Up2 Stream Pro V4?


I recently purchased an Up2 Stream Pro V3, but it has Up2 Stream Pro V4 silkscreened onto the underside of the board.

Is this a V3 or is there actually a V4? If it is, what are the differences?


Hi, we’ve made a little change on V4 to solve the I2S output issue which has full volume while working in master mode when grouped. And considering the existing data and effort of this product on shop, we did not update the name.

It’s super confusing. I never know what the “ampless” device is called. I have both a v3 and a v4 and, v4 being completely bricked after a failed install of a v3 OTA firmware update.