14 +0000 http://www.circuitbasics.com/?p=843#comment-8466 I want to build a amplifier circuit for my new pair of 240watts speakers for perfect sound quality.please help me details .I’m just a bigener

]]>
By: Cody http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-8414 Thu, 21 Sep 2017 15:40:35 +0000 http://www.circuitbasics.com/?p=843#comment-8414 Hey 😀 I build this circuit and it is AMAZING but my LM386N-1 is getting really hot and i mean VERY HOT. Is it normal or it is feeding to much power to the speaker or something? PS:I used 5v USB power for it.

]]>
By: Jay http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-6682 Mon, 28 Aug 2017 17:54:47 +0000 http://www.circuitbasics.com/?p=843#comment-6682 Hi, could you let me know what your output Amperage and Voltage is? I’m assuming with the LM386N-1 you’re prob around 250-325mW but that seems way too low to find a speaker to attach too.

]]>
By: Suman Dutta http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-5882 Sat, 12 Aug 2017 06:26:38 +0000 http://www.circuitbasics.com/?p=843#comment-5882 what should be the maximum watt of the speaker in LM-386 Model. Shall I get good quality sound for laptop?

]]>
By: RickS http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-4719 Fri, 21 Jul 2017 22:38:51 +0000 http://www.circuitbasics.com/?p=843#comment-4719 How can you possibly know this (I just watched your youtube video) ?

They don’t teach this in school (Audio/Electrical Engineering) !

“The arm bone is connected to the, shoulder bone ?)

If I had your knowledge, what I am building would be, for the $$$, the best Audio System in the World !!

But since I don’t, it will be the second best Audio System in the World !!!

And a LM-386 Amplifier will play a small role within it…

Rick – SoCal

]]>
By: Adinol http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-4366 Mon, 10 Jul 2017 09:12:14 +0000 http://www.circuitbasics.com/?p=843#comment-4366 Without trying to sound negative, in any way, this is a bit like saying, what’s wrong with my car, it makes finny noises?

If I were you I would rebuild the entire circuit with all the components replaced (including the chip and the speaker). If the goal is to have this done ASAP it doesn’t matter what’s wrong, as long as you get a working circuit.

Hope this helps.

]]>
By: Mohit r http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-4365 Mon, 10 Jul 2017 08:25:31 +0000 http://www.circuitbasics.com/?p=843#comment-4365 Kindly help me
I’ve built the circuit Im experiencing lots of noise
I triple checked the circuit
I’m using a 25 ohms speaker is that the problem?
I have only 4 days from my deadline….

]]>
By: Roger http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-4252 Thu, 06 Jul 2017 12:41:08 +0000 http://www.circuitbasics.com/?p=843#comment-4252 A 470 pF capacitor between the positive input signal and ground, which filters radio interference picked up by the audio input wires.
Hello sir!
I can’t see the above in the circuit diagram.
It connects between input negative and ground isn’t it?

]]>
By: Pulkit Sharma http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-4209 Tue, 04 Jul 2017 18:58:30 +0000 http://www.circuitbasics.com/?p=843#comment-4209 6 or 8 ohm speakers

]]>
By: Colby http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-4168 Mon, 03 Jul 2017 14:15:21 +0000 http://www.circuitbasics.com/?p=843#comment-4168 Hi, Is this amplifier have enough power to fill a 4m x 4m room?

]]>
By: Ola http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3859 Sat, 24 Jun 2017 11:16:12 +0000 http://www.circuitbasics.com/?p=843#comment-3859 Please send me the schematic diagram .
Rayjat51@gmail.com

]]>
By: TULOA http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3692 Thu, 15 Jun 2017 21:47:48 +0000 http://www.circuitbasics.com/?p=843#comment-3692 Apparently this circuit will not support any AC Adapters for 12V without some form of change to the circuit. You get a constant hum if you do and I have not yet found a way to fix this. Best to apparently just use a 12V battery or batteries in series if you need any higher than on here.

]]>
By: Hemant chaurasia http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3648 Mon, 12 Jun 2017 11:43:17 +0000 http://www.circuitbasics.com/?p=843#comment-3648 Sir,
what kind of speaker we should use.

]]>
By: anil http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3601 Thu, 08 Jun 2017 17:44:53 +0000 http://www.circuitbasics.com/?p=843#comment-3601 great amp …i want to ask you ..why did you connected a 470pf capacitor’s both pin on Ground..would?? you tell me plz..

]]>
By: Harold http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3389 Fri, 26 May 2017 23:43:18 +0000 http://www.circuitbasics.com/?p=843#comment-3389 Sorry! BTW the extended second circuit was great and worked the first time I fired it up. It is just the added bass control that I am having a challenge with…

]]>
By: Harold http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3388 Fri, 26 May 2017 23:41:07 +0000 http://www.circuitbasics.com/?p=843#comment-3388 I am having a problem with the extended bass circuit. It keeps distorting the signal and squealing, or cutting it out all together.

Any thoughts?

]]>
By: Philip http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3313 Sun, 21 May 2017 11:38:35 +0000 http://www.circuitbasics.com/?p=843#comment-3313 Hi,

Excellent tutorial.
If I was to replace the 3.5mm jack for a guitar jack would this work ok as a guitar amp?
I’m sure it would but wanted to see if you could see any problems?
Thanks.

]]>
By: Andrew Gravlin http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3216 Mon, 15 May 2017 21:36:39 +0000 http://www.circuitbasics.com/?p=843#comment-3216 Apparently also my other comment got lost… Any changes I would otherwise need to make for a 12V DC adapter? It is a 12v 400mA adapter from an old shaver. It currently has alot of hum on the line when its in use.

]]>
By: TULOA http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3215 Mon, 15 May 2017 21:16:58 +0000 http://www.circuitbasics.com/?p=843#comment-3215 Question for ya… My 9V in the circuit for the second setup is getting pretty hot. Is this normal or is something else going on?

Im using your: “A GREAT SOUNDING LM386 AUDIO AMPLIFIER” circuit.

The only change I made was a suggestion elsewhere to bump the capacitor from Pin 3 of the lm386 to the ground to a 50uF capacitor to help reduce more hum on the output. I am doing so to attempt to convert from 9v to 12v.

]]>
By: Tuck http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-3145 Sat, 13 May 2017 01:07:18 +0000 http://www.circuitbasics.com/?p=843#comment-3145 You could use a small boost converter.

]]>
By: Casper http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-2928 Fri, 05 May 2017 00:09:33 +0000 http://www.circuitbasics.com/?p=843#comment-2928 Hi, thanks for this post. I just want to ask if this is an active or passive loudspeaker?
Many thanks.

]]>
By: Victor Faucheret http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/#comment-2690 Mon, 24 Apr 2017 05:20:22 +0000 http://www.circuitbasics.com/?p=843#comment-2690 This is the best project with an LM386 I have seen in the Web, for many reasons – very professional and cool, and yet easy for newbies. I have been trying to have the parts list sent to my e-mail address but to no avail. I just don’t get it. Would you please help? Thanks in advance.

]]>