I have soundtouch 300 with AM300 and 2 VI 300 speakers. Prior to update 15.x my music used to sound pretty good. Especially when I played music over Bluetooth using Amazon music app, I really got good bass from Am300. Post update I get good sound if I play from TV (Netflix movies etc), but when I play music via Bluetooth, the bass levels have dropped significantly. When I try to pair all speakers again, the bass module emits a sound, but sounds different compared to the way it used to sound before. Almost as if the bass signal is not as strong as before from the soundtouch 300 to AM300. Is anyone else experiencing this?
Posting the solution for others experiencing this: (Thanks to @PatR171 for some excellent pointers )
Step 1: Download the old firmware from here (14.x)
Step 2: Follow the "Manually updating with a USB cable (alternate method)" guide form here:
Once the screen in your browser says "firmware uploaded, waiting to reboot", you might get wi-fi and soundtouch lights blinking orange alternately. I just pulled the power cable from the soundbar, put it back in. This made it restart properly, and I got a solid white light. This shouold restore the lost BASS back to normal 🙂 I would recommend doing ADAPTiQ after this. Also I have decided not to use any soundtouch app now, because it might force you to update to 15.x 🙂