You can calculate how much in volts you need based on the gain of your amp and the load impedance.
Vout=sqr(P*Rload)
Vin=Vout/A
A is the AC voltage gain of the amp. (Rf/Rg)
For example:
P=40W and Rload=8Ohm
Vout=17.9V
for a gain of 22
Vin=0.813V
It means that the amp with 0.9 V from the SB will drive the speaker to a little more than 40W
Vout=sqr(P*Rload)
Vin=Vout/A
A is the AC voltage gain of the amp. (Rf/Rg)
For example:
P=40W and Rload=8Ohm
Vout=17.9V
for a gain of 22
Vin=0.813V
It means that the amp with 0.9 V from the SB will drive the speaker to a little more than 40W
Dxvideo said:My TDA2052 gainclone's gain is 22K/680ohm.. So you say its enough?
Thanks
More than you need:
gain: 22k/.68k=32
Vout= 32x0.9=29Vac
Pout=29x29/8=100W
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