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Old 4th May 2011, 05:49 AM   #1
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Question 5.1 CHANNEL AMP WITH 2xLM1876,1xLM4782 is it possible ?

Hi Diy's


this is my first diy

I wanna build 5.1 channel with 2xLM1876 for "rear" and "front" channels.
And 1xLM4782 is a 3 channel amp, 2 channels bridged for "Sub woofer" and 1 channel for "center".

Is it possible ...?

if it is possible then plz any one advice abt circuit diagram and power supply
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Old 4th May 2011, 07:23 AM   #2
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Default can i use this circuit diagram

LM1876 is a 2xLM1875
can i use the attached circuit diagram for my project.. ?

i get the circuit diagram from elliott sound products



and split power supply too
Attached Images
File Type: gif lm1875.gif (4.0 KB, 397 views)
File Type: gif lm1875 power supply.gif (2.5 KB, 385 views)
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Old 4th May 2011, 08:10 AM   #3
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i wants to be circuit diagram for amplifier circuit description for I.C_TDA-7375a
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Old 4th May 2011, 08:21 AM   #4
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Post circuit

LM1876 is a 2x1875 so can i use this circuit ??
i get it from "Elliot Sound Products"
Attached Images
File Type: gif lm1875.gif (4.0 KB, 375 views)
File Type: gif lm1875 power supply.gif (2.5 KB, 371 views)
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Old 4th May 2011, 09:39 AM   #5
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By the time you add the costs of enclosures, heatsinks and transformers and PSU caps, you are probably way over the cost of a budget AV receiver, offering things like remote control and all kinds of bells and whistles.

If cost is no objection, you can certainly do this, but start with the costs of the items mentioned, building up the PCB's is cheap in comparison.
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Old 4th May 2011, 11:43 AM   #6
diarav is offline diarav  India
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Location: Bangalore India
Toxicaudio: You cannot use Rod Elliots LM1875 circuit for wiring LM1876. The pinouts are different.
Your project is not impossible, but will need a lot of work and preparation as "digit" pointed out in his post.
I have been working on a project to build a 5.1 amp using 6 LM3886 and I have redesigned it multiple times over the last 4 years. It is still not ready.
Best of Luck on your project.
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Din
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Old 4th May 2011, 12:34 PM   #7
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Quote:
Originally Posted by diarav View Post
Toxicaudio: You cannot use Rod Elliots LM1875 circuit for wiring LM1876. The pinouts are different.
Your project is not impossible, but will need a lot of work and preparation as "digit" pointed out in his post.
I have been working on a project to build a 5.1 amp using 6 LM3886 and I have redesigned it multiple times over the last 4 years. It is still not ready.
Best of Luck on your project.
Last 4 years Ohh that's great u r really great
I appreciate ur patience

Yes u r right pinnouts are different

i get circuit from national semi conductors

Now the problem is chip availability

i am livin in small town near vijayawda, andhrapradesh (INDIA)

where can i get them ???

any price details ?? (LM1875, LM1876, LM3886) to order them

searched on local shops they even don't know those are audio amps

please advice ..................
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Old 7th May 2011, 05:46 AM   #8
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Welcome to RS Online

R382 for you sir.
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Old 7th May 2011, 07:12 AM   #9
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THX u very much DIGITS
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Old 7th May 2011, 07:23 AM   #10
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Ohhh guys i need to creat new thread on TDA2030a
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