Power:
-4ohms 10W (left lamp)
-8ohms 7W (right lamp)
Efficiency: around 50%
Frequency response: flat from 40Hz-20Khz
A classic multistage class ab amplifier. Im taking an average of 450mA drawn for 8ohms which means around 16W current draw for the 7W output power. That means around 50% efficiency for 8ohms (normal for class B). For 4ohms im taking an average of 750mA current draw so around 26W for the full 10W in 4ohms. Here you see that efficiency levels drop beneath 50%. Now i know it seems that the output is too low for a 35V power source. This is because the amp is optimised for lowest noise and THD levels by adding the 100nf capacitive negative feedback. This negative feedback will also ensure that no self excitations will occur. If you want more ,,kick,, to it you just decrese the capacitors value to 47nf or even less for higher power, but be aware that the sound will somewhat deteriorate if you decrease the negative feedback and the consumption will increase so the parameters i have given will no longer apply with the new conditions.
