High-End LM1876 Quad Amplifier Gainclone using High Quality PCB

Creating a power amplifier circuit for the high-end class AB using the LM1876 IC is in great demand among audio amplifier lovers. Amplifiers using the LM1876 IC have power up to 20W per channel, while the LM1876 IC has 2 input outputs so that it can output 20W + 20W per IC, with very low distortion compared to other amplifier chips. This LM1876 IC is the same as the LM1875 IC with the same audio quality produced. The difference is only in the number of output inputs and also features a mute and standby feature on the LM1876 IC.

You can use this amplifier for home theater or audiophile amplifiers, or it can also be applied to system power amplifier circuits 2.1 Stereo + Subwoofer using 2 ICs. And on this occasion, I will share the circuit and the PCB layout file for the LM1876 Quad amplifier circuit or 4 channel power amplifier using 2 ICs. Besides that, I have also completed the preamplifier circuit along with the power supply regulator for the IC op-amp. The Op-Amp IC that I use is dual type. You can use several types of op-amps such as 4558, NE5532, TL082, etc. Recommended power supply using +-25V with 5A Current.

Below is the LM1876 series of quad amplifier circuits:

Part List

-->

1	LM1876TF	U1,U2	TF15B
2	1k	R1,R3,R4,R5,R11,R13,R14,R15,R37,R38	PKG-0.25W RESISTOR
3	47k	R2,R6,R12,R16	PKG-0.25W RESISTOR
4	10uF	C1,C2,C9,C10	CAP-D5.0XF2.0
5	1000uF	C3,C4,C11,C12	CAP-D16.0XF7.5
6	1uF	C5,C6,C13,C14	CAP-CBB-23.0*8.0
7	100nF	C7,C8,C15,C16	CAP-CBB-12.0*4.5
8	4.7Ω	R7,R8,R17,R18	AXIAL-0.8
9	22k	R9,R10,R19,R20,R24,R26,R31,R33	PKG-0.25W RESISTOR
10	5532	U3,U4	DIP08
11	10k	R21,R22,R23,R25,R28,R29,R30,R32	PKG-0.25W RESISTOR
12	50k	R27,R34	RES-ADJ_3296W
13	MKP 250V 2.2uF	C20,C18,C17,C19	CAPACITOR-MKP250V-2.2UF
14	100NF	C21,C22,C23,C24	100NF, 63V CAPACITOR
15	AKL701_3_15	X1	AKL701_3_15
16	TB 5MM	OUT4,OUT1,OUT2,OUT3	TERMINAL_BLOCK_2P_5
17	BD140_C20604	Q1	TO-126
18	BD139	Q2	TO-126
19	Z12V	D2,D3	ER_ZENER_12V_D0-35
20	22uF	C35,C36	CAP-D6.3XF2.5
21	100uF	C37,C38	CAP-D6.3XF2.5
22	100n	C39,C40	100NF, 63V CAPACITOR
23	XHB-2A Connector	P1,P2,P3,P4	XHB-2A
24	1M	R39,R40,R41,R42	PKG-0.25W RESISTOR

PCB Layout LM1876 Power Amplifier Quad Gainclone

How to get High-Quality PCB from JLCPCB 

First, you must download the Gerber file at end of this post.

If you have downloaded it via google drive with the .rar format, please visit the JLCPCB site here:https://jlcpcb.com/m

Here is the website homepage of JLCPCB, next login to your account or register if you don't have JLCPCB account.

If you have already entered the account, click quote now. And then upload the Gerber Files

Then select your PCB options such as number of PCBs to be ordered, PCB thickness, copper thickness, masking color etc.

Then click save to cart, and checkout securely, and you will be redirected to the page to fill in the shipping address, and shipping options and payment options. You can use a credit card or PayPal to pay it.

The following is an example of a PCB that I have ordered from JLCPCB with a red double layer masking PCB, HASL (with Lead) surface finish.

Using a high-quality PCB from JLCPCB and using the Audio Grade component makes it possible to get good results for this LM1876 Power Amplifier. Apart from good sound results we also get a cool look too.

Amplifier Test

Download
Schematic LM1876 Quad Amplifier PDF
Gerber Files Power Amplifier Quad LM1876 High-End Audio
Bill of Materials Quad Gainclone Amplifier LM1876 .CSV