Pre-amplifier Dimensions W x D x H: 483 x 275 x 44 mm Frequency range: 20...25 000 Hz Input: 1×Line XLR (bal) 0dB/20 kOhm, 5×Line RCA (unbal) 500 mV/10 kOhm, 1×Mic 1/4" jack/Combo (bal) –50 dB/600 Ohm Output: 0 dB 100 Ohm balanced – XLR, 0 dB 100 Ohm unbalanced – RCA Jack Power supply: 230 V/50 Hz Weight: 3.1 kg