I'm working on an audio crossover for a friend's stereo system. I have a passive design that uses a single 330uF in series with the positive audio line. It works like a charm , but I'd like to see if I can pull off an active filter instead.
I have a MAX410, MAX492, TLC7111 (which so far has produced the worst quality), as well as an ADA4895-1 (which I'm working on putting on a board to test). So far the MAX410 has produced the best results and sound (which is what I have currently hooked up). But with one issue....
It seems the volume is about 1\16th that of the input signal. I have tried at least a half dozen schematics\configurations with the same results. And this is a big problem as I need the input and output signals to match volume. But it's seeming like this may not be possible
Here is my schematic. VCC is +5V, R2, 3, and 4 are 10k (with the exception of R1 which is 1k), and C1\C2 are 0.1u:
And here is a picture of my breadboard using the MAX410 (Ignore the board in the upper left corner. It's NOT being used or at all active):
I have also tried running the op amp with both a regular ground as well as a virtual ground by using a 1k voltage divider; same result of the output being too quiet.
The output is to speakers. Currently I'm using headphones with a 23 ohm impedance. His system is a 4 ohm impedance.
EDIT: Please ask for any information that you need on top of the information I have provided. I have given everything that I currently have.