A clipping problem arose one day while recording a really loud vocalist singing through a U47 microphone. The problem was assumed to be the clipping of the microphone since every mic preamp in the studio also was clipping in this signal chain.
Upon further measurement it was determined that the U47 output was not clipping, it was outputing a signal of -15 dBm. Too much output for most mic preamps.
The solution was the A9033. This microphone preamp was designed for this situation. However, the added benefit of passive voltage gain possibly makes this the most transparent and open sounding microphone preamp ever.
AnaMod Realios 9033's features
Passive transformer gain
Switch for phantom power
Phase reverse switch
AnaMod Realios 9033's specifications
Microphone Input Impedance: 1.2KΩ, balanced
Output Impedance: less than 50Ω
Max. Output Level: +32dBu, transformer balanced
Gain: 5 to 20 dB in 3 dB steps
Frequency Response: +/- 1 dB from 7Hz to 85kHz
Noise Level: better than 86dB below +4dBu, 0-30kHz