Subwoofer sound between radio station tracks

[tim3320070]

Hello- playing WFMT radio on TuneIn and when the track switches I hear a near full volume sound/note/tone from just the sub (lasts about 2 seconds).

Sub out directly to sub and tuned with RoomFit and synced with speakers.

Any ideas?

 

[harkpabst]

Sorry, no idea, just a question for you to confirm: This is happening with TuneIn only, not with any other source?