The EAR 824M is a high quality stereo valve microphone preamplifier. It is easy to use and makes an excellent choice whether one is seeking to upgrade from an existing microphone preamplifier, or looking for a preamplifier to go with a newly purchased microphone. Front panel mounted gain controls for each channel provide 44 dB of adjustment in 2 dB steps. This combined with a switchable 10dB attenuator enables the EAR 824 to accept signals from 1mV to line level. 48V phantom powering is provided as standard; however, other configurations are available to order, including 130V power for B & K line level microphones and a custom EAR 60dB transformer for use with ribbon microphones.