This amplifier is in really good condition considering age. See pics for tubes used and other details. As far as I know RCA made the 6SJ7 tubes, but printed Stromberg Carlson on them. Also, there is a tube eq, treble and bass control. Thanks for looking and good luck. The item “Stromberg Carlson Tube Microphone Amplifier With Equalizer RCA Altec” is in sale since Tuesday, October 18, 2016. This item is in the category “Musical Instruments & Gear\Pro Audio Equipment\Vintage Pro Audio Equipment”. The seller is “tonezzone” and is located in Chattanooga, Tennessee. This item can be shipped worldwide.
- Type: Vintage Microphone Tube Amplifier
- Brand: Stromberg Carlson 130 Watts Tube
- Country/Region of Manufacture: United States
- Model: AU-58B