Siemens V72 Racked

The Siemens V72 is a legendary, vintage Class-A tube microphone preamplifier built in Germany during the 1950s and 1960s for professional broadcast and recording studios. You can explore surviving vintage units and current market availability on Reverb. [1, 2, 3]History and Background

• Development: Developed between 1949 and 1952 by North West German Radio and the Institute of Broadcast Technology in Hamburg.
• Manufacturers: Built primarily by Siemens, Telefunken, Maihak, and TAB.
• Production Run: Around 25,000 units were made for the German radio network before transistor gear replaced them in the mid-1960s.
• Famous Usage: Modified versions wired in series were used in early EMI REDD mixing consoles, famously recording the Beatles. [1, 2, 3]

Technical Specifications

• Design: Compact "Danner" cassette module housing.
• Gain: Fixed gain of 34 dB (the V72a variant features 40 dB).
• Tubes: Uses dual EF804S vacuum tubes.
• Power: Requires an external or custom power supply (typically 220V–230V). It lacks built-in 48V phantom power.