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Chip Amps Amplifiers based on integrated circuits

LM1875 2.1 kit?
LM1875 2.1 kit?
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Old 25th January 2013, 11:44 PM   #1
KyleinCowichan is offline KyleinCowichan  Canada
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Default LM1875 2.1 kit?

Hello,

I see there's some very cheap 2.1 channel amplifiers on Ebay based on the LM1875. I searched the forum and I don't see anyone commenting on them. Has anyone here tried one? The appear to have the rectifier circuit on-board.

For example: LINK

Kyle

Last edited by KyleinCowichan; 26th January 2013 at 12:53 AM.
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Old 26th January 2013, 11:02 AM   #2
AndrewT is online now AndrewT  Scotland
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I would not choose to buy a complete kit of chips & passives from the Far East.
I have bought PCBs from there but I find the quality very variable.
Copper delamination is the biggest problem, second worst is temperature tolerance of the mask.
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Old 26th January 2013, 11:08 AM   #3
hansibull is offline hansibull  Norway
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I just ordered the "bigger brorther" on ebay, a 2.1 amplifier with 2x68W for tweeters and midranges, and 160W for the sub. I'm looking forward to test it out!
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Old 26th January 2013, 11:59 PM   #4
KyleinCowichan is offline KyleinCowichan  Canada
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Quote:
Originally Posted by AndrewT View Post
I would not choose to buy a complete kit of chips & passives from the Far East.
I have bought PCBs from there but I find the quality very variable.
Copper delamination is the biggest problem, second worst is temperature tolerance of the mask.
Hi Andrew,

Point taken. For the low prices I am willing to experiment.

Kyle
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Old 27th January 2013, 12:01 AM   #5
KyleinCowichan is offline KyleinCowichan  Canada
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Quote:
Originally Posted by hansibull View Post
I just ordered the "bigger brorther" on ebay, a 2.1 amplifier with 2x68W for tweeters and midranges, and 160W for the sub. I'm looking forward to test it out!
Please post your impressions!

I messaged one of the Ebay seller for the item in my first post and they said they'd include instructions for changing the crossover frequency of the sub with the purchase.

Kyle
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Old 28th January 2013, 03:10 PM   #6
piazzafatb is offline piazzafatb  Puerto Rico
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