Reference Signal Meter Barium is available in two versions.* Barium is a single-channel reference bargraph meter with 20 LEDs* Barium Duo is a dual-channel reference bargraph meter with 2x 20 LEDs The bargraph meters have:* 42 dB range with peak hold* dBu and dBFS scale Due to it’s very precise calibration, Barium can be perfectly used as reference meter. As standard, the Barium meters are set to -18 dBFS = 0 dBuThis can be changed to -20 / -22 / -24 dBFS = 0 dBu, using the dip switch on the main PCB. Barium is a 20 LED reference bargraph meter in Octa and 500 series format.Barium can be inserted anywhere in the signal.Barium input is hard-wired to output.Your signal is not interrupted or coloured in any way Product page on the Interphase Audio website Barium is available with "Silver" or "Black" faceplate and can be used in the Octa Rack or in any 500-series rack. Video link:https://youtu.be/oDR9jXsB9Hk