Twice in the the two months I've owned my 436, the speaker has blown. After a three week wait for a 10 minute fix, I'll have had my radio in the shop for 6 weeks out of the 10 or so I've owned it. It's really frustrating since it has never been above 11, maybe 12 on the volume. I think the issue lies in the <lack of> AGC that doesn't seem to do anything on the P25 systems in the area. I'd like to try finding a more robust speaker that I could install myself. Anyone tried or have any ideas about this?