These two articles explain in thorough detail how the digital 'dBFS' metering differs from the VU and dBU metering that analog sound processors employ. The bx_console plugin utilizes traditional Neve console VU metering. And as you will see in the articles below, there is a big difference between what some other meters are telling you and what the bx_console meters give you.


http://www.soundonsound.com/sound-advice/q-whats-difference-between-ppm-and-vu-meters

http://www.audiorecording.me/what-is-the-difference-between-dbfs-vu-and-dbu-in-audio-recordings.html