equalizers

Audio Anthology: Collected Hi-Fi articles from AUDIO ENGINEERING in the 1940s

PS dot com reader Paul R. was kind enough to send us a scan of "Audio Anthology," (ed. C.G. McProud)…

12 years ago

UPDATE: Vacuum Tube Program EQ project – Part 2

The vacuum-tube powered program EQ that I described in this previous post is nearly complete.  This thing has sat on…

13 years ago

A Few Interesting DIY Audio Projects c. 1955

Circuit for a simple bass/treble parametric equalizer that uses no inductors.  Could be  a useful piece.  Not sure if 250k/500k…

13 years ago

Pro Audio hardware of the early 1950s

The General Electric (GE) BA-5-A Limiter Continuing our review of the first two years of AUDIO magazine, today we will…

13 years ago

Orban Audio Processors of the 1980s

Download the four-page circa 1984 Orban 'condensed catalog': DOWNLOAD: OrbanCondCatalog Photos and descriptions (no specs) of the following models: Orban…

13 years ago

Fostex ‘Personal’ Outboard Equipment of the 1980s

Download fourteen-pages of original product information regarding FOSTEX' "Personal Multitrack" outboard-equipment line of the 1980s: DOWNLOAD: Fostex_Outboard_Gear_1986 Included in this…

13 years ago

Simple Tube Program EQ project

From the September 1947 issue of RADIOCRAFT magazine: an interesting 'response equalizer' project that looks to have great potential for…

13 years ago