I'm building a little sound amplifier for something and can't quite understand why it's not a powerful as I though it might be. This is the circuit, and a simulated DC sweep is shown below:-
Vdrive is the meeting point of the output transistors Q1 and Q3. (Don't know what happened to Q2). The op amp is an LT1006. You can see that there is the possibility of a 1V to 11V output swing which makes kinda sense allowing for the op amp approaching it's rails. And it's linear wrt the input signal, symmetrical about a 6V mid point.
This these are the transient analyses for signals of 1.5V (4Vp-p) and 4V (8Vp-p):-
You can see that the first graph is slightly clipped. And the clipping just increases as the input signal increases above 1.5V, as in the second graph. Nevertheless the 4V signal should still fit into the output range as calculated by the sweep analysis. The clipping also occurs independently of the signal frequency. Why? Shouldn't that output signal range be identical to the sweep analysis? Otherwise what's a sweep analysis for?