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Chip Amps Amplifiers based on integrated circuits

LM1875 in parallel configuration and used in a composite amplifier.
LM1875 in parallel configuration and used in a composite amplifier.
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Old 28th November 2020, 04:54 PM   #611
kokoriantz is online now kokoriantz  Lebanon
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Hi Chris. Watch these LM1875 IC audio amplifier board kit test and review - YouTube
LM1875 audio amplifier kit ULTIMATE power test - YouTube
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Old 28th November 2020, 06:37 PM   #612
chermann is offline chermann  Austria
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Hi


thx...

i know that videos...that is in the "story" of the ebay kit thread...
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Old 30th November 2020, 08:49 AM   #613
kokoriantz is online now kokoriantz  Lebanon
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Hi FF. Just a quick question. On post 567 you posted voltage clipping of the genuine but with resistors on the inputs. What it looks like without. Is the simulated image with 1k feedback 10khz resemblant? Supply +/-21v
sar with 200ma.JPG
With 22k/2.2k I get this for 10khz.
22 2.JPG

Last edited by kokoriantz; 30th November 2020 at 09:13 AM.
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Old 30th November 2020, 09:52 AM   #614
kokoriantz is online now kokoriantz  Lebanon
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Wrong picture for 22/2.2
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Old 12th December 2020, 02:10 AM   #615
denbret is online now denbret  Canada
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Hi everyone,

Does anyone know the maximum watts in 4 and 8 ohms with 2 LM1875 in parallel?

Denis
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Old 12th December 2020, 02:23 AM   #616
asuslover is offline asuslover  Romania
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2 chips are paralleled : the amp will deliver in 4 ohms double than what one chip would deliver in 8 ohms, and in 8 ohms it will deliver double than one chip would deliver in 16 ohms.

Last edited by asuslover; 12th December 2020 at 02:26 AM.
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Old 12th December 2020, 02:18 PM   #617
denbret is online now denbret  Canada
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Thanks for the information !
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Old 25th December 2020, 07:18 AM   #618
nirupambhowmick is offline nirupambhowmick  India
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Quote:
Originally Posted by kokoriantz View Post
This was the picture of fake ones. Does the original resemble to this?
Yes! Don't trust on eBay.
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Old 25th December 2020, 07:53 AM   #619
nirupambhowmick is offline nirupambhowmick  India
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Default Authentic natsemi 1875

The marking(number and latters) colour has changed from white to brown, laser marked maybe. Beware of fake lm1875 from eBay or chinese vendors, fake white colour version is also available there. I never heard a 1875 amp so this is the first time i placed an order for it, definitely genuine lm1875t!
Attached Images
File Type: jpg NatSemi 1875.jpg (54.1 KB, 57 views)

Last edited by nirupambhowmick; 25th December 2020 at 08:05 AM.
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