i had this issue only 20 days of owning amplifi 150..(dim light tone lights and bluetooth light and no response) ended up sending it back under the 45 day return policy, so not sure what it is. now im having another issue completely different. clean tones are distorted after not even an hour or so playing it... im tryin to see if there is a feed on that. i hope i dont have to replace this one again... if i do might just get something else.