I'm evaluating the Frequency Response and subsequently Step Response of a bandpass filter. Is the frequency response going to be different for an active bandpass filter from a passive bandpass filter? I've plotted the frequency response using LTspice with the following setup: Small signal AC analysis: AC amplitude: 15 V Simulation Command: Type of sweep: Octave Number of points per octave: 30 Start frequency: 1 Stop frequency: 300 My hand calculations suggest the max frequency should be about 40 kHz. However, using the -3dB rule, the max frequency ends up on 100 kHz. Any suggestions?