Destiny Emblem Collector v5.3.26.24 - Four Emblems Updated
Mad Dog is available from now until reset on the 16th, obtained by watching a Destiny 2 drop-enabled Twitch streamer for an hour.
Mad Dog: https://destinyemblemcollector.com/emblem?id=3029657020
Explosive Disassembly is available by hitting Rank 5 on the Heavy Metal Event Home reputation track.
Explosive Disassembly: https://destinyemblemcollector.com/emblem?id=1611948521
Polychromatic Refraction appears to be a content creator giveaway emblem
Polychromatic Refraction: https://destinyemblemcollector.com/emblem?id=3029657023
Galvanic Bass: Given to content creators that are part of the Destiny 2 Creator Hub
Galvanic Bass: https://destinyemblemcollector.com/emblem?id=3063212161
That should be it for now!