Questions about this TK2050 module

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Hi!
I like to buy this module. A friend of mine is using it and it sounds really great with his 8ohm speakers.
New TK2050 50W+50W Class T HIFI Stereo Audio Digital Amplifier Board 12V Voltage -- BuyinCoins.com

But I can't find any datasheet for it
Does anyone here know it?
I have some questions:
-Why they are saying only 6-8ohm Output Impedance? Does it tend to overheat with 4ohm, or are the capacitors not stable enough, or does it's output filter not work well accustically with 4 ohm load? If overheating or the capacitors are a problem I could simply use 16V input instead of 24V, right?
-Does anyone know where to buy audio input cables for this weird plug?
-Can you use them mono by using Left Channel - and Right Channel + and get double the power or the half heat?

Thx in advance!
 
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Hi

in general these type amps are already bridged ... by the looks of the board this one is too.. so that option is out as well as using a common ground on your speaker line.

The output power is often governed by output transistor / filter configuration which means they will work with lower impedance speakers its just they do not always follow expected rules of 4 ohm = nearly double the power and may have some high frequency oddities too.

HiFiMeDIY do a series of these amps with different output characteristics for different speakers.. The sound quality v price ratio on these modules are pretty difficult to beat (IMHO) ..

hope this helps

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