Who needed audio forums back then, with this kind of advice? And who else thinks this looks like the work of Don Martin, Mad’s Maddest Artist? From Audio, May 1954.
You can’t go wrong with the creative application of printed wiring. From reader Chris Kelley.
Now I get it! From Electronics Made Easy, 1956.
Jeff Rowland Design Group gave these buttons out at a CES around the late 1980s or early 1990s.
No need to spend hours on speaker placement; just get this! From Audio, August 1958.