The American Radio History site also has archives of Audio magazine and Radio-Electronics which were the two I used read back in the day.
In the March and October 1969 issues of Radio Electronics Norman Crowhurst a major pioneer of "hi-fi" wrote about electronic versus electric crossovers. (ie active vs passive) a pair of articles that changed my life. page 32 in March and 42 in October.
Audio Magazine was a great source of better and seemingly more honest (I may be fooling myself on that) information as opposed to magazines strictly driven by advertising.
They also have Popular Electronics which was a good one too.