[AMRadio] balancing highs & lows

[ae6cm]

Nigel wrote:
> "There's a rule-of-thumb that describes this. I can't remember it - maybe 
> someone here knows it?"

Lower frequency limit = 600,000 divided by the upper frequency limit.  This 
is according to "Cut-Off Frequencies and Audio Quality" in QST November 
1950.  There are three good similar articles with citations in that issue. 
Search by author: Neil, Stuntz, or Grammer.

73, Al