Valve / Tube mics
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Last updated 4:31 PM on 3/26/26
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4 Terms
1
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Why did early condenser mics use vacuum tubes (valves)
Before solid-state electronics, tubes were needed to amplify the extremely low output of the condenser capsule and to match the output impedance
2
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What power supply does a tube mic require and why
A dedicated external PSU - the high power demands of vacuum tubes exceed what phantom can provide, each PSU is mic-specific
3
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What is the step by step way to set a valve mic up
XLR from PSU→Mic
XLR from PSU→ Tie Line
Plug in PSU to mains
Switch on
Don’t plug/unplug the mic once powered
4
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Neumann U67
Famous valve mic
3 polar pattern
Full 20-20kHz
