Taking its name from Robbie the Robot of old-school sci-fi movie Forbidden Planet, the Blue Robbie microphone preamp is anything but antiquated in its functionality. This single-channel class-A tube mic pre has a transformerless I/O for ultra-quiet sound, and boasts an ECC88 twin triode at the tube gain stage. A wide 10Hz-100kHz frequency response with 34dB of headroom before you get clipping make this mic pre, though contained in unique and funky housing, a super practical addition to any setup.