Has Sonos removed the ability to control an aftermarket sub and speakers with the amp. I know they took this feature away from the Mac desktop app. Now it looks like they took it out of the mobile app.
Looks like you can no longer set the crossover between external sub and passive aftermarket speakers. Nor can you adjust the aftermarket sub level.
I adjusted this just yesterday. Then this morning noticed that the subwoofer was very overpowering. I went to the mobile app to turn down the sub level and noticed any subwoofer and speaker adjustments were gone.