I recently set up Trueplay on a couple of Play:1s that I own. When testing out the post-Trueplay calibration sound I discovered bass distortion once I dialed up the speaker to about half-way on the volume bar (my EQ had bass and treble right in the middle and Loudness was turned off). At first I thought it was an issue with my speaker, but turning off Trueplay removed the distortion issue. The best way to describe the distortion is that it is a deep popping bass sound like occurs intermittently (maybe once every couple of seconds, but that depends on how bass heavy the song is).
Anyone else having this issue with a Trueplay-tuned Play:1?