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Chip Amps Amplifiers based on integrated circuits

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Old 29th August 2013, 08:50 AM   #41
Mihkus is offline Mihkus  Estonia
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My opinions so far:
LM4766- worst PCB design, most parts good, amplifier IC, fake.
TDA8920BTH board, the Juan Jing one, pretty good design, sounded pretty good but most parts were chinese slave made.

IRS2092, good design, did not work with original parts, had to buy new ones. Driver and output transistors.

Mostly they are pretty good, but i rather design my own and get parts from digikey or TME.
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Old 29th August 2013, 09:35 AM   #42
AndrewT is offline AndrewT  Scotland
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If you want to design your own PCB, then you must understand what allows a PCB to work properly.
The same applies to modifying an existing PCB to improvement the performance of the circuit.

If you need to learn, then build anything and learn after that.
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Old 29th August 2013, 10:43 AM   #43
Mihkus is offline Mihkus  Estonia
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Quote:
Originally Posted by AndrewT View Post
If you want to design your own PCB, then you must understand what allows a PCB to work properly.
The same applies to modifying an existing PCB to improvement the performance of the circuit.

If you need to learn, then build anything and learn after that.
I havent design many amps but YOU have told me alot, I have built few amps, and they sound wonderful.

Your the superman of this forum...
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Old 12th March 2016, 10:19 AM   #44
verde57 is offline verde57  Romania
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Which one is better schematic wise?
A Pair DC 35V 55V 470uF 100V 200W 200W Superpower Amplifier Board vs Dartzeel | eBay
2pcs One Set 2X120W 8ohm Toshiba TTC5200 TTA1943 Amplifier No Heatsink | eBay
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Old 13th March 2016, 08:46 AM   #45
verde57 is offline verde57  Romania
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please I need to buy on of these kits that work with 55V DC, which one?
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Old 13th March 2016, 09:06 AM   #46
AndrewT is offline AndrewT  Scotland
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The first link is to a site that does not know how to tell the truth.
Don't trust it.

The second is much closer to advertising reliable targets.
A 2pair 1943/5200 output stage has a maximum (reliable) output of around 100W.

The recommended 50Vdc supply will achieve ~100W into 8ohms speakers.
Alternatively use a 28+28Vac transformer and your maximum power output target becomes 100W into 4ohms, the 1943/5200 might even work well @ 120W into 4ohms fed with a 30+30Vac transformer.
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Old 13th March 2016, 10:06 AM   #47
forr is offline forr  France
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Verde57,

Forget the first link.

The "Toshiba" circuit should have a constant current source instead of R20.
A fact encouraging to not get it.
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Old 13th March 2016, 02:34 PM   #48
verde57 is offline verde57  Romania
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Thanks, any other suggestions for amps payable thru paypal are greatly appreciate.
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