LB-20 is a portable and compact two-channels Line Level Booster. It offers selectable gain of +10 and +20 dB. CLIP indicators will help finding the right setting. LB-20 is a very compact, battery-powered low-noise line level amplifier, housed in an black-anodized all aluminium case. Inputs and outputs are 3-pole mini-XLRs. Gain is selectable in three steps: 0 dB, +10 dB and +20 dB. CLIP indicators show red at 1 dB below output clip level. LB-20 can be powered by four internal standard AAA batteries for 10 – 15 hours continuous use, or by an external DC power supply with 6 – 18 V output @ 100 mA.