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Chip Amps Amplifiers based on integrated circuits

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Old 18th December 2012, 06:10 PM   #31
Philfr is offline Philfr  France
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you are right John..
It's not a "normal" price for it, about 7/8 usd on Ebay !
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Old 18th December 2012, 06:15 PM   #32
Mooly is offline Mooly  United Kingdom
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I looked at the price from CPC/Farnell and its £2 ish without VAT.
TDA2050V - STMICROELECTRONICS - AMP, AUDIO, 25W, 2050, PENTAWATT | CPC

That's a guaranteed STM part.
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Old 18th December 2012, 06:44 PM   #33
Philfr is offline Philfr  France
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Thank's Mooly,
good idea, also available from UK and better shipping..
I found in Germany too :
eBay | TDA2050V HI-FI Audio Power Verstärker 32W TDA2050
It's secure too..
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Old 18th December 2012, 06:52 PM   #34
Mooly is offline Mooly  United Kingdom
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I would be wary of ebay (says me who doesn't have a Paypal account and has never used ebay ).Too many tales of fake parts... beware.
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Old 18th December 2012, 06:52 PM   #35
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Location: Homeless, sweet homeless.
At present, I'm using 4 TDA2050 ICs for bi-amping with 2 way active crossover setup and a preamp along with floor stander speakers.
All I can say is that I simply love their sound.
( The photos are in my signature )
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Old 18th December 2012, 08:21 PM   #36
Philfr is offline Philfr  France
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"says me who doesn't have a Paypal account and has never used ebay"
Me
But for about 10 euros I'm willing to take the risk, for more no..
Finally I found in France LM1875, but on Ebay too
In fact diy is very easy, if you find the components you expect !
I'll take the time to look again..
At this time, the best way is Farnell.
@ csom, nice project
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Old 19th December 2012, 05:49 AM   #37
Philfr is offline Philfr  France
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Hi all,
Lucky day, I found TDA2050 on a good french online shop !
It's on stock and I can order this.
Now, question is : may I can use the schematic in single rail for LM1875 with TDA2050.
This two chips seems similar ?
While I believe this page :
Single Chip 25W Amplifier (Project 72)
Thank's..
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Old 19th December 2012, 06:08 AM   #38
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Location: wigan
Quote:
Originally Posted by Philfr View Post
More details about sub, it's a MLTL Bipole with two 5' drivers in phase and wiring in parallel, efficiency is about 95 db (at 1 meter and taking into account effect walls)..
For my new small listening room, 5/10 watts are good enough..
I use a bipole speaker system too. Quoted sensitivity is 91 Db 1 Watt 1 Meter. They are very much suited to low power amplifiers . have great bass weight and depth but also are very dynamic because of the small drivers very articuate too..... Chip amps and bipoles are a good combination LOTS! of bang per buck.. LOTS! Good for battry life too
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Old 19th December 2012, 06:54 AM   #39
Mooly is offline Mooly  United Kingdom
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Follow the circuit and application on the data sheet, either figure 1 or figure three depending on whether you want dual or single rail. In figure 3, R1 and R2 connect to R3 and not C1 (the little dots are not very clear on the pdf)

http://www.datasheetcatalog.org/data...onics/1461.pdf
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Old 19th December 2012, 07:40 AM   #40
Philfr is offline Philfr  France
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Thank's Mooly, I note your comment..
So it looks good for the future
At this time I want shaw you a complete schematic of full system, to see if nothing was wrong about supply :

Click the image to open in full size.
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