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HAYK
The original TDA7293 is sold for $10 from mainstream vendors. 2 years ago when I looked last, they had ST logo unable to distinguish a copy from original but defective. Nowadays I see without logo with Hugh quantity availed for $1 to be sure they aren't defective original ones.
I ordered 2 pairs from 2 vendors to see what they worth but I will receive them in 1½ months.
These boards sold for $3, certainly are functioning but with what quality?
On youtube, I find several audio tests but they are with simple music mostly Indian as this compared to probably copy LM3886.
I ordered 2 pairs from 2 vendors to see what they worth but I will receive them in 1½ months.
These boards sold for $3, certainly are functioning but with what quality?
On youtube, I find several audio tests but they are with simple music mostly Indian as this compared to probably copy LM3886.
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I recall back in the 90s when I was an engineer in UK, I couldn't get TDA7294 at a sensible price in 1k volume from any UK distributor. We ended up buying from a Taiwanese distributor at around $2 a pop. The discrepancy between Eastern and Western prices is very significant, quite aside from the issue of fakes.
Very true, but first you have to make sure that the source is good. I and most of us(it ssems) dont recognise Alixpress or such vendors as a reliable source, its more like a gamble. I remember i got lm3886 from a local retailer at less than $3 USD each(10 piece lot), original of course because i experienced the beast.
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HAYK
There are some honest vendors on Ali that they give you the choice of high cost original and cheap copy which may give the option to return it if the original in not received.
This chip is over 20 years old technology and the patents in public domain. I am expecting as the Chinese TDA2050-LM1875 new design superior to the original that this chip has also got enhanced.
This chip is over 20 years old technology and the patents in public domain. I am expecting as the Chinese TDA2050-LM1875 new design superior to the original that this chip has also got enhanced.
If they give you options then thats a good thing. I'm not sure about the second part, also then the part will not be the same.
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There's a TDA7293 board from Cirmech available on AliExpress, eBay, etc.
This board sounds very good; everything appears to be original. Some of the capacitors are 35V types. If the board is supplied with the specified voltage of 2x28V AC, these capacitors will burst. This amplifier runs very well with a maximum voltage of 22V.
https://www.ebay.de/itm/40323871287...IkhxjHJTLq&var=&widget_ver=artemis&media=COPY
There's a TDA7293 board from Cirmech available on AliExpress, eBay, etc.
This board sounds very good; everything appears to be original. Some of the capacitors are 35V types. If the board is supplied with the specified voltage of 2x28V AC, these capacitors will burst. This amplifier runs very well with a maximum voltage of 22V.
https://www.ebay.de/itm/40323871287...IkhxjHJTLq&var=&widget_ver=artemis&media=COPY
What do you need this board for?
It is definitely not recommended for hi-fi use.
TDA7293/4 are widely counterfeited and having a good performance from a counterfeit is far from possible.
If you really need a very high quality board try these - https://www.kaltecs.com/60w-ultra-low-distortion-kit/
Ultra-low distortions and noise.
It is definitely not recommended for hi-fi use.
TDA7293/4 are widely counterfeited and having a good performance from a counterfeit is far from possible.
If you really need a very high quality board try these - https://www.kaltecs.com/60w-ultra-low-distortion-kit/
Ultra-low distortions and noise.
Have you tried the circuit board?
I think the sound is very good and I don't think it's a fake. The Kaltec board uses a similar circuit and is slightly better equipped, but it also costs several times more!
Hast du es schon mit der Platine probiert?
Ich finde den Klang sehr gut und halte es nicht für einen Fake. Das Kaltec Board nutzt eine ähnliche Schaltung und ist etwas besser ausgestattet, kostet dafür aber auch ein Vielfaches!
I think the sound is very good and I don't think it's a fake. The Kaltec board uses a similar circuit and is slightly better equipped, but it also costs several times more!
Hast du es schon mit der Platine probiert?
Ich finde den Klang sehr gut und halte es nicht für einen Fake. Das Kaltec Board nutzt eine ähnliche Schaltung und ist etwas besser ausgestattet, kostet dafür aber auch ein Vielfaches!
One cant prove fake from original. Unless measured to its full specifications. But Original TDA7293 costs 8 US Dollars. Since most users listen at low volume fakes works flawlessley.
I initially thought they were counterfeits, so I swapped the two TDA7293s for ones I'd purchased from Mousers on the first board I installed. They sounded no different, whether loud or quiet! Even if the TDA7293s were indeed counterfeit, they don't sound any worse. In any case, this board sounds better than many other TDA7293s I've heard before. I don't want to justify myself any further here. This board offers very good value for money.