Here Suggested power supply: 12V / 1A
This makes for P = U * I so roughly 12 watts of power. Here the efficiency of the circuit added,
and you have about 2 x 5 Watt (D / T - amplifier) or about 2 x 2.5 Watt (AB - amplifier) at 4 ohms! At 8 ohms about 60% of it.
Alone the price should have thought-provoking, apart from the fact that the necessary components for real 400 watts in this little box could find never space.
I do not want to speak ill amplifier, because it surely is sufficient and convenient for many, but such applications limits for me to fraud. This thing has (1 ms for example) achieved in some non-standard test device for a very short time the 400 watt peak (also known as PMPO). If we make this shorter time he reached 800 watts before it goes up in smoke.
However, this is not meaningful for the application.
Just one more note: A speaker is faster with a weak amplifier destroyed as by a strong.
This explains the abutting 150 watt speakers a Vorrezesenten. The amplifier has too little force to control the speaker. So please do not your LS so broken.
