Compact guitar direct injection phantom power box audio mixer/guitar line selector that transforms unbalanced signal into balanced, minimizing noise and loss of tone. The unit provides a Hi-Z input for guitar and bass and is powered by +48V phantom power or DC 9V adapter (not included). Rated input level: -20 dBu/0 dBu/+20 dBu. Maximum input level: +48 dBu. Frequency response: 10 Hz-40 kHz (-1 dB). Dwell noisy: -110 dBu. THD+N: 0.055% 100mV RMS. Dimensions: 120 x 83 x 51 mm. Weight: 349 g.