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A Beginners Quick Guide To Measuring And X-over Design
The most common and easily understood active filter is the Active Low Pass Filter. Its principle of operation and frequency response is exactly the same as those for the previously seen passive filter, the only difference this time is that it uses an op-amp for amplification and gain control. The simplest form of a low pass active filter is to connect an inverting or non-inverting amplifier, the same as those discussed in the Op-amp tutorial, to the basic RC low pass filter circuit as shown.
"Not a Speaker Designer - Not even on the Internet"
"If the freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter."
I think everyone appreciated the attempt and intent of your deleted post. People offered advice not criticism about how to make it more beneficial to the forum. You
put a lot of time into your post so don't let a misunderstanding keep you from re-posting it unless you had different intentions to begin with.
I'm not sure he took it personally like we were getting on his case for the lack of formatting, I took it that he was frustrated with how the forum works.
Either way, repost it... we can copy and reformat/paste if it's just a readability issue. I saw it when it was first posted but intended to take a deeper look later on.